نتایج جستجو برای: large cross section
تعداد نتایج: 1581422 فیلتر نتایج به سال:
At hadron colliders, the search for R-parity violating supersymmetry can probe scalar masses beyond what is covered by pair production processes. We evaluate the next-toleading order SUSY-QCD corrections to the associated stop or sbottom production with a lepton through R-parity violating interactions. We show that higher order corrections render the theoretical predictions more stable with res...
I present approximate next-to-next-to-leading-order (aNNLO) transverse-momentum (pT ) distributions in single-top production processes. The aNNLO results are derived from next-to-next-to-leading-logarithm (NNLL) resummation of soft-gluon corrections in the differential cross section. Single-top as well as single-antitop pT distributions are shown in t-channel, s-channel, and tW production for L...
When the LHC starts its operation, CMS will have a unique opportunity to study quarkonium production in pp collisions and later in PbPb collisions. Here we report on the methods and plans for measuring the differential pT J/ψ→ μ μ production cross section, using data to be collected in the first LHC run by the CMS detector. Furthermore we discuss the performance of the CMS detector for quarkoni...
We have calculated the mass distribution (dσ/dMX ) as observed by UA8 Collaboration in the inclusive reaction pp̄ → pXp̄ at √s = 630GeV , using the Interacting Gluon Model (IGM) with Double Pomeron Exchange (DPE) included. The only new parameter is the IP -IP cross section, which we can extract from fitting experimental data. We compare our results with the values obtained in the UA8 study. Assum...
A measurement of the cross section for the production of top quark–antiquark pairs (tt) in association with a vector boson V (W or Z) in proton-proton collisions at √ s = 8 TeV is presented. The results are based on a dataset corresponding to an integrated luminosity of 19.5 fb −1 recorded with the CMS detector at the LHC. The measurement is performed in three leptonic (e and µ) channels: a sam...
We evaluate the invariant cross section for production of dileptons in forward rapidities at RHIC and LHC, using the Color Glass Condensate formalism and present results for the nuclear modification factor Rd(p)A as a function of dilepton invariant mass for the most central deuteron (proton)-nucleus collisions.
We present a concise review of the plans of the ATLAS and CMS Collaborations to search for new physics using dijet events. The inclusive cross section as a function of jet pT , the dijet mass distribution and the dijet ratio’s CMS techniques are presented together with their potential of discovery with a focus on the integrated luminosities of 10, 100 and 1000 pb. Analogously, the inclusive jet...
The differential cross section and charge asymmetry for inclusive pp → W ± + X → μ ± ν + X production at √ s = 8 TeV are measured as a function of muon pseudo-rapidity. The data sample corresponds to an integrated lumi-nosity of 18.8 fb −1 recorded with the CMS detector at the LHC. These results provide important constraints on the par-ton distribution functions of the proton in the range of th...
The Standard Model predicts the value of the Higgs self-coupling but it cannot be measured at LHC. This measurement requires a machine such as the proposed International Linear Collider. Here, the sensitivity to the Higgs self-coupling is evaluated using the ZHH to six jets channel for a Higgs mass of 120GeV/c. Full simulation has been carried out for an integrated luminosity of 500 fb. Several...
The T-odd leptons predicted by the littlest Higgs model with T-parity can be pair produced via the subprocesses gg → l+Hl − H , qq → l + Hl − H , γγ → l + Hl − H and V V → l+Hl−H (V=W or Z) at the CERN Large Hadron Collider (LHC). We estimate the hadronic production cross sections for all of these processes and give a simply phenomenology analysis. We find that the cross sections for most of th...
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