Journal ArticleDOI
Observation of a narrow resonance at 9.46 GeV in electron - positron annihilations
C. W. Darden,H. Hasemann,A. Krolzig,W. Schmidt-Parzefall,H. Schröder,H.D. Schulz,F. Selonke,E. Steinmann,R. Wurth,Werner Hofmann,D. Wegener,H. Albrecht,K. R. Schubert,P. Böckmann,Leif J. Jönsson +14 more
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In this article, the DASP detector at the DORIS storage ring was used to observe a narrow resonance in the reaction e+e− → hadrons using the DAN detector.About:
This article is published in Physics Letters B.The article was published on 1978-05-22. It has received 115 citations till now. The article focuses on the topics: Resonance (particle physics) & Positron.read more
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Short-distance analysis for heavy-quark systems: (I). Diagrammatics☆
TL;DR: In this paper, the authors investigated the sense in which the coupling of soft external probes to heavy quark-antiquark bound states may be considered a short-distance process, and applied an observation of Applequist, Dine and Muzinich to justify performing operator product expansions on gluon insertions in the heavy-quark state; this allows them to summarize the couplings of this state to external probes as the matrix elements of a series in local operators.
Journal ArticleDOI
Short-distance analysis for heavy-quark systems: (II). Applications
Gyan Bhanot,Michael E. Peskin +1 more
TL;DR: In this article, the authors apply the methodology of the operator product expansion to a number of processes involving the coupling of heavy quark-anti-quark mesons to light hadrons.
Journal ArticleDOI
Limits on the number of flavours in grand unified theories from higher-order corrections to fermion masses
TL;DR: In this article, the complete two-loop corrections to the matrix elements of the fermion mass operator in general gauge theory were calculated and applied to the SU(5) grand unified model, where higher-order corrections tend to increase the quark masses relative to the results of the lowest-order calculation.
Journal ArticleDOI
e+e- physics at petra—the first five years
TL;DR: The PETRA (Positron-Electron T andem Ring Accelerator) is located at DESY in Hamburg, Germany, and is the highest energy electron-positron storage ring in the world as discussed by the authors.
Journal ArticleDOI
Top quark physics in hadron collisions
TL;DR: The top quark is the largest elementary particle observed to date and its large mass makes it an ideal laboratory to test predictions of perturbation theory concerning heavy quark production at hadron colliders as discussed by the authors.
References
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Observation of a Dimuon Resonance at 9.5 GeV in 400-GeV Proton-Nucleus Collisions
S. W. Herb,D. C. Hom,Leon M. Lederman,J. C. Sens,H. D. Snyder,J. K. Yoh,J. A. Appel,B. C. Brown,C. N. Brown,W. R. Innes,K. Ueno,T. Yamanouchi,A. S. Ito,H. Jöstlein,D. M. Kaplan,R. D. Kephart +15 more
TL;DR: Dimuon production in 400-GeV proton-nucleus collisions was studied in this paper, where a strong enhancement was observed at 9.5 GeV mass in a sample of 9000 dimuon events with a mass
Journal ArticleDOI
The phenomenology of the next left-handed quarks
TL;DR: In this paper, the authors discuss the properties of new states made of t (charge = 2 3 ) or b ( charge = − 1 3 ) quarks in a model with just left-handed currents.
Journal ArticleDOI
Heavy Quarks in e+e− Annihilation*
Estia Eichten,K. Gottfried +1 more
TL;DR: In this paper, the most important features of the spectrum of a quark with respect to the mass of the quark were discussed. But the most relevant features of this spectrum were not discussed.
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INITIAL-STATE RADIATIVE AND RESOLUTION CORRECTIONS AND RESONANCE PARAMETERS IN e+e- ANNIHILATION
John David Jackson,D.L. Scharre +1 more
TL;DR: In this article, the effects in e+e− annihilation of soft photon emission by the electrons and a finite energy spread on the shapes of resonant cross sections and determination of resonance parameters are treated in a simple coherent manner.
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