Howard E. Haber

Howard Haber
Office	ISB 326
Phone	1-831-459-4228
FAX	1-831-459-5265
Address	Department of Physics University of California 1156 High Street Santa Cruz, CA 95064 USA
Office Hours	Mondays and Thursdays 2--3 pm
e-mail	haber@scipp.ucsc.edu
alternate e-mail	haber@ucsc.edu

This is the professional website of Howard Haber, Professor of Physics at the University of California, Santa Cruz.

January 18, 2015: An expanded version of my notes entitled Notes on antisymmetric matrices and the pfaffian have been posted to Section VI of this website.

January 12, 2015: My presentation to Physics 205 can be found in Section V of the academic website.

January 12, 2005: My talk entitled Higgs Physics and the ILC, given at the January 2015 SiD Workshop at SLAC has been posted to Section VII of this website.

January 7, 2015: The 2015 Particle Physics conference schedule has been posted to Section VIII of this website. Although not meant to be comprehensive, it covers many conferences that overlap with my research interests.

October 31, 2014: Version 2 of the paper entitled Complementarity Between Non-Standard Higgs Searches and Precision Higgs Measurements in the MSSM was re-posted today on the arXiv. The revised version adds a short discussion on possible symmetries that may govern the alignment limit of the two-Higgs doublet model, in contrast to the case of the MSSM where the alignment limit, if present, is the result of an accidental cancellation of tree-level and loop-level contributions. A link to the revised paper can be found in Section II of this website.

October 29, 2014: The San Francisco Giants win the World Series in the deciding Game 7, with a 3--2 win over the Kansas City Royals. What an epic game! Three hours of high drama and a once in a lifetime pitching performance by Madison Bumgarner to earn a five inning save.

October 21, 2014: My paper in collaboration with Marcela Carena, Ian Low, Nausheen Shah and Carlos Wagner entitled Complementarity Between Non-Standard Higgs Searches and Precision Higgs Measurements in the MSSM was posted today on the arXiv. A link to this paper in Section II of this website.

This paper examines the conventional wisdom that the constraints of the precision Higgs data implies that additional non Standard Model (SM)--like Higgs bosons of the MSSM should be heavy, with masses larger than about 400 GeV. We demonstrate that this conclusion does not hold when the theory approaches the conditions for "alignment independent of decoupling", where the lightest CP-even Higgs boson has SM-like tree-level couplings to fermions and gauge bosons, independently of the non-standard Higgs boson masses. We find that precision Higgs measurements and direct searches are complementary, and may soon be able to probe the region of non-SM-like Higgs boson with masses below the top quark pair mass threshold of 350 GeV and low to moderate values of tan β.

September 25, 2014: My talk entitled Constraints on the alignment limit of the MSSM Higgs sector, given at the IFT Program on Physics Challenges in the face of LHC-14 at the Instituto de Fisica Teórica in Madrid, Spain has been posted to Section VII of this website. This talk updates the one of the same title given in Lisbon four weeks earlier.

September 23, 2014: My talk entitled Motivations for a stable scalar in an extended Higgs sector, given at the IFT Program on Physics Challenges in the face of LHC-14 at the Instituto de Fisica Teórica in Madrid, Spain has been posted to Section VII of this website.

September 9, 2014: My talk entitled 2HDM Benchmarks--Theoretical Framework, given at Higgs Days at Santander 2014 has been posted to Section VII of this website.

September 3, 2014: The 2014 edition of the Review of Particle Physics is now available on the Web. Included are the Summary Tables, Particle Listings, pdgLive and Review articles, including my updated review of Supersymmety Theory. The Review of Particle Physics is now published in the August, 2014 issue of Chinese Physics C. A hard copy of the review can be obtained here. [PDF]

September 2, 2014: My talk entitled Constraints on the alignment limit of the MSSM Higgs sector, given at the Workshop on Multi-Higgs Models in Lisbon, Portugal has been posted to Section VII of this website.

July 22, 2014: My talk entitled Can the Hbb coupling be equal in magnitude to its SM value but opposite in sign?, given at the SUSY 2014 Conference in Manchester, UK, has been posted to Section VII of this website.

June 13, 2014: I gave a talk via vidyo to the Workshop of the LHC Higgs Cross Section Working Group at CERN entitled 2HDM---Report on recent activities, which has been posted to Section VII of this website.

June 6, 2014: Team Re-Entry's attempt to win its third consecutive UCSC Intramurals Coed Softball Championship was thwarted by Team Musashi. For more details on the 18--12 loss in the Championship game, click on this link.

