Search for a heavy particle decaying to a top quark and a light quark in pp? collisions at is=1.96 TeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00389139" target="_blank" >RIV/68378271:_____/12:00389139 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.108.211805" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.108.211805</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.108.211805" target="_blank" >10.1103/PhysRevLett.108.211805</a>

Result language
angličtina
Original language name
Search for a heavy particle decaying to a top quark and a light quark in pp? collisions at is=1.96 TeV
Original language description
We present a search for a new heavy particle $M$ produced in association with a top quark, $p/bar{p}/rightarrow t(M /rightarrow /bar{t}q)$ or $p/bar{p}/rightarrow /bar{t}(/bar{M}/rightarrow t/bar{q})$, where $q$ stands for up and down quarks. Such a particle may explain the recent anomalous measurements of top-quark forward-backward asymmetry. If the light-flavor quark ($q$) is reconstructed as a jet ($j$), this gives a $/bar{t}+j$ or $t+j$ resonance in $t/bar{t}$+jet events, a previously unexplored experimental signature. In a sample of events with exactly one lepton, missing transverse momentum and at least five jets, corresponding to an integrated luminosity of 8.7 fb$^{-1}$ collected by the CDF II detector, we find the data to be consistent with the standard model. We set cross-section upper limits on the production ($p/bar{p}/rightarrow Mt$ or $/bar{M}/bar{t}$) at 95% confidence level from 0.61 pb to 0.02 pb for $M$ masses ranging from 200 GeV$/c^2$ to 800 GeV$/c^2$, respectively.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
<a href="/en/project/LC527" target="_blank" >LC527: Center for Particle Physics</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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