Search for the Production of a New Quark Flavor at the c.m.-System Energies between 33 and 35.8 GeV

Authors :: Barber, D. P.
Becker, U.
Chen, M.
Cheng, C. P.
Chu, Y. S.
Clare, R.
Duinker, P.
Fang, G. Y.
Fesefeldt, H.
Fong, D.
Fukushima, M.
Guo, J. C.
Benda, H.
Hariri, A.
Herten, G.
Ho, M. C.
Hsu, H. K.
Hsu, T. T.
Kadel, R. W.
Krenz, W.
Li, J.
Li, Q. Z.
Lu, M.
Bohm, A.
Luckey, David
Ma, C. M.
Ma, D. A.
Massaro, G. G. G.
Matsuda, T.
Newman, H.
Pohl, M.
Poschmann, F. P.
Revol, J. P.
Rohde, M.
Branson, J. G.
Rykaczewski, H.
Sinram, K.
Tang, H. W.
Tang, L. G.
Ting, Samuel C. C.
Tung, K. L.
Vannucci, F.
Wang, X. R.
Wei, P. S.
White, M.
Bron, J.
Wu, G. H.
Wu, T. W.
Xi, J. P.
Yang, P. C.
Yu, C. C.
Yu, X. H.
Zhang, N. L.
Zhu, R. Y.
Mark-J Collaboration
Buikman, D.
Burger, J. D.
Chang, C. C.
Chen, H. S.
Source :: Physical review letters 44(26), 1722-1725 (1980). doi:10.1103/PhysRevLett.44.1722
Publication Year :: 1980
Publisher :: American Physical Society (APS), 1980.
Abstract: This paper reports the results of a study of hadron production in e/sup +/e/sup -/ collisions at c.m. energies of 33, 35, and 35.8 GeV. Production of a new quark flavor has been sought. The measured values of the total cross section, the thrust distributions, and the study of inclusive muon production show no evidence for the production of a new charge-2/3e quark near threshold. In addition, during an energy scan in the region 29.9< or =..sqrt..s< or =31.6 GeV, no hadron resonance indicating the existence of a bound state composed of charge-2/3e quarks has been found.

Subjects :: Quark
Particle physics
MUON [ELECTROPRODUCTION]
High Energy Physics::Lattice
Electron–positron annihilation
Hadron
General Physics and Astronomy
DESY PETRA STOR
Elementary particle
TOTAL CROSS SECTION [RATIO]
SPECTRUM [THRUST]
Nuclear physics
ELECTROPRODUCTION [HADRON]
TOTAL CROSS SECTION [ENERGY DEPENDENCE]
ddc:550
TOP [SEARCH FOR]
ELECTROPRODUCTION [MUON]
THRUST [SPECTRUM]
Nuclear Experiment
EXPERIMENTAL RESULTS
ENERGY DEPENDENCE [TOTAL CROSS SECTION]
Quantum chromodynamics
Physics
HADRON [ELECTROPRODUCTION]
Annihilation
Muon
JET [ELECTROPRODUCTION]
High Energy Physics::Phenomenology
Quark model
COLLIDING BEAMS [ELECTRON POSITRON]
ELECTRON POSITRON [COLLIDING BEAMS]
INCLUSIVE REACTION [ELECTRON POSITRON]
RATIO [TOTAL CROSS SECTION]
ELECTRON POSITRON [ANNIHILATION]
ANNIHILATION [ELECTRON POSITRON]
ELECTROPRODUCTION [JET]
MARK J
High Energy Physics::Experiment
35.0: 35.8 GEV-CM [33.0]

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