June 3, 2014: My paper in collaboration with Pedro Ferreira, Rui Santos and John Gunion, entitled Probing wrong-sign Yukawa couplings at the LHC and a future linear collider was published today in Physical Review D. This paper discusses the possibility that all couplings of the recently discovered Higgs boson are close to their Standard Model values in magnitude, but the overall sign of Higgs coupling to down-type fermions is reversed as compared to its Standard Model value. Prospects for detecting this wrong-sign Yukawa coupling at the LHC and ILC are investigated. A link to this paper can be found in Section II of the academic website.

Listings of older news items are stored here.

I. Research

The basic themes underlying my research program involve the study of: (i) the dynamics responsible for electroweak symmetry breaking; (ii) the theory and phenomenology of Higgs bosons; (iii) TeV-scale supersymmetry as a framework for incorporating a weakly-coupled Higgs sector; (iv) the phenomenology of signals for new physics beyond the Standard Model at the Large Hadron Collider (LHC) and future colliders; and (v) connections of low-energy phenomena with fundamental scales that lie beyond the TeV scale (e.g. lepton number violation and implications for neutrino masses).

The properties of the newly discovered Higgs boson have profound implications for the dynamics of electroweak symmetry breaking and the possible structure of new physics that may lie beyond the Standard Model (SM) of particle physics. For example, most approaches to physics beyond the SM include extended Higgs sectors. Present Higgs data suggest that the properties of one of the scalars of the Higgs sector (identified with the observed Higgs boson) must have properties that closely approximate that of the SM Higgs boson. This constraint in turn imposes important constraints on any SM extension. The two-Higgs doublet model (2HDM) is a convenient theoretical laboratory for the study of extended Higgs sectors. Indeed, the two doublet extended Higgs sector is a key component of the simplest supersymmetric extension of the SM.

The theoretical structure and phenomenological profile of the 2HDM has attracted much attention in recent years. My recent work has advocated the importance of a basis-independent treatment of the 2HDM. Recently, I have focused on the relevance of the so-called decoupling and alignment limits of the 2HDM in which one of scalars closely resembles the SM Higgs boson. The basis-independent technology provides a very powerful and simple framework for studying and interpreting these limits.

If new physics beyond the SM emerges at the LHC, it will be essential to develop techniques for measuring new particle interaction strengths at high energy colliders. By detecting relations among various independent couplings, one can ascertain underlying symmetries and distinguish among different theoretical interpretations of the new physics. For example, with sufficient precision, it will be possible to provide convincing evidence for or against a supersymmetric interpretation of new fundamental physics phenomena. A precision Higgs program at the LHC and at a future collider (such as the proposed International Linear Collider) can also provide important clues as to what may lie beyond the Standard Model.

II. Publications

All my profession publications can be found here on the INSPIRE HEP database.

Most of my professional publications since 1992 are stored on the e-print archive hosted by arXiv.org. PDF and Postscript versions of the stored papers can be found here.

Link to my most recent preprint:

Complementarity Between Non-Standard Higgs Searches and Precision Higgs Measurements in the MSSM
Marcela Carena, Howard E. Haber, Ian Low, Nausheen R. Shah, Carlos E. M. Wagner. Oct 18, 2014. 43 pp.
EFI-14-36, FERMILAB-PUB-14-392-T, MCTP-14-37, SCIPP-14-16
e-Print: arXiv:1410.4969 [hep-ph] | PDF
Detailed record - Cited by 2 records

Link to my most recent publication:

Probing wrong-sign Yukawa couplings at the LHC and a future linear collider
P.M. Ferreira, John F. Gunion, Howard E. Haber, Rui Santos. Mar 19, 2014. 24 pp.
SCIPP-14-02, UCD-2014-2
Published in Phys.Rev. D89 (2014) 115003
DOI: 10.1103/PhysRevD.89.115003
Published version: [PDF]
e-Print: arXiv:1403.4736 [hep-ph] | PDF
Detailed record - Cited by 22 records

Link to my most recent conference proceedings:

The Higgs data and the Decoupling Limit
Howard E. Haber. Dec 31, 2013. 15 pp.
SCIPP-13-15.
Published in the Proceedings of the Toyama International Workshop on Higgs as a Probe of New Physics 2013 (HPNP2013) on eConf
e-Print: arXiv:1401.0152 [hep-ph] | PDF
Detailed record - Cited by 3 records

Eleven selected publications from the last eleven years are listed below.

