9,915 research outputs found
Fermion-boson loops with bilinear R-parity violation leading to Majorana neutrino mass and magnetic moments
We present analytic expressions corresponding to a set of one loop Feynman
diagrams, built within R-parity violating (RpV) minimal supersymmetric standard
model (MSSM). Diagrams involve both bilinear and trilinear RpV couplings and
represent Majorana neutrino masses and magnetic moments.Comment: I've decided to move the collection of my papers to arXiv for easier
access. Proceedings of the Nuclear Physics Workshop in Kazimierz Dolny,
Poland, 200
The Higgs mass in the MSSM infrared fixed point scenario
In the infrared fixed point (IFP) scenario of the minimal supersymmetric
model (MSSM), the top-quark mass and other physical quantities of the
low-energy theory are insensitive to the values of the parameters of the theory
at some high energy scale. In this framework we evaluate the light CP-even
Higgs mass, , taking into account some important effects that had not been
previously considered. In particular, the supersymmetric correction to the
relation between the running and the physical top-quark masses lowers the value
of , thereby implying a lower predicted value of . Assuming a
supersymmetric threshold of TeV and GeV, we find an upper
bound of GeV; the most plausible value of lies somewhat
below the upper bound. This places the Higgs boson in the IFP scenario well
within the reach of the LEP-2 Higgs search.Comment: 18 pages, LaTeX, 5 ps figures, uses psfig.sty. Final version, some
comments and a figure added, references correcte
Relativistic Quantum Thermodynamics of Ideal Gases in 2 Dimensions
In this work we study the behavior of relativistic ideal Bose and Fermi gases
in two space dimensions. Making use of polylogarithm functions we derive a
closed and unified expression for their densities. It is shown that both type
of gases are essentially inequivalent, and only in the non-relativistic limit
the spinless and equal mass Bose and Fermi gases are equivalent as known in the
literature.Comment: 6 pages, 1 figur
Majorana neutrino magnetic moments
The presence of trilinear R-parity violating interactions in the MSSM
lagrangian leads to existence of quark-squark and lepton-slepton loops which
generate mass of the neutrino. By introducing interaction with an external
photon the magnetic moment is obtained. We derive bounds on that quantity being
around one order of magnitude stronger than those present in the literature.Comment: I've decided to move the collection of my papers to arXiv for easier
access. Proceedings of the Nuclear Physics Workshop in Kazimierz Dolny,
Poland, 200
CP sensitive observables in chargino production and decay into a W boson
We study CP sensitive observables in chargino production in electron-positron
collisions with subsequent two-body decay of one chargino into a W boson. We
identify the CP odd elements of the W boson density matrix and propose CP
sensitive triple-product asymmetries of the chargino decay products. We
calculate the density-matrix elements, the CP asymmetries and the cross
sections in the Minimal Supersymmetric Standard Model with complex parameters
\mu and M_1 for an e+ e- linear collider with \sqrt{s} = 800 GeV and
longitudinally polarized beams. The asymmetries can reach 7% and we discuss the
feasibility of measuring these asymmetries.Comment: 23 pages, 7 figure
Derivation of and in the Minimal Supersymmetric Standard Model
In the minimal supersymmetric standard model, the Higgs sector has two
unknown parameters, usually taken to be and ,
the mass of its one physical pseudoscalar particle. By minimizing the minimum
of the Higgs potential along a certain direction in parameter space, it is
shown that + radiative correction, and if one further plausible
assumption is made, .Comment: 7 pages, University of California, Riverside Report No. UCRHEP-T105
(Feb 1993). [Discussion of radiative correction is now included.
Presymmetry beyond the Standard Model
We go beyond the Standard Model guided by presymmetry, the discrete
electroweak quark-lepton symmetry hidden by topological effects which explain
quark fractional charges as in condense matter physics. Partners of the
particles of the Standard Model and the discrete symmetry associated with this
partnership appear as manifestations of a residual presymmetry and its
extension from matter to forces. This duplication of the spectrum of the
Standard Model keeps spin and comes nondegenerated about the TeV scale.Comment: 6 pages, 11 figures. To be published in the proceedings of DPF-2009,
Detroit, MI, July 2009, eConf C09072
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