11,630 research outputs found
CPsuperH2.3: an Updated Tool for Phenomenology in the MSSM with Explicit CP Violation
We describe the Fortran code CPsuperH2.3, which incorporates the following
updates compared with its predecessor CPsuperH2.0. It implements improved
calculations of the Higgs-boson masses and mixing including stau contributions
and finite threshold effects on the tau-lepton Yukawa coupling. It incorporates
the LEP limits on the processes e^+ e^- to H_i Z, H_i H_j and the CMS limits on
H_i to tau^+ tau^- obtained from 4.6/fb of data at a centre-of-mass energy of 7
TeV. It also includes the decay mode H_i to Z gamma and the Schiff-moment
contributions to the electric dipole moments of Mercury and Radium225, with
several calculational options for the case of Mercury. These additions make
CPsuperH2.3 a suitable tool for analyzing possible CP-violating effects in the
MSSM in the era of the LHC and a new generation of EDM experimentsComment: 31 pages, 10 eps figures, 7 tables; H to Z gamma and SM BRs included;
To appear in CPC; Typos in Eq.(A.2) corrected;The program may be obtained
from http://www.hep.man.ac.uk/u/jslee/CPsuperH.html, or by contacting the
first author at [email protected]; A comment added after Eq.(15) and a typo in
Eq.(A.4) correcte
CP Violation in Heavy MSSM Higgs Scenarios
We introduce and explore new heavy Higgs scenarios in the Minimal
Supersymmetric Standard Model (MSSM) with explicit CP violation, which have
important phenomenological implications that may be testable at the LHC. For
soft supersymmetry-breaking scales M_S above a few TeV and a charged Higgs
boson mass M_H+ above a few hundred GeV, new physics effects including those
from explicit CP violation decouple from the light Higgs boson sector. However,
such effects can significantly alter the phenomenology of the heavy Higgs
bosons while still being consistent with constraints from low-energy
observables, for instance electric dipole moments. To consider scenarios with a
charged Higgs boson much heavier than the Standard Model (SM) particles but
much lighter than the supersymmetric particles, we revisit previous
calculations of the MSSM Higgs sector. We compute the Higgs boson masses in the
presence of CP violating phases, implementing improved matching and
renormalization group (RG) effects, as well as two-loop RG effects from the
effective two-Higgs Doublet Model (2HDM) scale M_H+ to the scale M_S. We
illustrate the possibility of non-decoupling CP-violating effects in the heavy
Higgs sector using new benchmark scenarios named CPX4LHC.Comment: 39 pages, 17 figures, LaTeX, typos correcte
B-Meson Observables in the Maximally CP-Violating MSSM with Minimal Flavour Violation
Additional sources of CP violation in the MSSM may affect B-meson mixings and
decays, even in scenarios with minimal flavour violation (MFV). We formulate
the maximally CP-violating and minimally flavour-violating (MCPMFV) variant of
the MSSM, which has 19 parameters, including 6 phases that violate CP. We then
develop a manifestly flavour-covariant effective Lagrangian formalism for
calculating Higgs-mediated FCNC observables in the MSSM at large tan(beta), and
analyze within the MCPMFV framework FCNC and other processes involving B
mesons. We include a new class of dominant subleading contributions due to
non-decoupling effects of the third-generation quarks. We present illustrative
numerical results that include effects of the CP-odd MCPMFV parameters on Higgs
and sparticle masses, the B_s and B_d mass differences, and on the decays B_s
--> mu+ mu-, B_u --> tau nu and b --> s gamma. We use these results to derive
illustrative constraints on the MCPMFV parameters imposed by D0, CDF, BELLE and
BABAR measurements of B mesons, demonstrating how a potentially observable
contribution to the CP asymmetry in the b --> s gamma decay may arise in the
MSSM with MCPMFV.Comment: 47 pages, 8 eps figures, comments and references added, accepted for
publication in Physical Review D, Eq.(3.2) correcte
Neurohormonal functioning and sexual orientation: A theory of homosexuality–heterosexuality.
Recommendations for HER2 testing in the UK
Determining the HER2 status of breast carcinomas is a prerequisite for the use of the monoclonal antibody trastuzumab (Herceptin(R)), which has recently been licensed for the treatment of metastatic disease. This necessitates a test based on archival material. The preferred analyses are immunohistochemistry with fluorescent in situ hybridisation (FISH) as a follow up test for ambiguous results. Guidelines have been developed for standardised, well controlled procedures for the provision of reliable results. A group of three reference laboratories has been established to provide advice, quality assurance, and materials, where needed
Colliders and Cosmology
Dark matter in variations of constrained minimal supersymmetric standard
models will be discussed. Particular attention will be given to the comparison
between accelerator and direct detection constraints.Comment: Submitted for the SUSY07 proceedings, 15 pages, LaTex, 26 eps figure
Higgs Phenomenology with CPsuperH
The MSSM contains CP-violating phases that may have important observable
effects in Higgs physics. We review recent highlights in Higgs phenomenology
obtained with the code CPsuperH, a useful tool for studies of the production,
mixing and decay of a coupled system of the neutral Higgs bosons at future high
energy colliders such as the LHC, ILC (LC), and a muon collider (MC).
CPsuperH implements the constraints from upper limits on electric dipole
moments, and may be extended to include other related low-energy observables,
such as b -> s \gamma and B -> K l l, and to compute the relic abundance of the
lightest neutralino.Comment: 20 pages, LaTeX, 7 figures, invited article by Modern Physics Letters
A (review section
A Geometric Approach to CP Violation: Applications to the MCPMFV SUSY Model
We analyze the constraints imposed by experimental upper limits on electric
dipole moments (EDMs) within the Maximally CP- and Minimally Flavour-Violating
(MCPMFV) version of the MSSM. Since the MCPMFV scenario has 6 non-standard
CP-violating phases, in addition to the CP-odd QCD vacuum phase \theta_QCD,
cancellations may occur among the CP-violating contributions to the three
measured EDMs, those of the Thallium, neutron and Mercury, leaving open the
possibility of relatively large values of the other CP-violating observables.
We develop a novel geometric method that uses the small-phase approximation as
a starting point, takes the existing EDM constraints into account, and enables
us to find maximal values of other CP-violating observables, such as the EDMs
of the Deuteron and muon, the CP-violating asymmetry in b --> s \gamma decay,
and the B_s mixing phase. We apply this geometric method to provide upper
limits on these observables within specific benchmark supersymmetric scenarios,
including extensions that allow for a non-zero \theta_QCD.Comment: 34 pages, 16 eps figures, to appear in JHE
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