arXiv subjects

J. -M. Frere

Publications and source records attributed to J. -M. Frere.

21 records · Page 2Linked to original sources

arXiv1998

Boron abundance and solar neutrino spectrum distortion

The presence of neutrinos from Boron decay in the flux observed on Earth is attested by the observation of their energy spectrum. Possible distortions of the spectrum investigated in current detectors are often interpreted in terms of evidence in favour or against various schemes of neutrino oscillations. We stress here that a distortion of the spectrum at high energies could also result from an increase in the ratio of neutrinos originating from ($^3$He+p) and $^8$B reactions. While a $^8$B neutrino depletion would contribute to this effect, an increase in the Hep contribution seems also needed to reproduce the preliminary data.

hep-ph↗

arXiv1996

Could the MSSM have no CP violation in the CKM matrix?

We show that all CP violation in the MSSM could originate in the supersymmetry breaking sector rather than the CKM matrix, and discuss the important consequences for $B$-physics.

hep-ph↗

arXiv1995

Phenomenological Evidence for the Gluon Content of $η$ and $η'$

We discuss the effect of $η$--$η'$ mixing and of axial current anomalies on various decay processes. We describe the 2$γ$ decays of $η$ and $η'$, the radiative decays of low-lying vector mesons as well as the decays $η\to 3π$, $J/ψ\toηγ$ and $J/ψ\toη'γ$ in one unified framework, in which they are related to the electromagnetic and strong axial current anomalies, respectively. We also discuss briefly the enhancement of $η'$ in $D_s$ decays and suggest a possible relation to gluon-mediated processes. The importance of the decays of the glueball candidates $f_0(1500)$ and $ f_0(1590)$ into $ηη'$ channels is also stressed.

hep-ph↗