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Search for excited quarks in ep collisions at HERA


Aaron, F D; Alexa, C; Aliumjiang, K; Andreev, V; Müller, K; Nowak, K; Robmann, P; Schmitz, C; Straumann, U; Truöl, P; H1 Collaboration (2009). Search for excited quarks in ep collisions at HERA. Physics Letters B, 678(4):335-343.

Abstract

A search for excited quarks is performed using the full e±p data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb−1. The electroweak decays of excited quarks q*→qγ, q*→qZ and q*→qW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependent exclusion limits on q* production cross sections and on the ratio f/Λ of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited quark searches.

A search for excited quarks is performed using the full e±p data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb−1. The electroweak decays of excited quarks q*→qγ, q*→qZ and q*→qW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependent exclusion limits on q* production cross sections and on the ratio f/Λ of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited quark searches.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2009
Deposited On:25 Nov 2009 14:03
Last Modified:05 Apr 2016 13:33
Publisher:Elsevier
ISSN:0370-2693
Publisher DOI:10.1016/j.physletb.2009.06.044
Related URLs:http://arxiv.org/abs/0904.3392v2
Permanent URL: http://doi.org/10.5167/uzh-23959

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