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Search for single b*-quark production with the ATLAS detector at root s=7 TeV
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2905
2013 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 721, no 4-5, 171-189 p.Article in journal (Refereed) Published
Abstract [en]

The results of a search for an excited bottom-quark b* in pp collisions at root s = 7 TeV, using 4.7 fb(-1) of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b*-quark is produced through a chromomagnetic interaction and subsequently decays to a W boson and a top quark. The search is performed in the dilepton and lepton + jets final states, which are combined to set limits on b*-quark couplings for a range of b*-quark masses. For a benchmark with unit size chromomagnetic and Standard Model-like electroweak b* couplings, b* quarks with masses less than 870 GeV are excluded at the 95% credibility level.

Place, publisher, year, edition, pages
2013. Vol. 721, no 4-5, 171-189 p.
Keyword [en]
ATLAS, b*, Single top-quark, Excited quark
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-123225DOI: 10.1016/j.physletb.2013.03.016ISI: 000318055900001OAI: oai:DiVA.org:kth-123225DiVA: diva2:625526
Funder
Swedish Research Council
Note

QC 20130605. Author count: 2905

Available from: 2013-06-05 Created: 2013-06-05 Last updated: 2017-12-06Bibliographically approved

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Strandberg, Jonas

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