Decoupling of the Right-handed Neutrino Contribution to the Higgs Mass in Supersymmetric Models
Patrick Draper, Howard E. Haber. Apr 22, 2013. 27 pp.
SCIPP-13-04.
Published in Eur.Phys.J. C73 (2013) 2522
DOI: 10.1140/epjc/s10052-013-2522-7
Published version: [PDF]
e-Print: arXiv:1304.6103 [hep-ph] | PDF
Detailed record - Cited by 5 records

Mass-degenerate Higgs bosons at 125 GeV in the Two-Higgs-Doublet Model.
P.M. Ferreira, Howard E. Haber, Rui Santos, Joao P. Silva. Nov 2012. 17 pp.
SCIPP-12-14.
Published in Phys.Rev. D87 (2013) 055009
DOI: 10.1103/PhysRevD.87.055009
Published version: [PDF]
e-Print: arXiv:1211.3131 [hep-ph] | PDF
Detailed record - Cited by 51 records

Group-theoretic Condition for Spontaneous CP Violation.
Howard E. Haber (UC, Santa Cruz), Ze'ev Surujon (UC, Irvine). Jan 2012. 25 pp.
SCIPP-12-01, UCI-TR-2012-01.
Published in Phys.Rev. D86 (2012) 075007
DOI: 10.1103/PhysRevD.86.075007
Published version: [PDF]
e-Print: arXiv:1201.1730 [hep-ph] PDF
Detailed record - Cited by 4 records

Basis-independent methods for the two-Higgs-doublet model III: The CP-conserving limit, custodial symmetry, and the oblique parameters S, T, U.
Howard E. Haber, Deva O'Neil (UC, Santa Cruz). Nov 2010. 58 pp.
SCIPP-10-18.
Published in Phys.Rev. D83 (2011) 055017
DOI: 10.1103/PhysRevD.83.055017
Published version: [PDF]
e-Print: arXiv:1011.6188 [hep-ph]
Detailed record - Cited by 32 records

Supersymmetric Monojets at the Large Hadron Collider.
Benjamin C. Allanach (Cambridge U., DAMTP), Sebastian Grab, Howard E. Haber (UC, Santa Cruz). Oct 2010. 42 pp.
DAMTP-2010-83, SCIPP-10-16.
Published in JHEP 1101 (2011) 138, Erratum-ibid. 1107 (2011) 087, Erratum-ibid. 1109 (2011) 027
DOI: 10.1007/JHEP01(2011)138, 10.1007/JHEP07(2011)087, 10.1007/JHEP09(2011)027,
Published version: [PDF] [Erratum 1] [Erratum 2]
e-Print: arXiv:1010.4261 [hep-ph]
Detailed record - Cited by 23 records

Geometric picture of generalized-CP and Higgs-family transformations in the two-Higgs-doublet model.
P.M. Ferreira (Lisbon, ISEL & Lisbon U., CFTC), Howard E. Haber (UC, Santa Cruz), M. Maniatis, O. Nachtmann (Heidelberg U.), Joao P. Silva (Lisbon, ISEL & Lisbon, IST). Oct 2010. 31 pp.
SCIPP-10-15, HD-THEP-10-1.
Published in Int.J.Mod.Phys. A26 (2011) 769-808
DOI: 10.1142/S0217751X11051494
Published version: [PDF]
e-Print: arXiv:1010.0935 [hep-ph]
Detailed record - Cited by 22 records

Hard supersymmetry-breaking 'wrong-Higgs' couplings of the MSSM.
Howard E. Haber, John D. Mason (UC, Santa Cruz). Nov 2007. 32 pp.
SCIPP-07-16.
Published in Phys.Rev. D77 (2008) 115011
DOI: 10.1103/PhysRevD.77.115011
Published version: [PDF]
e-Print: arXiv:0711.2890 [hep-ph]
Detailed record - Cited by 22 records

Seesaw mechanism in the sneutrino sector and its consequences.
Athanasios Dedes (Durham U., IPPP & Ioannina U.), Howard E. Haber (UC, Santa Cruz), Janusz Rosiek (Durham U., IPPP & Warsaw, CFT). Jul 2007. 63 pp.
IPPP-07-16,CPT-07-32, SCIPP-07-10.
Published in JHEP 0711 (2007) 059
DOI: 10.1088/1126-6708/2007/11/059
Published version: [PDF]
e-Print: arXiv:0707.3718 [hep-ph]
Detailed record - Cited by 42 records

Basis-independent methods for the two-Higgs-doublet model. II. The Significance of tan beta.
Howard E. Haber, Deva O'Neil (UC, Santa Cruz). Feb 2006. 48 pp.
SCIPP-06-01.
Published in Phys.Rev. D74 (2006) 015018, Erratum-ibid. D74, 059905(E) (2006)
DOI: 10.1103/PhysRevD.74.015018, 10.1103/PhysRevD.74.059905
Published version: [PDF] [Erratum]
e-Print: hep-ph/0602242 | PDF
Detailed record - Cited by 75 records

