Anomalous production of high-energy muons in e$sup +$$e$$sup -$ collisions at 4.8 GeV

Journal Article · Mon Mar 15 04:00:00 EST 1976 · Phys. Rev. Lett., v. 36, no. 11, pp. 558-561

OSTI ID:4019229

Cavalli-Sforza, M; Goggi, G; Mantovani, G C; Piazzoli, A; Rossini, B; Scannicchio, D; Coyne, D G; O'Neill, G K; Sadrozinski, H F.W.; Shinsky, K A; Atwood, T L; Badtke, D H; Barnett, B A; Trasatti, L V

In view of the possible production of heavy leptons or charmed states in e$sup +$$e$$sup -$ collisions, we searched for anomalous muons with momenta p/sub $mu$/ > approx. 1 GeV/c. The inclusive cross section for n/sub ch/ > or = 3 has an upper limit of 96 pb (assuming isotropy). For n/sub ch/ = 2 and noncoplanarity > 20$sup 0$, an excess of muonic events is observed, corresponding to (dsigma/d$Omega$) = 23$sup +12$$sub 9$ pb/sr at 90$sup 0$; the probability that known processes produce the observed events is 2 x 10$sup -4$. (AIP)

• Research Organization: Istituto di Fisica Nucleare, Universita di Pavia
• NSA Number: NSA-33-031254
• OSTI ID: 4019229
• Journal Information: Phys. Rev. Lett., v. 36, no. 11, pp. 558-561, Journal Name: Phys. Rev. Lett., v. 36, no. 11, pp. 558-561; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

*ELECTRON-POSITRON INTERACTIONS-- INCLUSIVE INTERACTIONS
*MUONS-- MULTIPLE PRODUCTION
641001*
ANGULAR DISTRIBUTION
CROSS SECTIONS
GEV RANGE 01-10
LIMITING VALUES
LINEAR MOMENTUM
N64110* --Physics (High Energy)--Particle Interactions & Properties (Experimental)--Electromagnetic
QUANTUM ELECTRODYNAMICS