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Author : Letizia Peruzzo
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (126 download)
Download or read book Search for Π0 --> Invisible Decays with the NA62 Experiment written by Letizia Peruzzo and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for B0 Decays to Invisible Final States and to Nu Nubar Gamma written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We establish upper limits on branching fractions for B[sup 0] decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for B[sup 0] decays to [nu][bar [nu]][gamma]. Within the Standard Model, these decays have branching fractions that are below current experimental sensitivity, but various models of physics beyond the Standard Model predict significant contributions from these channels. Using 88.5 million B[bar B] pairs collected at the [Upsilon](4S) resonance by the BABAR experiment at the PEP-II e[sup +]e[sup -] storage ring at the Stanford Linear Accelerator Center, we establish upper limits at the 90% confidence level of 22 x 10[sup -5] for the branching fraction of B[sup 0] [yields] invisible and 4.7 x 10[sup -5] for the branching fraction of B[sup 0] [yields] [nu][bar [nu]][gamma].
Author : Bruno Angelucci
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (955 download)
Download or read book Trigger for Rare Kaon Decays Searches at the CERN NA62 Experiment written by Bruno Angelucci and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joel Christopher Swallow
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Searches for Rare and Forbidden Kaon Decays at the NA62 Experiment at CERN. written by Joel Christopher Swallow and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marco Fabbrichesi
Publisher : Springer Nature
ISBN 13 : 3030625192
Total Pages : 85 pages
Book Rating : 4.0/5 (36 download)
Download or read book The Physics of the Dark Photon written by Marco Fabbrichesi and published by Springer Nature. This book was released on 2020-11-23 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about the dark photon which is a new gauge boson whose existence has been conjectured. Due to its interaction with the ordinary, visible photon, such a particle can be experimentally detected via specific signatures. In this book, the authors review the physics of the dark photon from the theoretical and experimental point of view. They discuss the difference between the massive and the massless case, highlighting how the two phenomena arise from the same vector portal between the dark and the visible sector. A review of the cosmological and astrophysical observations is provided, together with the connection to dark matter physics. Then, a perspective on current and future experimental limits on the parameters of the massless and massive dark photon is given, as well as the related bounds on milli-charged fermions. The book is intended for graduate students and young researchers who are embarking on dark photon research, and offers them a clear and up-to-date introduction to the subject.
Author : Lorenza Iacobuzio
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (128 download)
Download or read book Heavy Neutral Lepton Decay Searches at the NA62 Experiment at CERN. written by Lorenza Iacobuzio and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jonathan L. Rosner
Publisher : University of Chicago Press
ISBN 13 : 9780226902289
Total Pages : 654 pages
Book Rating : 4.9/5 (22 download)
Download or read book Kaon Physics written by Jonathan L. Rosner and published by University of Chicago Press. This book was released on 2001-01-15 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1947, the first of what have come to be known as "strange particles" were detected. As the number and variety of these particles proliferated, physicists began to try to make sense of them. Some seemed to have masses about 900 times that of the electron, and existed in both charged and neutral varieties. These particles are now called kaons (or K mesons), and they have become the subject of some of the most exciting research in particle physics. Kaon Physics at the Turn of the Millennium presents cutting-edge papers by leading theorists and experimentalists that synthesize the current state of the field and suggest promising new directions for the future study of kaons. Topics covered include the history of kaon physics, direct CP violation in kaon decays, time reversal violation, CPT studies, theoretical aspects of kaon physics, rare kaon decays, hyperon physics, charm: CP violation and mixing, the physics of B mesons, and future opportunities for kaon physics in the twenty-first century.
Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (16 download)
Download or read book A Search for Invisible Decays of the Upsilon(1S). written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We search for invisible decays of the?(1S) meson using a sample of 91.4 x 106?(3S) mesons collected at the BABAR/PEP-II B Factory. We select events containing the decay?(3S) →??−?(1S) and search for evidence of an undetectable?(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction?(?(1S) → invisible)
Author : John F. Donoghue
Publisher : Cambridge University Press
ISBN 13 : 1009291009
Total Pages : 599 pages
Book Rating : 4.0/5 (92 download)
Download or read book Dynamics of the Standard Model written by John F. Donoghue and published by Cambridge University Press. This book was released on 2023-01-31 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2014 edition, now OA, provides a detailed and practical account of the Standard Model of particle physics.
Author : Philipp Klose
Publisher : Presses universitaires de Louvain
ISBN 13 : 2390610021
Total Pages : 220 pages
Book Rating : 4.3/5 (96 download)
Download or read book Aspects of Bottom-up Hidden Sector Models written by Philipp Klose and published by Presses universitaires de Louvain. This book was released on 2020-11-26 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: The standard model (SM) of particle physics is a hugely successful theory of nature, but it is incomplete. E.g., it cannot explain finite SM neutrino masses or the origin of the primordial baryon asymmetry (BAU). One way to address such problems is to postulate the existence of new but hidden particles. This thesis studies such "hidden sectors" in two ways: 1) An effective theory approach, where electroweak (EW) and GeV scale portal effective theories (PETs) are constructed that couple the SM to a generic light hidden mediator of spin 0, 1⁄2, or 1. The EW scale PETs include all portal operators of dimension d≤5. The GeV scale PETs additionally include all leading order (LO) flavour changing portal operators of dimension d≤6,7. They are used to derive a LO PET chiral perturbation theory Lagrangian that describes hidden sector induced light meson transitions in fixed target experiments like NA62 or SHiP. 2) An investigation of the type-I seesaw model, which couples the SM to n≥2 sterile neutrinos that can generate a BAU via “leptogenesis”. It is shown that thermal and spectator effects can result in a sign-flip and strong relative enhancement of the BAU in high-scale leptogenesis with two hierarchical sterile neutrinos of vanishing initial abundance. Much lighter sterile neutrinos may be detected via lepton number violating (LNV) decays at colliders, but LNV decays could be suppressed relative to lepton number conserving decays for 't Hooft natural parameter choices. It is shown that the corresponding parameter space consists of three regions: (a)with unsuppressed LNV decays, (b)with suppressed LNV decays, (c)with suppressed and unsuppressed LNV decays.
Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (16 download)
Download or read book Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S). written by and published by . This book was released on 2010 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We search for single-photon decays of the?(1S) resonance,? →? + invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A°, or a pair of dark matter particles,?{bar?}. Both A° and {chi} are assumed to have zero spin. We tag?(1S) decays with a dipion transition?(2S) →??−?(1S) and look for events with a single energetic photon and significant missing energy. We find no evidence for such processes in the mass range m{sub A{sup o}} ≤ 9.2GeV and m{sub {chi}} ≤ 4.5GeV in the sample of 98 x 106?(2S) decays collected with the BABAR detector and set stringent limits on new physics models that contain light dark matter states.
Author : Jesko Friedrich Merkel
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (837 download)
Download or read book Search for the Decay B+ -> A+1K*0 at the BABAR Experiment written by Jesko Friedrich Merkel and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fred Jegerlehner
Publisher : Springer Science & Business Media
ISBN 13 : 3540726330
Total Pages : 433 pages
Book Rating : 4.5/5 (47 download)
Download or read book The Anomalous Magnetic Moment of the Muon written by Fred Jegerlehner and published by Springer Science & Business Media. This book was released on 2008 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the present state of knowledge of the anomalous magnetic moment a=(g-2)/2 of the muon. The muon anomalous magnetic moment is one of the most precisely measured quantities in elementary particle physics and provides one of the most stringent tests of relativistic quantum field theory as a fundamental theoretical framework. It allows for an extremely precise check of the standard model of elementary particles and of its limitations.
