Download or read book Soft Gluon Effects in Nonleptonic Decays of Charmed Mesons written by and published by . This book was released on 1980 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft-gluon effects in nonleptonic decays of D and F mesons are studied nonperturbatively by use of a QCD multipole expansion. For reasonable values of D-meson bound-state parameters, the soft-gluon effects lead to a significant difference in the lifetimes of the D° and D mesons.
Download or read book Soft gluon Effects in Charmed meson Decays written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In D°- and F-meson decays, QCD effects are expected to activate W-exchange processes (quark-annihilation processes), as shown in Figs. 2 and 3, which by themselves are strongly suppressed because of helicity mismatch. For example, the D° meson, on gluon emission, can flip its spin so that the subsequent weak decay proceeds without helicity suppression. Hard-gluon emission from the D° meson, evaluated perturbatively, enhances the D° decay rate (by approx. 20%). Soft-gluon emission is an equally likely source of enhancements in charmed-meson decays, and indeed seems to be the dominant one. This soft-gluon effect in charmed-meson decays was studied by a nonperturbative method that has theoretical foundations in QCD. The basic tool is a multipole expansion in QCD. The analysis is divided into three steps: virtual color-fluctuation of charmed mesons, separation of long-distance and short-distance phenomena by use of QCD multipole expansion, and evaluation of the soft-gluon effect.
Download or read book Gluon effects in charmed meson decays written by H. C. Lee and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Energy Electron positron Physics written by Ahmed Ali and published by World Scientific. This book was released on 1988 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the termination of the physics program at PETRA, and with the start of TRISTAN and the SLC and later LEP, an era of e+e- physics has come to an end and a new one begins. The field is changing from a field of few specialists, to becoming one of the mainstream efforts of the high energy community. It seems appropriate at this moment to summarize what has been learned over the past years, in a way most useful to any high energy physicists, in particular to newcomers in the e+e- field. This is the purpose of the book. This book should be used as a reference for future workers in the field of e+e- interactions. It includes the most relevant data, parametrizations, theoretical background, and a chapter on detectors.
Download or read book Flavor Mixing in Weak Interactions written by Ling-Lie Chau and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 50-year history of weak interaction since Fermi's pro posal of this coupling has been marked with striking direct inter plays between experimental results and theoretical understanding, e.g. the discoveries of neutrinos, parity violation, and CP vio lation. The recent discoveries of the quark hierarchy, the charm and the beauty, and the intermediate vector bosons W± and ZO have truly made a splendid page in the history of particle physics. It is the purpose of this conference to discuss the questions of quark and lepton generations and mixing, their relations to CP violation, and to ask the questions about what are inside the quarks and the leptons in view of the present and future exper imental situation. Dr. Ling-Lie Chau Brookhaven National Laboratory Upton, New York vii ACKNOWLEDGMENTS I would like to thank all the Advisory and Organizing Committee members for their advice and suggestions during the organization of the conference. The running of the conference could not have gone so smoothly without the help of many participants, I sincerely thank: L. Becker, F.J. Botella, S. Gentile, P. Le Comte, M.E. Machacek, L. Lanceri, W.M. Morse, F.J. Olness, Y.-X. Pham, G. Poulard, K.J. Sliwa, and J.N. Webb.
Download or read book Weak Non leptonic Decays of Charmed Mesons in QCD Sum Rules written by B. I︠U︡ Blok and published by . This book was released on 1986 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elementary Particles written by N. Cabibbo and published by Elsevier. This book was released on 1987-01-01 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elementary Particles
Download or read book Study of Double Charm B Decays with the LHCb Experiment at CERN and Track Reconstruction for the LHCb Upgrade written by Renato Quagliani and published by Springer. This book was released on 2018-11-04 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the study of double charm B decays and the first observation of B0->D0D0Kst0 decay using Run I data from the LHCb experiment. It also describes in detail the upgrade for the Run III of the LHCb tracking system and the trigger and tracking strategy for the LHCb upgrade, as well as the development and performance studies of a novel standalone tracking algorithm for the scintillating fibre tracker that will be used for the LHCb upgrade. This algorithm alone allows the LHCb upgrade physics program to achieve incredibly high sensitivity to decays containing long-lived particles as final states as well as to boost the physics capabilities for the reconstruction of low momentum particles.
Download or read book Hyperons Charm and Beauty Hadrons written by Calvin S. Kalman and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weak Interactions of Leptons and Quarks written by Eugene D. Commins and published by Cambridge University Press. This book was released on 1983-07-29 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the study of weak interaction and its relationship with the other fundamnetal interactions of nature has progressed rapidly. Weak interactions of leptons and quarks provides an up-to-date account of this continuing research. The Introduction discusses early models and historical developments in the understanding of the weak force. The authors then give a clear presentation of the modern theoretical basis of weak interactions, going on to discuss recent advances in the field. These include development of the eletroweak gauge theory, and the discovery of neutral currents and of a host of new particles. There is also a chapter devoted entirely to neutrino astrophysics. Its straightforward style and its emphasis on experimental results will make this book an excellent source for students (problem sets are included at the end of each chapter) and experimentalists in the field. Physicists whose speciality lies outside the study of elementary particle physics will also find it useful.
Download or read book Particle Physics Phenomenology Proceedings Of The Iv International Workshop written by Wei Shu Hou and published by World Scientific. This book was released on 1999-09-29 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume covers many aspects of the latest developments in B physics (exclusive and inclusive charmless B decays), CP violation within and beyond the Standard Model, perturbative QCD and its application to B physics, spin physics, and supersymmetry phenomenology.
Download or read book Hyperons Charm and Beauty Hadrons written by and published by . This book was released on 2001 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weak Non leptonic Decays of Charmed Mesons written by B. I︠U︡ Blok and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Signal ai a informat s ii a written by and published by . This book was released on 1991 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonleptonic Decays of Charm Mesons written by Rodney Lennart Greene and published by . This book was released on 1995 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amplitude analyses of the $Dsp{+}$, $Dsbsp{s}{+} to Ksp{+}Ksp{-}pisp{+}$ and $Dsp{+}$, $Dsbsp{s}{+} to pisp{+}pisp{+}pisp{-}$ Dalitz plots are presented using data collected by the Fermilab high energy photoproduction experiment E687. Our data are fit to a model consisting of a sum of constant and Breit-Wigner amplitudes for the intermediate three-body nonresonant and two-body resonant decay modes. We extract decay fractions and relative phases. These results are used to infer new branching ratios for the $Dsp{+} to phipisp{+}$ and $Dsp{+} to overline{K}sp*$(892)$sp{0}Ksp{+}$ channels.
