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New Physics Working Group Summary of LCWS2000 at FNAL
Here I summarize P5-WG (New/Alternative Physics Working Group) of
LCWS2000@FNAL, held on Oct 24-28, 2000. There were 13 talks altogether, 7 talks
on collider signals from new particles/interactions and 6 talks on extra
dimensional physics. We had very active and hot discussions among participants
for those new/alternative physics/ideas.Comment: New/Alternative Physics Working Group Summary, talk given at
LCWS2000@FNAL, Oct. 2000. (12 pages, 2 figures
Sensitivity bounds on heavy neutrino mixing and from LHCb upgrade
Decays of heavy pseudoscalar mesons , , and at LHCb
upgrade are considered, which produce either two equal sign muons or taus. In
addition, we consider the analogous decays with opposite sign muons or taus.
All these decays are considered to be mediated by a heavy on-shell neutrino
. Such decays of mesons, if not detected, will give in general stringent
upper bounds on the heavy-light mixing parameter as a function
of the neutrino mass GeV, principally due to the large expected
number of produced mesons . While some of the decays of the other mentioned
mesons are attractive due to a weaker CKM-suppression, the expected produced
number of such mesons is significantly smaller that that of 's; therefore,
the sensitivity bounds from such decays are in general comparable or less
restrictive. When pairs are produced, only two types of such decays are
significant: (and
), giving us stringent upper bounds on
; the other decays with a pair of , such as (and ), are
prohibited or very suppressed by kinematics.Comment: 13 pages, 4 figures; the paper is a continuation of our work
arXiv:1705.09403; v4: improved legends in Fig.
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