A PRECISE MEASUREMENT OF THE CROSS-SECTION OF THE INVERSE MUON DECAY NU(MU)-)-]MU(-)+NU(E)(E()

Authors
VILAIN P WILQUET G BEYER R FLEGEL W GROTE H MOUTHUY T OVERAS H PANMAN J ROZANOV A WINTER K ZACEK G ZACEK V BUSSER FW FOOS C GERLAND L LAYDA T NIEBERGALL F RADEL G STAHELIN P VOSS T FAVART D GREGOIRE G KNOOPS E LEMAITRE V GORBUNOV P GRIGORIEV E KHOVANSKY V MASLENNIKOV A LIPPICH W NATHANIEL A STAUDE A VOGT J COCCO AG EREDITATO A FIORILLO G MARCHETTISTASI F PALLADINO V STROLIN P CAPONE A DEPEDIS D DORE U FRENKELRAMBALDI A LOVERRE PF MACINA D PIREDDA G SANTACESARIA R DICAPUA E RICCIARDI S SAITTA B AKKUS B ARIK E SERINZEYREK M SEVER R TOLUN P HILLER K NAHNHAUER R ROLOFF HE
Citation
P. Vilain et al., A PRECISE MEASUREMENT OF THE CROSS-SECTION OF THE INVERSE MUON DECAY NU(MU)-)-]MU(-)+NU(E)(E(), Physics letters. Section B, 364(2), 1995, pp. 121-126
Citations number
15
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
364
Issue
2
Year of publication
1995
Pages
121 - 126
Database
ISI
SICI code
0370-2693(1995)364:2<121:APMOTC>2.0.ZU;2-F
Abstract
We report our final results from the analysis of the full high statist ics sample of events of the reaction nu(mu) + e(-) --> mu(-) + nu(e) c ollected with the CHARM II detector in the CERN wide-band neutrino bea m during the years 1988 to 1991. From a signal of 15 758 +/- 324 inver se muon decay events we derived, in the Born approximation, a value of (16.51 +/- 0.93) x 10(-42) cm(2) GeV-1 for the asymptotic cross secti on slope sigma/E(n)u, in good agreement with the Standard Model predic tion of 17.23 x 10(-42) cm(2) GeV-1. The result constrains the scalar coupling of the electron and the muon to \g(LL)(S)\(2) < 0.475 at 90% CL.