A search for excited neutrinos in e- p collisions at HERA

被引：15

作者：

Aaron, F. D.

Alexa, C.

Andreev, V.

Antunovic, B.

Aplin, S.

Asmone, A.

Astvatsatourov, A.

Backovic, S.

Baghdasaryan, A.

Baranov, P.

Barrelet, E.

Bartel, W.

Baudrand, S.

Beckingham, M.

Begzsuren, K.

Behnke, O.

Belousov, A.

Berger, N.

Bizot, J. C.

Boenig, M. -O.

Boudry, V.

Bozovic-Jelisavcic, I.

Bracinik, J.

Brandt, G.

Brinkmann, M.

Brisson, V.

Bruncko, D.

Bunyatyan, A.

Buschhorn, G.

Bystritskaya, L.

Campbell, A. J.

Avila, K. B. Cantun

Cassol-Brunner, F.

Cerny, K.

Cerny, V.

Chekelian, V.

Cholewa, A.

Contreras, J. G.

Coughlan, J. A.

Cozzika, G.

Cvach, J.

Dainton, J. B.

Daum, K.

Deak, M.

de Boer, Y.

Delcourt, B.

Del Degan, M.

Delvax, J.

De Roeck, A.

De Wolf, E. A.

机构：

[1] Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France

来源：

PHYSICS LETTERS B | 2008年 / 663卷 / 05期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1016/j.physletb.2008.04.020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for first generation excited neutrinos is performed using the full e(-) p data sample collected by the HI experiment at HERA at a centre-of-mass energy of 319 GeV, corresponding to a total luminosity of 184 pb(-1). The electroweak decays of excited neutrinos nu* -> nu gamma, v* -> nu Z and nu* -> eW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for excited neutrino production is found. Mass dependent exclusion limits on nu* production cross sections and on the ratio of the coupling to the compositeness scale f/boolean AND are derived within gauge mediated models. A limit on f/boolean AND A, independent of the relative couplings to the SU(2) and U(1) gauge bosons, is also determined. These limits extend the excluded region to higher masses than has been possible in previous excited neutrino searches. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：382 / 389

页数：8

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