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Seminer Oturumu: "Search for Dijet Resonances in the Dijet Mass Distribution in pp Collisions at s = sqrt(7) TeV" -- Bora Isildak (Bogazici Universitesi)
Description
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We present a measurement of the dijet invariant mass spectrum and search for new
particles decaying to dijets at CMS in pp collisions at s = sqrt(7) TeV with 120 ± 13 nb−1
of data. The dijet mass distribution of the two leading jets in the pseudorapidity
region | η |< 1.3 is measured and compared to QCD predictions from PYTHIA propagated
through the CMS detector simulation. The highest observed dijet mass is 2.13
TeV. We fit the observed dijet mass spectrum with a parameterization, search for dijet
resonances, and set upper limits at 95% Confidence Level (C.L.) on the resonance
cross section. These generic cross section limits are compared with theoretical predictions
for the cross section for several models of new particles: string resonances,
axigluons, colorons, excited quarks, E6 diquarks, Randall-Sundrum Gravitons, W’ and
Z’. We exclude at 95% C.L. string resonances with mass less than 1.67 TeV, excited
quarks with mass less than 0.59 TeV and axigluons and colorons with mass less than
0.52 TeV. Our limit on string resonances is more stringent than previously published
limits.
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TOPLANTIYA AIT DOKUMANLAR SEMINERDEN SONRA BU SAYFADAN ELDE EDILEBILIR.
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