Author :
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Page : pages
File Size : 23,81 MB
Release : 1997
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Hybrid charmonium with mass (approximately) 4 GeV could be produced via a c{anti c} color-octet component in b --> c{anti c}s. These states could be narrow and could have a significant branching ratio to light hadrons, perhaps enhanced by glueballs. Decays to gluonic hadrons could make a sizable contribution to B --> no charm decays. Experimental signatures and search strategies are discussed.
Author : Frank Close
Publisher :
Page : pages
File Size : 27,43 MB
Release : 1997
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Author : Per Lasse Reinertsen
Publisher :
Page : 510 pages
File Size : 39,30 MB
Release : 1999
Category : Hadrons
ISBN :
Author : Denis A. Suprun
Publisher :
Page : 98 pages
File Size : 23,21 MB
Release : 2004
Category : B mesons
ISBN :
Author : Shigeki Misawa
Publisher :
Page : 568 pages
File Size : 36,52 MB
Release : 1997
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Author :
Publisher :
Page : 4 pages
File Size : 26,43 MB
Release : 2011
Category :
ISBN :
I report on recent measurements from the Belle and BABAR collaborations on the decay of the B meson to hadronic final states without a charm quark. The study of the branching fractions and angular distributions of B meson decays to hadronic final states without a charm quark probes the dynamics of both the weak and strong interactions, and plays an important role in understanding CP Violation (CPV) in the quark sector. CP Violation at the B factories is described graphically by a triangle with sides formed from the CKM matrix elements V{sub qd}V*{sub qb} (q = u, c, t) and internal angles [alpha], [beta] [gamma] (or [phi]2, [phi]1, [phi]3). Discrepancies in the measured values of the sides and angles could be an indication of New Physics beyond the Standard Model (SM) due to enhanced branching fractions or modified CP asymmetries. The experimental measurements of branching fractions, CP asymmetries, polarization and phases (both weak and strong) can be compared to theoretical models based on, for example, QCD factorization, SU(3) symmetry and Lattice QCD.
Author :
Publisher :
Page : 4 pages
File Size : 17,95 MB
Release : 2008
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We present CDF results on the branching fractions and time-integrated direct CP asymmetries for Bd, Bs and Lb decay modes into pairs of charmless charged hadrons (pions, kaons and protons). The data-set for these measurements amounts to 1fb−1 of p{bar p} collisions at a center of mass energy 1.96TeV. We report on the first observation of the Bs->Kpi, Lb-ppi and Lb->pK decay modes and on the measurement of their branching fractions and direct CP asymmetries.
Author :
Publisher :
Page : 264 pages
File Size : 22,76 MB
Release : 2013
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This work of thesis will investigate the heavy flavor sector, involving decays of particles containing the most massive quarks. In particular, we will study the bhadrons, that means particles containing b-quarks. The topic of this work is the measurements of B and CP asymmetries of two-body charmless decays of neutral b-hadrons, (B0 (s) → h+h' - and [Lambda]0 b →and ph -, where the h can be a pion or a kaon) collectively called B → h+h' -. Next sections describe the theoretical framework in which the b-hadrons are included. Firstly, it is necessary to introduce the CKM matrix describing the electroweak interactions between quarks and how the phenomenon of the CP violation manifests itself.
Author : Daniel O'Hanlon
Publisher : Springer
Page : 225 pages
File Size : 11,2 MB
Release : 2018-11-02
Category : Science
ISBN : 3030022064
This book highlights two essential analyses of data collected during the LHCb experiment, based on the Large Hadron Collider at CERN. The first comprises the first observation and studies of matter-antimatter asymmetries in two three-body b-baryon decays, paving the way for more precise measurements of the relatively unknown decay properties of b-baryon decays. The second is an analysis of a charged B meson decay to three charged pions, where previously large matter-antimatter asymmetries were observed in a model-independent analysis. Here a model of the decay amplitude is constructed using the unitarity-conserving ‘K-matrix’ model for the scalar contributions, so as to gain an understanding of how the previously observed matter-antimatter asymmetries arise; further, the model’s construction yields the most precise and comprehensive study of this decay mode to date.
Author : Sheldon Stone
Publisher : World Scientific Publishing Company
Page : 232 pages
File Size : 32,30 MB
Release : 2022
Category : Science
ISBN : 9789811251290
The Standard Model (SM) of particle physics has withstood thus far every attempt by experimentalists to show that it does not describe data. We discuss the SM in some detail, focusing on the mechanism of fermion mixing, which represents one of its most intriguing aspect. We discuss how this mechanism can be tested in b-quark decays, and how b decays can be used to extract information on physics beyond the SM. We review experimental techniques in b physics, focusing on recent results and highlighting future prospects. Particular attention is devoted to recent results from b decays into a hadron, a lepton and an anti-lepton, that show discrepancies with the SM predictions -- the so-called B-physics anomalies -- whose statistical significance has been increasing steadily. We discuss these experiments in a detailed manner, and also provide theoretical interpretation of these results in terms of physics beyond the SM.