Basis-independent methods for the two-Higgs-doublet model
Sacha Davidson (Durham U., IPPP & Lyon, IPN), Howard E. Haber (Durham U., IPPP & UC, Santa Cruz). Apr 2005. 45 pp.
IPPP-03-23, DCPT-03-46, SCIPP-04-15.
Published in Phys.Rev. D72 (2005) 035004, Erratum-ibid. D72 (2005) 099902
DOI: 10.1103/PhysRevD.72.035004, 10.1103/PhysRevD.72.099902
Published version: [PDF] [Erratum]
e-Print: hep-ph/0504050 | PDF
- References | BibTeX | LaTeX(US) | LaTeX(EU) | Harvmac | EndNote | ADS Abstract Service
- Abstract and Postscript and PDF from arXiv.org; Phys. Rev. D Server
Detailed record - Cited by 140 records

The CP conserving two Higgs doublet model: The Approach to the decoupling limit
John F. Gunion (UC, Davis), Howard E. Haber (UC, Santa Cruz). Jul 2002. 42 pp.
SCIPP-02-10.
Published in Phys.Rev. D67 (2003) 075019
DOI: 10.1103/PhysRevD.67.075019
Published version: [PDF]
e-Print: hep-ph/0207010 | PDF
- References | BibTeX | LaTeX(US) | LaTeX(EU) | Harvmac | EndNote | ADS Abstract Service
- Abstract and Postscript and PDF from arXiv.org; Phys. Rev. D Server
Detailed record - Cited by 267 records

My two most highly cited papers (not including reviews) are listed below.

Can the mass of the lightest Higgs boson of the minimal supersymmetric model be larger than m(Z)?
Howard E. Haber, Ralf Hempfling (UC, Santa Cruz). Nov 1990. 12 pp.
Published in Phys.Rev.Lett. 66 (1991) 1815-1818
SCIPP-90-42
DOI: 10.1103/PhysRevLett.66.1815
Published version: [PDF]
- References | BibTeX | LaTeX(US) | LaTeX(EU) | Harvmac | EndNote
- ADS Abstract Service; CERN Library Record ; Phys. Rev. Lett. Server
Detailed record - Cited by 1241 records
Higgs Bosons in Supersymmetric Models. 1.
J.F. Gunion (UC, Davis), Howard E. Haber (UC, Santa Cruz & SLAC). Aug 1984. 111 pp.
Published in Nucl.Phys. B272 (1986) 1, Erratum-ibid. B402 (1993) 567-569
SLAC-PUB-3404.
DOI: 10.1016/0550-3213(86)90340-8; 10.1016/0550-3213(93)90653-7
Published version: [PDF] [Erratum]
- References | BibTeX | LaTeX(US) | LaTeX(EU) | Harvmac | EndNote
- CERN Library Record ; SLAC Document Server; Journal Server - Nuclear Physics B; . Journal Server - Erratum-ibid.
Detailed record - Cited by 1231 records

An article on the Higgs boson meant for a broader audience can be found below.

Viewpoint: Homing in on the Higgs Boson.
Howard E. Haber (UC, Santa Cruz). Mar 2012.
Published in Physics 5 (2012) 32
DOI: 10.1103/Physics.5.32
Published version: [PDF]
References | BibTeX | LaTeX(US) | LaTeX(EU) | Harvmac | EndNote
Journal Server - Physics

Detailed record - Cited by 1 record

The Higgs boson explained in 60 seconds

Howard E. Haber, Symmetry Magazine, volume 3, issue 6 (August, 2006) [HTML | PDF]

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III. Published Reviews

Supersymmetry, Part I (Theory).
Howard E. Haber (UC, Santa Cruz). Oct. 2013. 55 pp.
Review of Particle Physics (RPP)
Particle Data Group Collaboration (K A Olive (Minnesota U.) et al.). 2014. 1675 pp.
Published in Chin.Phys. C38 (2014) 090001
DOI: 10.1088/1674-1137/38/9/090001
Published version: [PDF]
Detailed record - Cited by 490 records
ILC Higgs White Paper
D.M. Asner, T. Barklow, C. Calancha, K. Fujii, N. Graf, H.E. Haber, A. Ishikawa, S. Kanemura, S. Kawada, M. Kurata et al.. Oct 23, 2013. 152 pp.
e-Print: arXiv:1310.0763 [hep-ph] | PDF
Detailed record - Cited by 80 records

