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First Observation of Fully Reconstructed B0 and Bs0 Decays into Final States Involving an Excited Neutral Charm Meson in LHCb

First Observation of Fully Reconstructed B0 and Bs0 Decays into Final States Involving an Excited Neutral Charm Meson in LHCb
Author: Arnau Brossa Gonzalo
Publisher: Springer Nature
Total Pages: 241
Release: 2023-01-31
Genre: Science
ISBN: 3031227530
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This book presents the latest results on the branching fraction and phase space distribution of B0 and Bs0 decays into final states including excited neutral charm mesons. This work represents four years of research, and the book describes in detail all the necessary steps and techniques required to perform a physics analysis of the data recorded by the LHCb experiment in the years 2016–2018. Although the results presented in this book represent the first measurement of such decays, the text is written in a manner accessible to Ph.D. students and early career researchers. Thus, all the contents included in this book are described in a pedagogical way, including technical details that would allow the results to be reproduced in future. In addition to the methodology used to perform these measurements, the book also includes a description of the theoretical background required to interpret the results presented, as well as a technical description of the LHCb detector, which provided the data sample used in this study.

Sensitivity to the Decay of Bs Mesons Into Two Muons at Lhcb

Sensitivity to the Decay of Bs Mesons Into Two Muons at Lhcb
Author: Marc-Olivier Bettler
Publisher: LAP Lambert Academic Publishing
Total Pages: 208
Release: 2010-07
Genre:
ISBN: 9783838358529
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The probability of occurrence (branching fraction) of the yet-unobserved decay of Bs mesons into two muons is currently considered as one of the most stringent tests for the existence of physics beyond the Standard Model (SM) of particle physics. There exists indeed a large unexplored range between the current experimental upper limit and the SM prediction about this branching fraction, making a measurement incompatible with the SM possible. Furthermore, there exist predictions for this branching fraction in the frame of numerous theoretical models that aim at a more accurate description of matter than that offered by the Standard Model. Some of those predictions significantly differ from the SM one, opening the possibility of an indirect discovery of New Physics. LHCb is the CERN experiment primarily dedicated to the study of the quark b. This book addresses the sensitivity of the LHCb experiment to this branching fraction using Monte-Carlo simulations. It is shown that LHCb will compete with the current exclusion limit of the Bs to mu mu branching fraction already with the data recorded in 2010.

Rare B Decays from the CDF Experiment

Rare B Decays from the CDF Experiment
Author:
Publisher:
Total Pages:
Release: 1998
Genre:
ISBN:
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The high cross-section for the production of b quarks at the Tevatron hadron collider make it an ideal place to search for rare B meson species and very low branching fraction decay modes of the more common B mesons. This paper reports the recent discovery of the Bc meson by the CDF collaboration. It also discusses the observation of rare B meson final states involving?(2S) mesons and searches for ultra-rare decays such as B 2!??−

A Search for B Meson Decay to a Muon, a Neutrino, and a Photon

A Search for B Meson Decay to a Muon, a Neutrino, and a Photon
Author: Michael G. Greene
Publisher:
Total Pages: 167
Release: 2006
Genre:
ISBN:
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This thesis describes a search for the rare decay B + {yields} mu+numugamma, performed at the Stanford Linear Accelerator Center. The BABAR detector is used to analyze 81.65 fb{sup -1} of data, with (88.6 {+-} 0.6) x 10{sup 6} charged B meson decays, from the PEP-II e{sup +}e{sup -} collider running at the Upsilon(4S) resonance. The background estimate for the analysis is three events, and three signal candidates are observed. An upper limit on the branching fraction is set at B (B+ {yields} mu +numugamma)