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Search for the lepton family number violating process nu(mu)e(-) --> mu(-)nu(e) |
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| Authors: | Formaggio J A Yu J Adams T Alton A Avvakumov S de Barbaro L de Barbaro P Bernstein R H Bodek A Bolton T Brau J Buchholz D Budd H Bugel L Conrad J M Drucker R B Fleming B T Foster J Frey R Goldman J Goncharov M Harris D A Johnson R A Kim J H Koutsoliotas S Lamm M J Marsh W Mason D McDonald J McFarland K S McNulty C Naples D Nienaber P Romosan A Sakumoto W K Schellman H M Shaevitz M H Spentzouris P Stern E G Suwonjandee N Vakili M Vaitaitis A Yang U K Zeller G P Zimmerman E D |
| Affiliation: | Columbia University, New York, New York 10027, USA. |
| Abstract: | The NuTeV experiment at Fermilab has used a sign-selected neutrino beam to perform a search for the lepton number violating process nu(mu)e(-)-->mu(-)nu(e), and to measure the cross section of the standard model inverse muon decay process nu(mu)e(-)-->mu(-)nu(e). NuTeV measures the inverse muon decay asymptotic cross-section slope sigma/E to be (13.8 +/- 1.2 +/- 1.4) x 10(-42) cm(2)/GeV. The experiment also observes no evidence for lepton number violation and places one of the most restrictive limits on the cross-section ratio sigma(nu(mu)e(-)-->mu(-)nu(e))/sigma(nu(mu)e(-)-->mu(-)nu(e)) < or = 1.7% at 90% C.L. for V-A couplings and < or = 0.6% for scalar couplings. |
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