نتایج جستجو برای: muon
تعداد نتایج: 7546 فیلتر نتایج به سال:
We use the random phase approximation to describe the muon capture rate on Ca, Ca, Fe, Zr, and Pb. With Ca as a test case, we show that the continuum random phase approximation ~CRPA! and the standard RPA give essentially equivalent descriptions of the muon capture process. Using the standard RPA with the free nucleon weak form factors we reproduce the experimental total capture rates on these ...
The recent development of the intense pulsed muon source at J-PARC MUSE, Japan Proton Accelerator Research Complex/MUon Science Establishment (10(6) s(-1) for a momentum of 60 MeV/c), enabled us to pioneer a new frontier in analytical sciences. Here, we report a non-destructive elemental analysis using µ(-) capture. Controlling muon momentum from 32.5 to 57.5 MeV/c, we successfully demonstrate ...
Abstarct Recently BNL have measured the muon magnetic moment anomaly with increased precision. The world average experimental value at present shows a discrepancy of 43(16)× 10 from the Standard Model [SM] value. In this paper we investigate the implications of this difference on a class of scalar leptoquark interactions to SM quark-lepton pair. We find that for leptoquarks in the few hundred G...
We describe the design, construction and performance of the upgraded DØ muon system for Run II of the Fermilab Tevatron collider. Significant improvements have been made to the major subsystems of the DØ muon detector: trigger scintillation counters, tracking detectors, and electronics. The Run II central muon detector has a new scintillation counter system inside the iron toroid and an improve...
Beauty photoproduction in dijet events has been measured at HERA with the ZEUS detector using an integrated luminosity of 126 pb −1. Beauty was identified in events with a muon in the final state by using the transverse momentum of the muon relative to the closest jet. Lifetime information from the silicon vertex detector was also used; the impact parameter of the muon with respect to the prima...
Here we invoke the current and future perspective on muon g −2 measurement when asking what the muon g − 2 could tell about the underlying structure concerning with the hierarchy problem. Here we take up two such models, the presence of which turns out to alter the standard model prediction for muon g − 2 significantly: one is TeV scale gravity scenario, the other supersymmetric model, in the l...
Observations of atmospheric neutrinos by the SuperKamiokande collaboration have demonstrated large mixing of the muon-neutrino. However the present atmospheric neutrino data does not significantly constrain the associated mixing of the electron-neutrino, or the sign of the mass-squared difference. Here we identify the diagnostics for these quantities and they also test the theory of how matter ...
We study the possibility of measuring the muon Yukawa couplings in s-channel Higgs boson production at a muon collider with transversely polarized beams. We investigate sensitivity to the relative size of the CP-odd and CP-even muon Yukawa couplings. Provided the event rate observed justifies the operation of the μμ Higgs boson factory, we find that 40% polarization for both beams is sufficient...
A large area (128m) Muon Tracking Detector (MTD), located within the KASCADE experiment, has been built with the aim to identify muons (Eμ >0.8GeV) and their directions in extensive air showers by track measurements under more than 18 r.l. shielding. The orientation of the muon track with respect to the shower axis is expressed in terms of the radialand tangential angles. By means of triangulat...
Muon Storage Ring PRISM - FFAG to Improve a Sensitivity of μ - e Conversion Experiment Below 10 − 17
In experiments to search for the coherent neutrino-less conversion of a muon into an electron in the field of a nucleus, the characteristic of a muon beam can limit the achievable sensitivity. Two main limiting factors of the sensitivity, a backgrounds level and an energy resolution of the conversion electrons, are discussed for the MECO-type experiments. The PRISM/PRIME experiment is a solutio...
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