Two-component spinor techniques and Feynman rules for quantum field theory and supersymmetry.
Herbi K. Dreiner (Bonn U.), Howard E. Haber (UC, Santa Cruz), Stephen P. Martin (Northern Illinois U. & Fermilab). Dec 2008. 246 pp.
BN-TH-2008-12, SCIPP-08-08.
Published in Phys.Rept. 494 (2010) 1-196
DOI: 10.1016/j.physrep.2010.05.002
Published version: [PDF]
e-Print: arXiv:0812.1594 [hep-ph]
Detailed record - Cited by 143 records

Webpage for Two-component spinor techniques and Feynman rules for quantum field theory and supersymmetry, maintained by Stephen P. Martin. Both the arXiv version and the Physics Reports version use the spacetime metric signature (+1,-1,-1,-1), as is found for example in the field theory textbooks by Ramond, and by Peskin and Schroeder . However, many people including one of the authors (S.P. Martin) prefer the metric signature (-1, +1, +1, +1), as is found for example in the textbooks by Weinberg, by Wess and Bagger, by Srednicki, and in Martin's Supersymmetry Primer. Here is a PDF file of v5 of our review with the (-1, +1, +1, +1) metric convention, which should be identical in content in every other respect: DHMspinors_v5.pdf.

The list of known corrections to the Physics Reports version (September 2010) is here: DHM_corr_PhysicsReports.pdf.

The list of known corrections to the arXiv v5 (311 pages, August 2010) is here: DHM_corr_v5.pdf.

Both the (+1,-1,-1,-1) and the (-1, +1, +1, +1) metric versions were made from the single LaTeX file DHMspinors_v5.tex. [If you are curious and want to LaTeX this for some reason, you may need the style files found here; other packages used should be in most standard LaTeX distributions. The choice of metric signature is implemented by simply changing a single character in the LaTeX file, namely the argument of line 16, with \def\signofmetric{0} corresponding to the (+1,-1,-1,-1) metric and \def\signofmetric{1} to the (-1, +1, +1, +1) metric.]

Higgs boson theory and phenomenology.
Marcela Carena (Fermilab), Howard E. Haber (UC, Santa Cruz). Aug 2002. 87 pp.
hep-ph/0208209,FERMILAB-PUB-02-114-T, SCIPP-02-07.
Published in Prog.Part.Nucl.Phys. 50 (2003) 63-152
DOI: 10.1016/S0146-6410(02)00177-1
Published version: [PDF]
e-Print: hep-ph/0208209
Detailed record - Cited by 401 records

Spin formalism and applications to new physics searches.
Howard E. Haber (UC, Santa Cruz & Santa Barbara, KITP). Apr 1994. 83 pp.
hep-ph/9405376, SCIPP-93-49, NSF-ITP-94-30, C93-07-26.
Published in In *Stanford 1993, Spin structure in high energy processes* 231-272
Presented at Conference: C93-07-26
e-Print: hep-ph/9405376
Postscript and PDF from this website.

Detailed record - Cited by 64 records

The Search for Supersymmetry: Probing Physics Beyond the Standard Model.
Howard E. Haber (UC, Santa Cruz & SLAC), Gordon L. Kane (Michigan U.). Jan 1984. 376 pp.
UM-HE-TH-83-17, SCIPP-85-47.
Published in Phys.Rept. 117 (1985) 75-263
DOI: 10.1016/0370-1573(85)90051-1
Published version: [PDF]
Detailed record - Cited by 4276 records

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IV. Published Books

Co-authored books

The Higgs Hunter's Guide.
John F. Gunion (UC, Davis), Howard E. Haber (UC, Santa Cruz), Gordon L. Kane (Michigan U.), Sally Dawson (Brookhaven). Jun 1989. 404 pp.
SCIPP-89/13, UCD-89-4, BNL-41644.
Published in Front. Phys. 80 (2000) 1-448
Detailed record - Cited by 338 records
Errata for The Higgs hunter's guide.
John F. Gunion (UC, Davis), Howard E. Haber (UC, Santa Cruz), Gordon L. Kane (Michigan U.), Sally Dawson (Brookhaven). Dec 1992. 5 pp.
hep-ph/9302272, SCIPP-92-58.
e-Print: hep-ph/9302272
Detailed record - Cited by 140 records

It seems that Westview Press has removed the link to the Higgs Hunter's Guide. However, it is still possible to order a copy from amazon.com. You can also order an e-book version of the Higgs Hunter's Guide from ebooks.com. A limited preview is available.

