7 results on '"SEMILEPTONIC DECAY [CHARMED PARTICLE]"'
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2. Joint angular decay distributions in exclusive weak decays of heavy mesons and baryons
- Author
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Bialas, P., Körner, J. G., Krämer, M., and Zalewski, K.
- Subjects
bottom particle: cascade decay ,charmed particle: nonleptonic decay ,amplitude analysis [helicity] ,bottom particle: nonleptonic decay ,effect: polarization ,charmed particle [semileptonic decay] ,effect [polarization] ,mass: lepton ,spin [interference] ,cascade decay: bottom particle ,formula ,charmed particle [nonleptonic decay] ,nonleptonic decay [bottom particle] ,mass [lepton] ,bottom particle: semileptonic decay ,semileptonic decay [charmed particle] ,bottom particle [cascade decay] ,interference [spin] ,lepton [mass] ,charmed particle: semileptonic decay ,cascade decay [bottom particle] ,ddc:530 ,decay: angular distribution ,nonleptonic decay: charmed particle ,numerical calculations ,polarization: effect ,lepton: mass ,helicity: amplitude analysis ,charmed particle: cascade decay ,semileptonic decay: bottom particle ,tables ,semileptonic decay [bottom particle] ,bottom particle [nonleptonic decay] ,semileptonic decay: charmed particle ,interference: spin ,nonleptonic decay: bottom particle ,angular distribution: decay ,nonleptonic decay [charmed particle] ,cascade decay [charmed particle] ,bottom particle [semileptonic decay] ,angular distribution [decay] ,decay [angular distribution] ,polarization [effect] ,cascade decay: charmed particle ,spin: interference ,charmed particle [cascade decay] - Abstract
41 pp. (1993)., We present the results of a comprehensive analysis of the angular decay distributions occurring in the weak exclusive decays of the lowest lying charm and bottom mesons and baryons. We deal with both semileptonic and nonleptonic decays and discuss various decay channels and their subsequent cascade decay chains including lepton mass effects. In the case of baryons we include polarization effects for the parent charm or bottom baryon. We list in table form general formulae which allow one to write down the joint angular decay distributions for the cascade decaysA→B(→b1+...+bn)+C(→c1+...+cn), for all spin casessA≤1/2 andsB,sC≤3/2 for the prominent decays ofB andC. Two examples involving meson and baryon decays are discussed in detail.
- Published
- 1993
- Full Text
- View/download PDF
3. Experimental Study of Inclusive Muon Spectra at PETRA
- Author
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Adeva, B., Barber, D. P., Chang, C. C., Chen, H. S., Chen, M., Chen, M. L., Chen, M. Y., Chu, Y. S., Clare, R., Deffur, E., Demarteau, M., Duinker, P., Becker, U., Feng, Z. Y., Fesefeldt, H. S., Fong, D., Fukushima, M., Harting, D., Hebbeker, T., Herten, G., Ho, M. C., Ilyas, M. M., Jiang, D. Z., Berdugo, J., Krenz, W., Kuijer, P., Li, Q. Z., Luckey, David, Luit, E. J., Mana, C., Marquina, M. A., Massaro, G. G. G., Mount, R., Newman, H., Berghoff, G., Pohl, M., Poschmann, F. P., Rau, R. R., Revol, J. P., Rodriguez, S., Rohde, M., Rubio, J. A., Rykaczewski, H., Salicio, J., Schulz, I., Bohm, A., Sinram, K., Steuer, M., Swider, G. M., Tang, H. W., Teuchert, D., Ting, Samuel C. C., Tung, K. L., Wang, M. Q., White, M., Wu, H. G., Branson, J. G., Wu, S. X., Wyslouch, B., Zhou, B., Zhu, R. Y., Zhu, Y. C., Aachen-DESY-Annecy, Burger, J. D., Capell, M., and Cerrada, M.
