7,999 research outputs found
Triple and quartic interactions of Higgs bosons in the two-Higgs-doublet model with CP violation
We consider the two-Higgs-doublet model with explicit CP-violation, where the
effective Higgs potential is not CP-invariant at the tree-level. Three neutral
Higgs bosons of the model are the mixtures of CP-even and CP-odd bosons which
exist in the CP-conserving limit of the theory. The mass spectrum and
tree-level couplings of the neutral Higgs bosons to gauge bosons and fermions
are significantly dependent on the parameters of the Higgs boson mixing matrix.
We calculate the Higgs-gauge boson, Higgs-fermion, triple and quartic Higgs
self-interactions in the MSSM with explicit CP-violation in the Higgs sector
and CP-violating Yukawa interactions of the third generation scalar quarks. In
some regions of the MSSM parameter space substantial changes of the
self-interaction vertices take place, leading to significant suppression or
enhancement of the multiple Higgs boson production cross sections.Comment: 29 pages, 4 figures. Minor changes in section 3, misprints in (47)
corrected. Version accepted by EPJ
CompHEP 4.4 - Automatic Computations from Lagrangians to Events
We present a new version of the CompHEP program (version 4.4). We describe
shortly new issues implemented in this version, namely, simplification of quark
flavor combinatorics for the evaluation of hadronic processes, Les Houches
Accord based CompHEP-PYTHIA interface, processing the color configurations of
events, implementation of MSSM, symbolical and numerical batch modes, etc. We
discuss how the CompHEP program is used for preparing event generators for
various physical processes. We mention a few concrete physics examples for
CompHEP based generators prepared for the LHC and Tevatron.Comment: The paper has been presented on IX International Workshop on Advanced
Computing and Analysis Techniques in Physics Research December 1-5, 2003.
KEK, Japan. 10 pages, 2 figure
The entropy of the square-well fluid. II. The mean spherical approximation
The semi-analytical expression of the entropy is obtained for the square-well fluid within the mean spherical approximation. © 2013 Vladimir Filippov et al
The entropy of the square-well fluid. I. The random phase approximation
The analytical expression of the entropy is obtained for the square-well fluid within the random phase approximation. © 2013 Nikolay Dubinin et al
A simple way for obtaining the expression for the entropy of fluid. II. The random phase approximation
The more simple technique is used to obtain the analytical expression of the entropy for the square-well fluid in the random phase approximation. © 2013 Anatoliy Yuryev et al
A simple way for obtaining the expression for the entropy of fluid. III. The mean spherical approximation
The more simple technique is used to obtain the analytical expression of the entropy for the square-well fluid in the mean spherical approximation. © 2013 Vladimir Filippov et al
A simple way for obtaining the expression for the entropy of fluid. I. The general consideration
The more simple technique is used to obtain the analytical expression of the entropy for the hard-core fluid in a general case. © 2013 Anatoliy Yuryev et al
Search for Higgs Boson at LHC in the Reaction pp->gamma+gamma+jet at a Low Luminosity
We discuss the SM Higgs discovery potential of the LHC in the channel
pp->H+jet->gamma+gamma+jet when the jet is observed at sufficiently high Pt and
a small rapidity to be reliably identified. We calculate all the signal
subprocesses and the irreducible background with realistic kinematical cuts.
The reducible QCD background is also estimated. We conclude that the channel
gamma+gamma+jet can give about 120-200 signal events for Higgs mass MH=100-140
GeV at the integrated luminosity of 30 inverse fb. This signal rate should be
compared with only 330-600 events for the irreducible background per two-photon
invariant mass interval of 2 GeV. We estimate the QCD reducible background at
the level of 20% of the irreducible one. Thus, one may hope that the Higgs
boson can be discovered already during the LHC operation at a low luminosity.
At a high luminosity the observation of several hundreds of high Pt Higgs
bosons in this channel will be possible with significance higher than 15 for
L=100 inverse fb.Comment: 21 pages (LaTeX code, epsf.sty), 2 tables, 9 figures; to appear in
the Proceedings of XIIth International Workshop on High Energy Physics and
Quantum Field Theory (QFTHEP-97), Samara, Russia, September 4-10, 199
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