Edited books

Particle physics and cosmology: The quest for physics beyond the standard model(s). Proceedings, Theoretical Advanced Study Institute, TASI 2002, Boulder, USA, June 3-28, 2002.
H.E. Haber, (ed.) (UC, Santa Cruz), A.E. Nelson, (ed.) (Washington U., Seattle). 2004. 892 pp.
ISBN-9789812388926.
Prepared for Conference: C02-06-02.1 (River Edge, USA: World Scientific (2004) 892 p)
Detailed record - Cited by 2 records

Link to Particle Physics and Cosmology webpage at World Scientific Publishing.

Electroweak symmetry breaking and new physics at the TeV scale.
T.L. Barklow, (ed.) (SLAC), S. Dawson, (ed.) (Brookhaven), H.E. Haber, (ed.) (UC, Santa Cruz), J.L. Siegrist, (ed.) (LBL, Berkeley). 1996.
Published in Singapore, Singapore: World Scientific (1996) 736 p. (Advanced series on directions in high energy physics. 16)
Detailed record

Link to Electroweak Symmetry Breaking and New Physics at the TeV Scale webpage at World Scientific Publishing.

From The Planck Scale To The Weak Scale: Toward A Theory Of The Universe. Proceedings, Theoretical Advanced Study Institute In Elementary Particle Physics, Santa Cruz, Usa, June 23 - July 18, 1986. Vol. 2.
H.E. Haber, (Ed.) (UC, Santa Cruz). 1987.
Published in SINGAPORE, SINGAPORE: WORLD SCIENTIFIC (1987) 497-953
Detailed record

From The Planck Scale To The Weak Scale: Toward A Theory Of The Universe. Proceedings, Theoretical Advanced Study Institute In Elementary Particle Physics, Santa Cruz, Usa, June 23 - July 18, 1986. Vol. 1.
H.E. Haber, (Ed.). 1987.
Published in SINGAPORE, SINGAPORE: WORLD SCIENTIFIC (1987) 1-495
Detailed record

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V. Teaching

Winter 2015 Physics 218 Advanced Quantum Field Theory
Winter, 2015 Physics 205 Introduction to Research "Research on the Theory of the Terascale" [PDF | Powerpoint]
Fall 2014 Physics 171 General Relativity, Black Holes, and Cosmology
Spring, 2013 Physics 251 Group Theory and Modern Physics
Winter, 2013 Physics 214 Electromagnetism II
Fall, 2012 Physics 116C Mathematical Methods in Physics III
Spring, 2012 Physics 216 Advanced Topics in Non-Relativistic Quantum Mechanics
Winter, 2011 Physics 116A Mathematical Methods in Physics I
Fall 2009 Physics 139B Quantum Mechanics II
Winter, 2009 Physics 5B Introduction to Physics II
Winter, 2000 Physics 112 Thermodynamics and Statistical Mechanics

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VI. Notes and other writings

Toward a set of 2HDM benchmarks [PDF | PS]
The eigenvalues of the quadratic Casimir operator and second-order indices of a simple Lie algebra [PDF | PS]
Notes on the complex inverse trigonometric and hyperbolic functions and their principal values [PDF | PS]
Proof of a trace inequality in matrix algebra [PDF | PS]
Notes on the spontaneous breaking of SU(N) and SO(N) via a second-rank tensor multiplet [PDF | PS]
Notes on antisymmetric matrices and the pfaffian [PDF | PS]
Complex representation of scalar fields and the embedding of U(n) in SO(2n) [PDF | PS]
The probability that a product of random numbers is less than a fixed constant [PDF | PS]
Massless Majorana and Weyl fermions cannot be distinguished [PDF | PS]

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VII. Talks at conferences, workshops and schools, 2004--2014

2015 Conferences and workshops

SiD Workshop, January 2015 at SLAC, January 12, 2015 Higgs Physics and the ILC [PDF]

2014 Conferences and workshops

IFT Program on Physics Challenges in the face of LHC-14, Madrid, Spain, September 25, 2014 Constraints on the alignment limit of the MSSM Higgs sector [PDF]

IFT Program on Physics Challenges in the face of LHC-14, Madrid, Spain, September 23, 2014 Motivations for a stable scalar in an extended Higgs sector [PDF]

Higgs Days at Santander 2014, Santander, Spain, September 9, 2014 2HDM Benchmarks--Theoretical Framework [PDF]