- Subjects
BRANCHING RATIO [BOTTOM PARTICLE] ,MUON [ELECTROPRODUCTION] ,FRAGMENTATION [QUARK] ,SEARCH FOR: NEW PARTICLE ,MASS [LOWER LIMIT] ,DESY PETRA STOR ,+2JET+MUON%22">ELECTRON POSITRON --> 2JET MUON ,LOWER LIMIT [MASS] ,BOTTOM PARTICLE [SEMILEPTONIC DECAY] ,ddc:550 ,MUON: ELECTROPRODUCTION ,THRUST [JET] ,BOTTOM PARTICLE: SEMILEPTONIC DECAY ,JET: THRUST ,SEMILEPTONIC DECAY [CHARMED PARTICLE] ,JET [ELECTROPRODUCTION] ,SEMILEPTONIC DECAY [BOTTOM PARTICLE] ,SEARCH FOR: HIGGS PARTICLE ,COLLIDING BEAMS [ELECTRON POSITRON] ,ELECTRON POSITRON: INCLUSIVE REACTION ,ELECTROPRODUCTION: JET ,SEMILEPTONIC DECAY: CHARMED PARTICLE ,HIGGS PARTICLE [SEARCH FOR] ,ELECTRON POSITRON: COLLIDING BEAMS ,BRANCHING RATIO [CHARMED PARTICLE] ,MASS: LOWER LIMIT ,ELECTROPRODUCTION [JET] ,SPECTRUM: TRANSVERSE MOMENTUM ,QUARK: FRAGMENTATION ,SEMILEPTONIC DECAY: BOTTOM PARTICLE ,SEARCH FOR: HEAVY LEPTON ,TRANSVERSE MOMENTUM: SPECTRUM ,ELECTROPRODUCTION: MUON ,CHARMED PARTICLE: BRANCHING RATIO ,CHARMED PARTICLE [SEMILEPTONIC DECAY] ,33.00-38.54 GEV-CMS ,BOTTOM PARTICLE: BRANCHING RATIO ,MOMENTUM SPECTRUM ,ELECTROPRODUCTION [MUON] ,heavy quark ,COLLIDING BEAMS: ELECTRON POSITRON ,EXPERIMENTAL RESULTS ,SPECTRUM [TRANSVERSE MOMENTUM] ,JET: ELECTROPRODUCTION ,ELECTRON POSITRON [COLLIDING BEAMS] ,INCLUSIVE REACTION [ELECTRON POSITRON] ,CHARMED PARTICLE: SEMILEPTONIC DECAY ,NEW PARTICLE [SEARCH FOR] ,TRANSVERSE MOMENTUM [SPECTRUM] ,MARK J ,HEAVY LEPTON [SEARCH FOR] ,LOWER LIMIT: MASS - Abstract
(1983). doi:10.1103/PhysRevLett.51.443, The results of a high-statistics study of inclusive muon spectra at PETRA are reported. Improved mass limits have been obtained for heavy quarks, heavy leptons, and charged Higgs particles. It is shown that the fragmentation properties of b quarks and c quarks are different, with the mean fragmentation variables 〈zb〉=0.75±0.03±0.06, 〈zc〉=0.46±0.02±0.05 and the average semileptonic branching ratio for the B and C hadrons R(B)=(10.5±1.5±1.3)%, R(C)=(11.5±1.0±1.7)%.
- Published
- 1983
- Full Text
- View/download PDF
4. On the origin of inclusive electron events in $e^+ e^-$ annihilation between 3.6-GeV and 5.2-GeV
- Author
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Brandelik, R., Braunschweig, W., Gadermann, E., Hultschig, H., Joos, P., Koch, W., Kotz, U., Krehbiel, H., Kreinick, D., Lynch, H. L., McNeely, W. A., Moffeit, K. C., Martyn, H.-U., Notz, D., Rusch, R., Schliwa, M., Wiik, B. H., Wolf, G., Grindhammer, Guenter, Ludwig, J., Mess, K. H., Petersen, A., Poelz, G., Sander, H. G., Ringel, J., Romer, O., Sauerberg, K., Schmueser, Peter, de Boer, W., Buschhorn, G., Fues, W., von Gagern, C., Gunderson, B., Kotthaus, R., Schmitz, D., Lierl, H., Oberlack, H., Orito, S., Suda, T., Totsuka, Y., Yamada, S., DASP Collaboration, Sturm, W., Wallraff, W., Cords, D., Felst, R., and Fries, R.