Author : Paolo Crivelli
Publisher :
ISBN 13 :
Total Pages : 131 pages
Book Rating : 4.:/5 (428 download)
Download or read book New Search for Invisible Decays of Ortho-positronium written by Paolo Crivelli and published by . This book was released on 2006 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : B. Lee Roberts
Publisher : World Scientific
ISBN 13 : 9814271845
Total Pages : 772 pages
Book Rating : 4.8/5 (142 download)
Download or read book Lepton Dipole Moments written by B. Lee Roberts and published by World Scientific. This book was released on 2010 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a self-contained description of the measurements of the magnetic dipole moments of the electron and muon, along with a discussion of the measurements of the fine structure constant, and the theory associated with magnetic and electric dipole moments. Also included are the searches for a permanent electric dipole moment of the electron, muon, neutron and atomic nuclei. The related topic of the transition moment for lepton flavor violating processes, such as neutrinoless muon or tauon decays, and the search for such processes are included as well. The papers, written by many of the leading authors in this field, cover both the experimental and theoretical aspects of these topics. Sample Chapter(s). Chapter 1: Historical Introduction to Electric and Mangnetic Moments (367 KB). Contents: Historical Introduction (B L Roberts); Electromagnetic Dipole Moments and New Physics (A Czarnecki & W J Marciano); Lepton g OCo 2 from 1947 to Present (T Kinoshita); Analytic QED Calculations of the Anomalous Magnetic Moment of the Electron (S Laporta & E Remiddi); Measurements of the Electron Magnetic Moment (G Gabrielse); Determining the Fine Structure Constant (G Gabrielse); Helium Fine Structure Theory for the Determination of (K Pachucki & J Sapirstein); Hadronic Vacuum Polarization and the Lepton Anomalous Magnetic Moments (M Davier); The Hadronic Light-by-Light Contribution to a, e (J Prades et al.); General Prescriptions for One-loop Contributions to a e, (K R Lynch); Measurement of the Muon ( g OCo 2) Value (J P Miller et al.); Muon ( g OCo 2) and Physics Beyond the Standard Model (D StAckinger); Probing CP Violation with Electric Dipole Moments (M Pospelov & A Ritz); The Electric Dipole Moment of the Electron (E D Commins & D DeMille); Neutron EDM Experiments (S K Lamoreaux & R Golub); Nuclear Electric Dipole Moments (W C Griffith et al.); EDM Measurements in Storage Rings (B L Roberts et al.); Models of Lepton Flavor Violation (Y Okada); Search for the Charged Lepton-Flavor-Violating Transition Moments l OaAE l OC (Y Kuno). Readership: Researchers and graduate students in particle physics, atomic physics and nuclear physics, as well as experts working in the field
Author : Georg G. Raffelt
Publisher : University of Chicago Press
ISBN 13 : 9780226702728
Total Pages : 692 pages
Book Rating : 4.7/5 (27 download)
Download or read book Stars as Laboratories for Fundamental Physics written by Georg G. Raffelt and published by University of Chicago Press. This book was released on 1996-05 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of what we know about neutrinos is revealed by astronomical observations, and the same applies to the axion, a conjectured new particle that is a favored candidate for the main component of the dark matter of the universe.
Author : Stefan Scherer
Publisher : Springer
ISBN 13 : 3642192548
Total Pages : 346 pages
Book Rating : 4.6/5 (421 download)
Download or read book A Primer for Chiral Perturbation Theory written by Stefan Scherer and published by Springer. This book was released on 2011-10-01 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiral Perturbation Theory, as effective field theory, is a commonly accepted and well established working tool, approximating quantum chromodynamics at energies well below typical hadron masses. This volume, based on a number of lectures and supplemented with additional material, provides a pedagogical introduction for graduate students and newcomers entering the field from related areas of nuclear and particle physics. Starting with the the Lagrangian of the strong interactions and general symmetry principles, the basic concepts of Chiral Perturbation Theory in the mesonic and baryonic sectors are developed. The application of these concepts is then illustrated with a number of examples. A large number of exercises (81, with complete solutions) are included to familiarize the reader with helpful calculational techniques.
