نتایج جستجو برای: large cross section
تعداد نتایج: 1581422 فیلتر نتایج به سال:
Search for resonant diboson production in the q ¯ q final state in pp collisions at √ s = 8 TeV with the ATLAS detector Abstract This paper reports on a search for narrow resonances in diboson production in the q ¯ q final state using pp collision data corresponding to an integrated luminosity of 20 fb −1 collected at √ s = 8 TeV with the ATLAS detector at the Large Hadron Collider. No signific...
We study the production of W bosons at large transverse momentum in pp collisions at the Large Hadron Collider (LHC). We calculate the complete next-to-leading order (NLO) corrections to the differential cross section. We find that the NLO corrections provide a large increase to the cross section but, surprisingly, do not reduce the scale dependence relative to leading order (LO). We also calcu...
The status of top quark searches will be briefly reviewed. Theoretical predictions for the top quark decay rate are presented including QCD and electroweak radiative corrections. The possibilities for quarkonium searches at an hadron collider will be discussed. The perspectives for top production at an electron positron collider will be described in detail with emphasis on the behavior of the c...
We discuss the most recent calculations of the top quark total cross section and transverse momentum distributions at the Tevatron and the LHC. These calculations include the soft-gluon corrections at next-to-next-to-leading order (NNLO). The soft NNLO corrections stabilize the scale dependence of the cross section. Presented at DPF 2004, Riverside, California, August 26-31, 2004.
We derive the high energy asymptotic of oneand two-loop corrections in the nextto-next-to-leading logarithmic approximation to the differential cross section of W -pair production at the LHC. For large invariant mass of the W-pair the (negative) one-loop terms can reach more than 40%, which are partially compensated by the (positive) two-loop terms of up to 10%.
An effective mass scale M eff susy for supersymmetric particles is defined and techniques for its measurement at the LHC discussed. Monte Carlo results show that, for jets + E miss T events, a variable constructed from the scalar sum of the transverse momenta of all reconstructed jets together with E miss T provides in most cases the most accurate model independent measurement of M eff susy (in...
LHCb is a second generation b-physics experiment, devoted to studies of new phenomena in CP violation and in rare decays. Previous experiments have provided extensive studies on b → d transitions [1], but a limited knowledge on b → s transitions is available up to now and in this sector large space is still available for New Physics (NP) effects, beyond Standard Model (SM). Precision measuremen...
We study the possibility of observing an ‘invisible’ Higgs boson in central exclusive diffractive production at the LHC. We evaluate the cross section using, as a simple example, the Standard Model with a heavy fourth generation, where the invisible decay mode H → ν4ν̄4 dominates, with the heavy neutrino mass M(ν4) ≃ 50 GeV. We discuss the possible requirements on trigger conditions and the back...
This report is a summary of the evidence for top quark production in pp collisions at a center of mass energy of 1.8 TeV which was obtained by the CDF Collaboration earlier this year. The data analyzed corresponds to an integrated luminosity of 19.3 pb ?1 , recorded with the CDF Detector at the Fermilab Tevatron Collider during 1992-1993. Three diierent search channels for t t production are us...
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