- Subjects
ELECTRON [FINAL STATE] ,K: MULTIPLE PRODUCTION ,+ELECTRON+ANYTHING%22">ELECTRON POSITRON --> ELECTRON ANYTHING ,MULTIPLE PRODUCTION: PI ,RATIO [MULTIPLE PRODUCTION] ,MULTIPLE PRODUCTION: K ,DASP [MAGNETIC DETECTOR] ,ddc:530 ,K [MULTIPLE PRODUCTION] ,COLLIDING BEAMS: ELECTRON POSITRON ,EXPERIMENTAL RESULTS ,ELECTRON: FINAL STATE ,FINAL STATE [ELECTRON] ,SEMILEPTONIC DECAY [CHARMED PARTICLE] ,DESY DORIS STOR ,3.6-5.2 GEV-CMS ,MULTIPLICITY [ELECTRON] ,MULTIPLE PRODUCTION [K] ,ELECTRON POSITRON: INCLUSIVE REACTION ,PI: MULTIPLE PRODUCTION ,COLLIDING BEAMS [ELECTRON POSITRON] ,ANNIHILATION: ELECTRON POSITRON ,ELECTRON POSITRON [COLLIDING BEAMS] ,INCLUSIVE REACTION [ELECTRON POSITRON] ,FINAL STATE: ELECTRON ,ELECTRON POSITRON: COLLIDING BEAMS ,CHARMED PARTICLE: SEMILEPTONIC DECAY ,MULTIPLE PRODUCTION: RATIO ,ELECTRON POSITRON [ANNIHILATION] ,PI [MULTIPLE PRODUCTION] ,ELECTRON: MULTIPLICITY ,ANNIHILATION [ELECTRON POSITRON] ,MULTIPLE PRODUCTION [PI] ,High Energy Physics::Experiment ,MAGNETIC DETECTOR: DASP ,ELECTRON POSITRON: ANNIHILATION - Abstract
(1977). doi:10.1016/0370-2693(77)90360-4, The multiplicity distribution of inclusive electron events above 4 GeV cm energy shows two distinct classes of events: two prong no photon and high multiplicity events. If the high multiplicity events are attributed to the semi-leptonic decay of charmed particles the two prong no photon events must come from the weak decay of a different type of particle. The charged K to π ratio was measured for these events. The average number of charged kaons is 0.07 ± 0.06 per two prong event and 0.90 ± 0.18 per multiprong event. Thus the weak current responsible for the low multiplicity events has a small coupling to strange particles.
- Published
- 1977
5. COMMENTS ON THE DIFFERING LIFETIMES OF CHARMED HADRONS
- Author
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Ruckl, R.
- Subjects
QUARK: INTERFERENCE ,W [EXCHANGE] ,DECAY [EXCLUSIVE REACTION] ,TWO-PARTICLE [FINAL STATE] ,NONLEPTONIC DECAY [CHARMED PARTICLE] ,INTERFERENCE [QUARK] ,TALK ,CHARMED PARTICLE [SEMILEPTONIC DECAY] ,NONLEPTONIC DECAY: CHARMED PARTICLE ,TWO-PARTICLE: FINAL STATE ,INCLUSIVE REACTION: DECAY ,W: EXCHANGE ,FINAL STATE: TWO-PARTICLE ,LIFETIME [CHARMED PARTICLE] ,CHARMED PARTICLE [NONLEPTONIC DECAY] ,DECAY: EXCLUSIVE REACTION ,EXCLUSIVE REACTION [DECAY] ,SEMILEPTONIC DECAY [CHARMED PARTICLE] ,FINAL STATE [TWO-PARTICLE] ,SEMILEPTONIC DECAY: CHARMED PARTICLE ,EXCLUSIVE REACTION: DECAY ,EXCHANGE: W ,DECAY [INCLUSIVE REACTION] ,EXCHANGE [W] ,CHARMED PARTICLE: SEMILEPTONIC DECAY ,CHARMED PARTICLE: NONLEPTONIC DECAY ,EXPANSION 1/N ,DECAY: INCLUSIVE REACTION ,INCLUSIVE REACTION [DECAY] ,CHARMED PARTICLE: LIFETIME ,FACTORIZATION - Abstract
4 pp. (1986).
- Published
- 1986
6. Weak decays of charmed particles and heavy leptons
- Author
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Walsh, T. F.