Workshop on Multi-Higgs Models, Lisbon, Portugal, September 2, 2014 Constraints on the alignment limit of the MSSM Higgs sector [PDF]
SUSY 2014: The 22nd International Conference on Supersymmetry and Unification of Fundamental Interactions, Manchester, UK, July 22, 2014 Can the Hbb coupling be equal in magnitude to its SM value but opposite in sign? [PDF]
Workshop of the LHC Higgs Cross Section Working Group, CERN, June 13, 2014 2HDM---Report on recent activities [PDF]
Americas Workshop on Linear Colliders (AWLC14), Fermilab, May 15, 2014 Probing wrong-sign Yukawa couplings [PDF]
Americas Workshop on Linear Colliders (AWLC14), Fermilab, May 12, 2014 Higgs Physics [PDF]
KUTS Workshop (I), Precision SUSY Higgs Mass Calculation Initiative, Max-Planck-Institut für Physik, Munich, Germany, April 11, 2014 Some Issues for Precision Higgs Mass Computations [PDF]
Gunion Fest, University of California, Davis, March 28, 2014 Precision Higgs and Future Colliders [PDF | Powerpoint]
Bay Area Particle Theory Seminar, San Francisco, CA, March 14, 2014 Decoupling and Alignment in Light of the Higgs data [PDF].

Professional talks at conferences and workshops in previous years are stored here.

Schools and Pedagogical Lectures

The 40th SLAC Summer Institute, The Electroweak Scale: Unraveling the Mysteries at the LHC, 23 July--3 August 2012, Electroweak Symmetry Breaking (EWSB): The Basics [Lecture 1 | Lecture 2]

Idpasc Higgs School, Foz do Arelho, Portugal, 6--9 Sept 2011, Theory of Higgs Bosons: The Standard Model and Beyond [PDF]

The Pre SUSY school, preceding the 18th International Conference on Supersymmetry and Unification of Fundamental Interactions, Bonn, Germany, 19--21 August, 2010, Two-component Spinor Formalism: practical methods for treating Majorana fermions [PDF]

Spaatind 2010: Nordic Conference in Particle Physics Spaatind 2010, Spaatind, Norway, 2--8 January 2010, Introduction to Electroweak Symmetry Breaking [PDF]; Two-component spinor formalism [PDF]

Collider Phenomenology, DESY Theory Workshop, DESY Hamburg, Germany, 29 September--1 October 2009 Introduction to Electroweak Symmetry Breaking [PDF]

The CERN--Fermilab 2008 Hadron Collider Physics Summer School, Fermilab, August 12--22, 2008, Higgs Boson Theory and Phenomenology [PDF]

Pre-SUSY 2005, preceding the 13th International Conference on Supersymmetry and Unification of Fundamental Interactions, IPPP Durham, 29 June--July 15, 2005 Practical methods for treating Majorana fermions [PDF]

PSI Zuoz Summer School on Particle Physics, Zuoz, Switzerland, 15--21 August, 2004 Introduction to Supersymmetry [Lecture 1 |Lecture 2| Lecture 3| Lecture 4]

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VIII. 2015 Conferences and workshops in particle physics

2015 Zurich Phenomenology Workshop "The flavour of new physics" (ZPW2015) , January 7--9, 2015 at the Pauli Center for Theoretical Studies in Zurich, Switzerland

The 8th Workshop of LHC Higgs Cross Section Working Group, January 22--24, 2015 at CERN in Geneva, Switzerland

Aspen Center for Physics Winter Conference on Particle Physics: Exploring the Physics Frontier with Circular Colliders, January 26--February 1, 2015, in Aspen, CO [Scientific program]

Workshop on the Intermediate Neutrino Program (WINP2015), February 4--6, 2015 at Broohaven National Laboratory in Upton, NY

The 2nd Toyama International Workshop on "Higgs as a Probe of New Physics 2015" (HPNP2015), February 11--15, 2013, in Toyama, Japan

Aspen Center for Physics Winter Conference on Particle Physics: Progress and Applications of Modern Quantum Field Theory, February 16--21, 2015, in Aspen, CO [Scientific program]

Bay Area Particle Theory Seminar (BAPTS), March 13, 2015 at San Francisco State University (SFSU) in San Francisco, CA

XXVII Workshop Beyond the Standard Model, March 16--19, 2015 at the Physikzentrum in Bad Honnef, Germany

4th Workshop on "Implications of the 125 GeV Higgs boson", March 30--April 3, 2015 at LPSC in Grenoble, France

American Physical Society April Meeting, April 11--14, 2014 in Baltimore, MD

The 4th MCTP Spring Symposium on Higgs Boson Physics in the Standard Model and Beyond, April 20--22, 2015 at the University of Michigan in Ann Arbor, MI

International Workshop on Baryon & Lepton Number Violation, April 26--30, 2015 at the University of Massachusetts in Amherst, MA

