نتایج جستجو برای: hadron parity

تعداد نتایج: 42526  

Journal: :Physical review 2021

Inspired by the recent experimental results which show deviations from standard model predictions of $b\ensuremath{\rightarrow}s{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ transitions, we study $R$-parity violating minimal supersymmetric extended inverse seesaw mechanism. The trilinear terms, together with chiral mixing sneutrinos, induce loop contributions to anomaly. We param...

2000
Xiangdong Ji

We study the possibility of measuring parity-violating pion-nucleon coupling h (1) πNN from π+-electroproton production in the threshold region. We calculate the electronhelicity asymmetry in terms of h (1) πNN and the Z-boson exchange between the electron and proton in leading-order heavy-baryon chiral perturbation theory. From the result, we demonstrate that the coupling can be determined to ...

Journal: :Journal of High Energy Physics 2022

A bstract Non-Standard-Model parity violation may be occurring in LHC collisions. Any such would go unseen, however, as searches for it are not currently performed. One barrier to is the lack of model-independent methods sensitive all its forms. We remove this by demonstrating an effective and way search parity-violating physics at LHC. The method data-driven makes no reference any particular m...

1999
M. Ahmed T. Gehrmann

The distribution of hadrons produced in deeply inelastic electron–proton collisions depends on the azimuthal angle between lepton scattering plane and hadron production plane in the photon-proton centre-of-mass frame. In addition to the well known up-down asymmetry induced by the azimuthal dependence of the Born level subprocess, there is also a non-vanishing left-right asymmetry, provided the ...

2000
A. Yu. Ignatiev R. R. Volkas

The Mirror Matter or Exact Parity Model sees every standard particle, including the physical neutral Higgs boson, paired with a parity partner. The unbroken parity symmetry forces the mass eigenstate Higgs bosons to be maximal mixtures of the ordinary and mirror Higgs bosons. Each of these mass eigenstates will therefore decay 50% of the time into invisible mirror particles , providing a clear ...

1996
Howard Baer Chih-hao Chen Xerxes Tata

If R-parity is not conserved, the lightest supersymmetric particle (LSP) could decay via lepton number violating or baryon number violating interactions. The latter case is particularly insidious since it leads to a reduction of the E/T as well as leptonic signals for supersymmetry. We evaluate cross sections for jets plus E/T , 1`, 2` (same-sign and opposite sign) and 3` event topologies that ...

2005
A. Rajaraman F. Takayama

Symmetries are fundamental to our physical understanding of our Universe. In addition to continuous symmetries, there are discrete symmetries such as the charge conjugation symmetry C, parity P, and the time reversal symmetry T, which reverses the direction of time. We can also build other symmetries by taking products. For instance, CP is the product of the charge conjugation and parity and CP...

Journal: :Suplemento de la revista mexicana de física 2022

In this contribution, we summarize our recent studies on the chiral invariant mass and condensates in neutron star matter. We construct a unified equations of state assuming crossover phase transition from hadronic matter described by parity doublet model to quark an Nambu--Jona-Lasinio type model. first show that is constrained be $600\,\mbox{MeV}\, \lesssim\, m_0 \,\lesssim \, 900\,\mbox{MeV}...

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