- Subjects
SEXTET DOMINANCE [MODEL] ,ELECTRON MUON: UNIVERSALITY ,D0 ANTI-D0 [INTERFERENCE] ,NONLEPTONIC DECAY [CHARMED PARTICLE] ,BIBLIOGRAPHY ,LEPTON: OCTET ,CHARM [SELECTION RULE] ,SELECTION RULE: CHARM ,HEAVY LEPTON [LEPTONIC DECAY] ,INTERACTION: NEUTRINO NUCLEON ,NEUTRINO/L ,INTERACTION [NEUTRINO NUCLEON] ,LAMBDA: POLARIZATION ,HADRON: WEAK CURRENT ,CABIBBO ANGLE [WEAK INTERACTION] ,ELECTROPRODUCTION: CHARMED PARTICLE ,SEMILEPTONIC DECAY [CHARMED PARTICLE] ,WEAK INTERACTION: CURRENT ,QUARK ,STRANGENESS [SELECTION RULE] ,LEPTONIC DECAY [HEAVY LEPTON] ,ANNIHILATION: ELECTRON POSITRON ,NEUTRINOPRODUCTION [CHARMED PARTICLE] ,CHARMED PARTICLE: NEUTRINOPRODUCTION ,CHARMED PARTICLE: ELECTROPRODUCTION ,SYMMETRY: SU(3) X SU(3) ,NEUTRINO NUCLEON: INTERACTION ,LAMBDA [POLARIZATION] ,ELECTRON POSITRON [ANNIHILATION] ,INTERFERENCE: D0 ANTI-D0 ,ANNIHILATION [ELECTRON POSITRON] ,OCTET [LEPTON] ,QUANTUM NUMBER: LEPTON ,NEUTRINO NUCLEON [INTERACTION] ,WEAK INTERACTION: CABIBBO ANGLE ,LAMBDA/C(2260) [NEW PARTICLE] ,SYMMETRY: SU(2) X U(1) ,POLARIZATION [LAMBDA] ,NEW PARTICLE: LAMBDA/C(2260) ,LECTURES ,TAU(1900) [NEW PARTICLE] ,SU(2) X U(1) [SYMMETRY] ,NONLEPTONIC DECAY: CHARMED PARTICLE ,LEPTONIC DECAY: HEAVY LEPTON ,BRANCHING RATIO [HEAVY LEPTON] ,HEAVY LEPTON: LEPTONIC DECAY ,HEAVY LEPTON: SEMILEPTONIC DECAY ,CHARMED PARTICLE [NONLEPTONIC DECAY] ,SEMILEPTONIC DECAY [HEAVY LEPTON] ,MODEL: SEXTET DOMINANCE ,POLARIZATION: LAMBDA ,HEAVY LEPTON: BRANCHING RATIO ,CURRENT [WEAK INTERACTION] ,UNIVERSALITY [ELECTRON MUON] ,SU(3) X SU(3) [SYMMETRY] ,CHARMED PARTICLE: SEMILEPTONIC DECAY ,CHARMED PARTICLE: NONLEPTONIC DECAY ,CHARMED PARTICLE [ELECTROPRODUCTION] ,LEPTON [QUANTUM NUMBER] ,ELECTROPRODUCTION [CHARMED PARTICLE] ,SELECTION RULE: STRANGENESS ,WEAK CURRENT [HADRON] ,NEW PARTICLE: TAU(1900) ,ELECTRON POSITRON: ANNIHILATION - Abstract
14 pp. (1977).
- Published
- 1977
7. Charm Search and Lepton-Kaon Correlation in e+ e- Annihilation
- Author
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Yang, T. C. and Ali, Ahmed
- Subjects
K: FINAL STATE ,+CHARMED+PARTICLE%28K+LEPTON%29+ANYTHING%22">ELECTRON POSITRON --> CHARMED PARTICLE(K LEPTON) ANYTHING ,FINAL STATE: LEPTON ,ANGULAR CORRELATION [ELECTRON K] ,K: ENERGY SPECTRUM ,MASS SPECTRUM [ELECTRON K] ,K [ENERGY SPECTRUM] ,THRESHOLD: CHARMED PARTICLE ,MULTIPLICITY: CHARGED PARTICLE ,NUMERICAL CALCULATIONS ,ENERGY SPECTRUM: K ,LEPTON K [CORRELATION] ,CHARMED PARTICLE [THRESHOLD] ,CORRELATION: LEPTON K ,TOTAL CROSS SECTION: RATIO ,K [FINAL STATE] ,ELECTRON K: MASS SPECTRUM ,SEMILEPTONIC DECAY [CHARMED PARTICLE] ,ENERGY SPECTRUM [ELECTRON] ,ELECTRON: ENERGY SPECTRUM ,ELECTRON POSITRON: INCLUSIVE REACTION ,LEPTON: FINAL STATE ,LEPTON [FINAL STATE] ,FINAL STATE [K] ,ANNIHILATION: ELECTRON POSITRON ,INCLUSIVE REACTION [ELECTRON POSITRON] ,PROPOSED EXPERIMENT ,ENERGY SPECTRUM: ELECTRON ,CHARMED PARTICLE: SEMILEPTONIC DECAY ,RATIO [TOTAL CROSS SECTION] ,ELECTRON POSITRON [ANNIHILATION] ,FINAL STATE [LEPTON] ,CHARGED PARTICLE [MULTIPLICITY] ,ANNIHILATION [ELECTRON POSITRON] ,ELECTRON [ENERGY SPECTRUM] ,ENERGY SPECTRUM [K] ,ELECTRON POSITRON: ANNIHILATION ,FINAL STATE: K ,ELECTRON K: ANGULAR CORRELATION - Abstract
16 pp. (1976).
- Published
- 1976
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