Higgs Pair Production at Colliders, April 27--30, 2015 At MITP in Mainz, Germany

Phenomenology 2015 Symposium (PHENO 2015), May 4--6, 2015 in Pittsburgh, PA

Third KUTS meeting, May 18--20, 2015 at LPTHE in Paris, France

Twelfth Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2015), May 19--24, 2015 in Vail, Colorado

PLANCK 2015, May 26--30, 2014 in Ioannina, Greece

Les Houches Workshop Seris "Physics at TeV Colliders" 2015 Session (PhysTeV), June 1--19, 2015 at the Les Houches Center for Physics in Les Houches, France

Indirect Searches for New Physics in the LHC and Flavour Precision Era, June 1--26, 2015 at MIAPP in Munich, Germany

25th Workshop on Weak Interactions and Neutrinos, June 8--13, 2015 at MPIK in Heidelberg, Germany

2015 RADCOR--Loopfest, June 15--19, 2015 at UCLA in Los Angeles, CA

Invisibles 15 Workshop: "Invisibles Meets Visibles", June 22--26, 2015 in Madrid, Spain

Primordial Physics, June 21--July 12, 2015 at the Aspen Center for Physics in Aspen, CO

Anticipating 14 TeV: Insights into Matter from the LHC and Beyond, June 29--July 24, 2015 at MIAPP in Munich, Germany

From Scattering Amplitudes to the Conformal Bootstrap, July 5--26 at the Aspen Center for Physics in Aspen, CO

PASCOS-2015, June 29--July 3, 2015 at the ICTP in Trieste, Italy

EPS-HEP 2015 Conference, July 22--29, 2015 in Vienna, Austria

Neutrinos from Space and on Earth, July 26--August 16, 2015 at the Aspen Center for Physics in Aspen, CO

Higgs Hunting 2015, July 30--August 1, 2015 at LAL in Orsay, France

2015 Meeting of the APS Division of Particles and Fields (DPF 2015), August 4--8, 2015 in Ann Arbor, MI

New Directions to Shed Light on Dark Matter, August 9--September 13, 2015 at the Aspen Center for Physics in Aspen, CO

27th International Symposium on Lepton Photon Interactions at High Energies, August 17--22, 2015 in Ljubljana, Slovenia

Pre-SUSY Symposium 2015 August 17--21 in Davis, CA

The 23rd International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY 2015), August 23--29 at the Granlibakken Conference Center & Lodge in Tahoe City, CA

GGI Workshop: "Gearing up for LHC13", August 31--October 16, 2015 at the Galileo Galilei Institute for Theoretical Physics in Arcetri, Florence, Italy

Higgs Days at Santander 2015, September 14--18, 2015 in Santander, Spain

Listings of conferences and workshops from previous years are stored here.

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IX. University Service

Faculty Perceptions of a UCSC Research Environment in Need of Restoration and Improvement, a report by Howard E. Haber and David M. Harrington, sponsored by the UCSC Committee on Research and contributed in May, 1998 to the Advisory Report of the Millennium Committee. [HTML]

University Committee on Research Policy (UCORP) 1995--1996 Public web page.

Should UC renew its contract with the Department of Energy (DOE) to manage the Lawrence Livermore National Laboratory and Los Alamos National Laboratory? The following web page documents the 1996 UC systemwide campus debate on this question. A town meeting was held on the UCSC campus on March 7, 1996 to discuss these issues.

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X. Extracurricular Activities

Some of the physics students and I play softball in the UCSC intramural coed softball league. The fall season runs from early October to early December, and the spring season runs from early April to early June.

Our team, called Re-Entry, is sponsored by the STARS organization on campus, which provides support and counseling for returning (or re-entry) students to campus. You can follow our season exploits on the Re-Entry Team Webpage.

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XI. Physics, Math and Computer Links

Book Price comparisons

AddALL book search

CERN links

Large Hadron Collider (LHC)

LHC Physics Centre at CERN

LHC Performance and Statistics

LHC Programme Coordination web pages

ATLAS Online Luminosity [for more details click here]

CMS Online Luminosity [for more details click here]

Meetings and Conferences organized by SCIPP Theory

The search for Fundamental Physics: Higgs Bosons & Supersymmetry, A symposium in honor of Michael Dine and Howard Haber on the occasion of their 60th Birthdays, January 4--6, 2013

West Coast LHC Theory meeting, May 21, 2010

Confronting Challenges in Theoretical Physics, A Symposium in Honor of Tom Banks and Willy Fischler on the Occasion of their 60th Birthdays June 15--16, 2009

RADCOR 2000, 5th International Symposium on Radiative Corrections, September 11--15, 2000