Search for Baryons with Two Charm Quarks
Author | : Mark Edward Mattson |
Publisher | : |
Total Pages | : 0 |
Release | : 2002 |
Genre | : |
ISBN | : |
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Author | : Mark Edward Mattson |
Publisher | : |
Total Pages | : 0 |
Release | : 2002 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 161 |
Release | : 2007 |
Genre | : |
ISBN | : |
In this dissertation I describe a study of double-charm and charm-strange baryons based on data collected with the BABAR Detector at the Stanford Linear Accelerator Center. In this study I search for new baryons and make precise measurements of their properties and decay modes. I seek to verify and expand upon double-charm and charm-strange baryon observations made by other experiments. The BABAR Detector is used to measure subatomic particles that are produced at the PEP-II storage rings. I analyze approximately 300 million e+e- → c{bar c} events in a search for the production of double-charm baryons. I search for the double-charm baryons?{sub cc} (containing the quarks ccd) and?{sup ++}{sub cc} (ccu) in decays to?+{sub c}K−?+ and?+{sub c}K−?+?+, respectively. No statistically significant signals for their production are found, and upper limits on their production are determined. Statistically significant signals for excited charm-strange baryons are observed with my analysis of approximately 500 million e+e- → c{bar c} events. The charged charm-strange baryons?{sub c}(2970)+,?{sub c}(3055)+,?{sub c}(3123)+ are found in decays to?+{sub c}K−?+, the same decay mode used in the?+{sub cc} search. The neutral charm-strange baryon?{sub c}(3077)° is observed in decays to?+{sub c}K?−. I also search for excited charm-strange baryon decays to?+{sub c}K8,?+{sub c}K−,?+{sub c}K8?−?+, and?+{sub c}K−?−?+. No significant charm-strange baryon signals a f h these decay modes. For each excited charm-strange baryon state that I observe, I measure its mass, natural width (lifetime), and production rate. The properties of these excited charm-strange baryons and their decay modes provide constraints for phenomenological models of quark interactions through quantum chromodynamics. My discovery of the two new charm-strange baryons?{sub c}(3055)+ and?{sub c}(3123)+ influences our theoretical understanding of charm-strange baryon states.
Author | : Adam Jacob Edwards |
Publisher | : |
Total Pages | : 168 |
Release | : 2007 |
Genre | : |
ISBN | : |
Author | : Andrew Pickering |
Publisher | : University of Chicago Press |
Total Pages | : 484 |
Release | : 1999-12 |
Genre | : History |
ISBN | : 9780226667997 |
Widely regarded as a classic in its field, Constructing Quarks recounts the history of the post-war conceptual development of elementary-particle physics. Inviting a reappraisal of the status of scientific knowledge, Andrew Pickering suggests that scientists are not mere passive observers and reporters of nature. Rather they are social beings as well as active constructors of natural phenomena who engage in both experimental and theoretical practice. "A prodigious piece of scholarship that I can heartily recommend."—Michael Riordan, New Scientist "An admirable history. . . . Detailed and so accurate."—Hugh N. Pendleton, Physics Today
Author | : Moshe Gai |
Publisher | : |
Total Pages | : 506 |
Release | : 1993 |
Genre | : SCIENCE |
ISBN | : 9789814536950 |
Author | : Bimal Bhattarai |
Publisher | : |
Total Pages | : 106 |
Release | : 2005 |
Genre | : Baryons |
ISBN | : |
Author | : Aneesh V. Manohar |
Publisher | : Cambridge University Press |
Total Pages | : 205 |
Release | : 2023-07-31 |
Genre | : Science |
ISBN | : 1009402145 |
Author | : Dietmar W Menze |
Publisher | : World Scientific |
Total Pages | : 894 |
Release | : 1999-06-18 |
Genre | : |
ISBN | : 9814543772 |
This volume encompasses current issues in the physics of baryons, including their spectroscopy and quark-gluon substructure, and investigations with electroweak and strong interacting probes. The topics covered are: Baryon and Meson Spectroscopy, Chiral Physics, Heavy Quarks, Deep Inelastic Scattering, Form Factors and Exclusive Processes, Hadron-Nucleon Interaction, Hadrons in Nuclear Medium, and Special Topics in the First and Second Resonance, as well as a special part on the current status of neutrino physics. Each topic begins with an Introduction and Overview so as to make the more specialized papers readily accessible to non-experts.
Author | : Atsushi Hosaka |
Publisher | : World Scientific |
Total Pages | : 389 |
Release | : 2001 |
Genre | : Science |
ISBN | : 9810246293 |
This book describes baryon models constructed from quarks, mesons and chiral symmetry. The role of chiral symmetry and of quark model structure with SU(6) spin-flavor symmetry are discussed in detail, starting from a pedagogic introduction. Emphasis is placed on symmetry aspects of the theories. As an application, the chiral bag model is studied for nucleon structure, where important methods of theoretical physics, mostly related to the semiclassical approach for a system of strong interactions, are demonstrated. The text is more practical than formal; tools and ideas are explained in detail while solving actual problems. By checking each step of the computations, readers can learn not only the calculational techniques but also the essential ideas behind them.
Author | : Jian Liu |
Publisher | : |
Total Pages | : 128 |
Release | : 2007 |
Genre | : Baryons |
ISBN | : |