Author
P. Heusi
Bio: P. Heusi is an academic researcher from Los Alamos National Laboratory. The author has contributed to research in topics: Branching fraction & Particle decay. The author has an hindex of 8, co-authored 10 publications receiving 252 citations.
Topics: Branching fraction, Particle decay, Muon, Lepton, Quantum chromodynamics
Papers
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TL;DR: A search with the Crystal Box detector shows no evidence for the lepton-family-number-nonconserving decays, and upper limits for the branching ratios of GAMMA are provided.
Abstract: A search with the Crystal Box detector shows no evidence for the lepton-family-number-nonconserving decays ..mu -->..e..gamma.., ..mu -->..e..gamma gamma.., or ..mu -->..eee. The search provides upper limits for the branching ratios of GAMMA(..mu -->..e..gamma..)/GAMMA(..mu -->..evv-italic-bar) ..e..gamma gamma..)/GAMMA(..mu -->..evv-italic-bar) ..eee)/GAMMA(..mu -->..evv-italic-bar)<3.510/sup -11/ (90% C.L.). In addition, a limit for the emission of a light scalar or pseudoscalar boson in radiative muon decay is given.
122 citations
TL;DR: This Letter reports a new experimental search for the family-number-nonconserving decay ..mu../sup +/ ..-->.. e/Sup +/..gamma... There is no evidence for the presence of this decay mode.
Abstract: This Letter reports a new experimental search for the family-number-nonconserving decay ..mu../sup +/ ..-->.. e/sup +/..gamma... There is no evidence for the presence of this decay mode. The upper limit for the branching ratio is GAMMA(..mu.. ..-->.. e..gamma..)/GAMMA(..mu.. ..-->.. enu anti nu) < 4.9 x 10/sup -11/ (90% C.L.). 13 refs., 3 figs.
33 citations
30 citations
TL;DR: From a maximum-likelihood analysis of the Dalitz-plot distribution of 2364 coincident and random events, a unique value is obtained for ..gamma.., the ratio of the axial-vector to vector weak pion form factors, of 0.12.
Abstract: A new experiment studying radiative pion decay, ..pi../sup +/..-->..e/sup +/..nu../sub e/..gamma.., has been performed with the Crystal Box detector at the Clinton P. Anderson Meson Physics Facility. From a maximum-likelihood analysis of the Dalitz-plot distribution of 2364 coincident and random events, we obtain a unique value for ..gamma.., the ratio of the axial-vector to vector weak pion form factors, of 0.25 +- 0.12. The new world average is ..gamma.. -- 0.39 +- 0.06. .AE
29 citations
TL;DR: In this article, the branching ratio of B/sub mu3e/m3e was investigated and eleven such events were observed, all of which agree in number and spectra with expectations based on standard electroweak theory.
Abstract: A search has been performed for the muon-number--violating decay ..mu -->..e/sup +/e/sup +/e/sup -/. No candidate event has been found, the result yielding an upper limit for the branching ratio of B/sub mu3e/ ..e/sup +/e/sup +/e/sup -/..nu../sub e/nu-bar/sub ..mu../ events, eleven such events were observed. They agree in number and spectra with expectations based on standard electroweak theory.
18 citations
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TL;DR: In this paper, the authors survey the low-energy phenomenological implications of superstring-inspired E 6 models and present experimental limits on these particles from both accelerator and non-accelerator data.
827 citations
KEK1
TL;DR: In this article, the current theoretical and experimental status of the field of muon decay and its potential to search for new physics beyond the standard model is reviewed, together with the recent up-to-date motivations of lepton flavor violation based on supersymmetric models.
Abstract: This article reviews the current theoretical and experimental status of the field of muon decay and its potential to search for new physics beyond the standard model. The importance of rare muon processes with lepton flavor violation is highly stressed, together with precision measurements of normal muon decay. Recent up-to-date motivations of lepton flavor violation based on supersymmetric models, in particular supersymmetric grand unified theories, are described along with other theoretical models. Future prospects of experiments and muon sources of high intensity for further progress in this field are also discussed.
604 citations
TL;DR: In this article, a detailed analysis of simplified models is presented for the correlation between the muon anomalous magnetic moment (g − 2 ) and the quest for lepton flavor violation are intimately correlated.
502 citations
University of Maryland, College Park1, University of Southampton2, Autonomous University of Madrid3, Oklahoma State University–Stillwater4, University of Valencia5, Fermilab6, Northwestern University7, State University of Campinas8, University of Regina9, Stanford University10, Physical Research Laboratory11, Academia Sinica12, University of Pennsylvania13, Max Planck Society14, Amherst College15, Sapienza University of Rome16, Pennsylvania State University17, University of California, Berkeley18, CERN19, University of California, Los Angeles20, International School for Advanced Studies21, Bulgarian Academy of Sciences22, University of Manchester23, University of Florida24, Technische Universität München25, Yale University26, Virginia Tech27, Carnegie Mellon University28
TL;DR: A review of neutrino mass physics can be found in this paper, where the authors summarize what can be learned about neutrinos interactions as well as the nature of new physics beyond the Standard Model from various proposed Neutrino experiments.
Abstract: This paper is a review of the present status of neutrino mass physics, which grew out of an APS sponsored study of neutrinos in 2004. After a discussion of the present knowledge of neutrino masses and mixing and some popular ways to probe the new physics implied by recent data, it summarizes what can be learned about neutrino interactions as well as the nature of new physics beyond the Standard Model from the various proposed neutrino experiments. The intriguing possibility that neutrino mass physics may be at the heart of our understanding of a long standing puzzle of cosmology, i.e. the origin of matter?antimatter asymmetry is also discussed.
496 citations
TL;DR: In this paper, the flavour violating parameters of the low energy theory are derived in both SU(5) and SO(10) theories, and are used to calculate the rate for μ → eγ.
314 citations