Search for excited neutrinos from Z0 decays
نویسندگان
چکیده
منابع مشابه
Search for Excited Neutrinos at Hera
A search for excited neutrinos produced in electron–proton collisions is performed using a data sample corresponding to an integrated luminosity of 114 pb recently collected by the H1 detector at HERA. In absence of a signal, the measurement is interpreted within a minimal model parameterised in terms of couplings and compositness scale. New parameter regions, beyond other colliders sensitiviti...
متن کاملSearch for long-lived massive neutrinos in Z decays.
We search for events in the Mark II detector at SLC with the topology of a 2 boson decaying into a pair of long-lived, massive particles. No events that are consistent with the search hypothesis are found. Interpreting the long-lived particle as a sequential Dirac neutrino v4 of the fourth generation, we exclude at the 95% confidence level a significant range of mixing matrix elements of v4 to ...
متن کاملSearch for Majorana neutrinos in B- → π+ μ- μ- decays.
A search for heavy Majorana neutrinos produced in the B- → π+ μ- μ- decay mode is performed using 3 fb(-1) of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV at the LHC. Neutrinos with masses in the range 250 to 5000 MeV and lifetimes from zero to 1000 ps are probed. In the absence of a signal, upper limits are set on the branch...
متن کاملDecays of supernova neutrinos
Supernova neutrinos could be well-suited for probing neutrino decay, since decay may be observed even for very small decay rates or coupling constants. We will use a combined description of neutrino decay and neutrino oscillations for supernova neutrinos, especially taking into account two properties: One is the radially symmetric neutrino flux, allowing a decay product to be re-directed toward...
متن کاملAxial Anomaly Effects in Pion and Z0 Radiative Decays
We discuss a connection between axial anomaly and polarized radiative processes. By comparison with the corresponding unpolarized cases, we consider some physical outputs for the π+ and Z0 polarized radiative decays. We analyse in detail the pattern of mass singularity cancellation. PACS 11.30.Rd, 13.20.Cz, 11.15.Bt
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1990
ISSN: 0370-2693
DOI: 10.1016/0370-2693(90)90582-q