نتایج جستجو برای: large cross section
تعداد نتایج: 1581422 فیلتر نتایج به سال:
In this paper we use the conformal anomaly in QCD to derive the coupling of light radion to gluons in the Randall-Sundrum model and use it to compute the radion production cross section at hadron colliders by gluon fusion. We find that the radion production cross section by gluon fusion at LHC would exceed that of the higgs boson by a factor that lies between 7 and 8 over most of the range. The...
Two mechanisms are examined for hard double pomeron exchange dijet production, the factorized model of Ingelman-Schlein and the nonfactorized model of lossless jet production which exhibits the Collins-Frankfurt-Strikman mechanism. Comparison between these two mechanisms are made of the total cross section, ET -spectra, and mean rapidity spectra. For both mechanisms, several specific models are...
We investigate a model of SU (2) ⊗ U (1) singlet scalars coupled to Standard Model. We point out that for the case of the maximal mixing between singlet scalars and standard Higgs boson the Higgs boson production cross section is smaller than the standard Higgs boson production by factor 1 N +1 , where N is the number of singlet scalars. For the case of big mixing Higgs boson could be nonobserv...
The leading-order process for the production of a Z boson and a heavy-quark jet at hadron colliders is gQ → ZQ (Q = c, b). We calculate this cross section at next-toleading order at the Tevatron and the LHC, and compare it with other sources of ZQ events. This process is a background to new physics, and can be used to measure the heavy-quark distribution function. Mail address: Dipartimento di ...
Results are presented from a search for particle dark matter (DM), extra dimensions, and unparticles using events containing a jet and an imbalance in transverse momentum. The data were collected by the CMS detector in proton–proton collisions at the LHC and correspond to an integrated luminosity of 19.7 fb −1 at a centre-of-mass energy of 8 TeV. The number of observed events is found to be con...
Hadron production measurements for neutrino experiments is a well established field at CERN since the '70s. Precise prediction of atmospheric neutrino fluxes, characterization of accelerator neutrino beams, quantification of pion production and capture for neutrino factory designs, all of these would profit from hadron production measurements. In recent years, interest in such studies was reviv...
The pomeron flux renormalization hypothesis is reviewed and presented as a scaling law in diffraction. Predictions for soft and hard diffraction based on pomeron flux scaling are compared with experimental results. STANDARD POMERON FLUX The cross section for hadron dissociation on protons, hp → Xp, at large xF ≡ p‖/2 √ s, where p‖ is the z(beam)-component of the (leading) proton in the final st...
Article history: Received 15 January 2013 Received in revised form 8 April 2013 Accepted 8 April 2013 Available online 15 April 2013 Editor: D.F. Geesaman The ALICE Collaboration at the CERN Large Hadron Collider reports the first measurement of the inclusive differential jet cross section at mid-rapidity in pp collisions at √ s= 2.76 TeV, with integrated luminosity of 13.6 nb−1. Jets are measu...
The hierarchy problem can be addressed by extending the four-dimensional space-time to include an extra compact spatial dimension with non-trivial “warped” metric, as first suggested by Randall and Sundrum. If the Randall-Sundrum framework is realized in string theory, the effective value of the string scale in the vicinity of the infrared boundary should be in the TeV domain. The most attracti...
These proceedings report on a search for the Standard Model Higgs boson in the diphoton decay channel in proton-proton collisions at center-of-mass energies of √ s = 7TeV and √ s = 8TeV using integrated luminosities of 4.8fb−1 and 5.9fb−1, respectively, recorded with the ATLAS detector at the Large Hadron Collider. The search is performed for Higgs boson masses between 110 and 150GeV. The expec...
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