Download or read book Search for Baryon number and Lepton number Violating Decays of Hyperons Using the CLAS Detector at Jefferson Laboratory written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for ten baryon-number violating decay modes of ? hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single lepton in the final state (? → m?) and conserve either the sum or the difference of baryon and lepton number (? ± L). The tenth decay mode (? → p¯?+) represents a difference in baryon number of two units and no difference in lepton number. Furthermore, we observe no significant signal and set upper limits on the branching fractions of these reactions in the range (4 – 200) x 107 at the 90% confidence level.
Download or read book Search for Baryon number and Lepton number Violating Decays of Lambda Hyperons Using the CLAS Detector at Jefferson Laboratory written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for ten baryon-number violating decay modes of $\Lambda$ hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single lepton in the final state ($\Lambda \rightarrow m \ell$) and conserve either the sum or the difference of baryon and lepton number ($B \pm L$). The tenth decay mode ($\Lambda \rightarrow \bar{p}\pi^+$) represents a difference in baryon number of two units and no difference in lepton number. We observe no significant signal and set upper limits on the branching fractions of these reactions in the range $(4-200)\times 10^{-7}$ at the $90\%$ confidence level.
Download or read book Lepton and Baryon Number Violation in Particle Physics Astrophysics and Cosmology written by H. V. Klapdor-Kleingrothaus and published by CRC Press. This book was released on 1999-01-01 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together leading researchers from particle physics, astrophysics, and cosmology, Lepton and Baryon Number Violation in Particle Physics, Astrophysics and Cosmology presents reviews of current theoretical ideas, experimental results, and future perspectives in this topical field. The book covers areas related to baryon number (B) and lepton number (L) violation in particle physics, nuclear physics, rare decays, and cosmology. The main topics include B and L violation and grand unified theories; B and L violation in the early universe, cosmology, and astrophysics; Lepton family number violation; and B and L violation and collider physics.
Download or read book Search for the Baryon and Lepton Number Violating Decays Tau to Lambda H written by B. Aubert and published by . This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have searched for the violation of baryon number B and lepton number L in the (B-L)-conserving modes {tau}{sup -} {yields} {bar {Lambda}}{sup 0}{pi}{sup -} and {tau}{sup -} {yields} {bar {Lambda}}{sup 0}K{sup -} as well as the (B-L)-violating modes {tau}{sup -} {yields} {Lambda}{sup 0}{pi}{sup -} and {tau}{sup -} {yields} {Lambda}{sup 0}K{sup -} using 237 fb{sup -1} of data collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring. They do not observe any signal and determine preliminary upper limits on the branching fractions {Beta}({tau}{sup -} {yields} {bar {Lambda}}{sup 0}{pi}{sup -})
Download or read book SEARCH for Baryon and Lepton Number Violating Z0 Decays Extras written by G. ABBIENDI and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Search for Lepton and Baryon Number Violating Decays of the tau lepton written by Mark Charles Peterman and published by . This book was released on 1998 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Search for a Lepton number violating Decay of the Cascade minus Hyperon written by Durgaprasad Rajaram and published by . This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Searches for the Baryon and Lepton number Violating Decays B 0 rightarrow Lambda c ell B rightarrow Lambda ell and B rightarrow bar Lambda ell written by and published by . This book was released on 2011 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Searches for B mesons decaying to final states containing a baryon and a lepton are performed, where the baryon is either [Lambda]{sub c} or [Lambda] and the lepton is a muon or an electron. These decays violate both baryon and lepton number and would be a signature of physics beyond the standard model. No significant signal is observed in any of the decay modes, and upper limits in the range (3.2 - 520) x 10−8 are set on the branching fractions at the 90% confidence level.
Download or read book Paroisse Saint Th odore de Dompsure Ses Confr ries written by and published by . This book was released on 1877 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Baryon and Lepton Number Violation in the Standard Model at High Energy written by Los Alamos National Laboratory and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Excited Hyperons in Photoproduction at CLAS written by and published by . This book was released on 2014 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurement results of photoproduced excited hyperon states using the CLAS detector at Jefferson Lab are shown. The invariant mass distribution of the?(1405) has recently been shown to be different for each of the three Sigma pi channels that it decays to, showing that there is prominent interference between the isospin I=0 and I=1 isospin amplitudes. Measurements of the differential and total cross sections of the three hyperons?(1405),?°(1385), and Lambda(1520) are presented and compared. Prospects of future studies using a 12 GeV beam with the GlueX detector are briefly given.
Download or read book Search for Lepton Number Violating Processes in B to H L L Decays written by and published by . This book was released on 2012 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for the lepton-number violating processes B → h−l+l+ with h− = K−/?− and l+ = e+/?+, using a sample of 471 ± 3 million B{bar B} events collected with the BABAR detector at the PEP-II e+e− collider at the SLAC National Accelerator Laboratory. We find no evidence for these decays and place 90% confidence level upper limits on their branching fractions B (B+ →?−e+e+)
Download or read book A Dynamical Model for Non leptonic Decays of Hyperons written by Riazuddin and published by . This book was released on 1964 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Baryon Number Violation Beyond the Standard Model written by Bartosz Fornal and published by . This book was released on 2014 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes simple extensions of the standard model with new sources of baryon number violation but no proton decay. The motivation for constructing such theories comes from the shortcomings of the standard model to explain the generation of baryon asymmetry in the universe, and from the absence of experimental evidence for proton decay. However, lack of any direct evidence for baryon number violation in general puts strong bounds on the naturalness of some of those models and favors theories with suppressed baryon number violation below the TeV scale. The initial part of the thesis concentrates on investigating models containing new scalars responsible for baryon number breaking. A model with new color sextet scalars is analyzed in more detail. Apart from generating cosmological baryon number, it gives nontrivial predictions for the neutron-antineutron oscillations, the electric dipole moment of the neutron, and neutral meson mixing. The second model discussed in the thesis contains a new scalar leptoquark. Although this model predicts mainly lepton flavor violation and a nonzero electric dipole moment of the electron, it includes, in its original form, baryon number violating nonrenormalizable dimension-five operators triggering proton decay. Imposing an appropriate discrete symmetry forbids such operators. Finally, a supersymmetric model with gauged baryon and lepton numbers is proposed. It provides a natural explanation for proton stability and predicts lepton number violating processes below the supersymmetry breaking scale, which can be tested at the Large Hadron Collider. The dark matter candidate in this model carries baryon number and can be searched for in direct detection experiments as well. The thesis is completed by constructing and briefly discussing a minimal extension of the standard model with gauged baryon, lepton, and flavor symmetries.
Download or read book Searches for Exotic Baryon Number violating Processes at Super Kamiokande written by Volodymyr Takhistov and published by . This book was released on 2016 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various theoretical considerations suggest that baryon number should be violated. Nucleon decay, which typically appears within the context of unified theories, would provide a definitive signature of baryon number violation. In this dissertation, we report on the search results for p → e+ X, p →mu+ (where X is an invisible, massless particle), n → nugamma, p → e+ nunu, p → mu + nunu, np → e+ nu, np → mu+nu and np → tau +nu nucleon and dinucleon decays at the Super-Kamiokande experiment. Some of these searches are novel. Using data from a combined exposure of 273.4 kton·years and a chi2 spectral fitting technique, a search for these decays yields a result consistent with no signal.
Download or read book Search for the Lepton number violating Decay Xi P Mu Mu written by and published by . This book was released on 2005 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Beta Decay of Hyperons written by Augusto García and published by Springer. This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
