56370188
Summary of the CMS potential for the Higgs boson discovery
This work summarizes the studies for the Higgs boson searches in CMS at the LHC collider. The main discovery channels are presented and the potential is given for the discovery of the SM Higgs boson and the Higgs bosons of the MSSM. The phenomenology, detector, trigger and reconstruction issues are briefly discussed.
119199946
Same sign WW scattering process as a probe of Higgs boson in pp collision at $\sqrt{s}=10$ TeV
WW scattering is an important process to study electroweak symmetry breaking in the Standard Model at the LHC, in which the Higgs mechanism or other new physics processes must intervene to preserve the unitarity of the process below 1 TeV. This channel is expected to be one of the most sensitive to determine whether the Higgs boson exists. In this paper, the final state with two same sign Ws is studied, with a simulated sample corresponding to the integrated luminosity of 60 fb−1 in pp collision at $\sqrt{s}=10$ TeV. Two observables, the invariant mass of μμ from W decays and the azimuthal angle difference between the two μs, are utilized to distinguish the Higgs boson existence scenario from the Higgs boson absence scenario. A good signal significance for the two cases can be achieved. If we define the separation power of the analysis as the distance, in the log-likelihood plane, of pseudo-experiments outcomes in the two cases, with the total statistics expected from the ATLAS and CMS experiments at the nominal center-of-mass energy of 14 TeV, the separation power will be at the level of 4 σ.
18295974
Dynamic Range of the CMS HB & HE Electronics
This note describes a study of the maximum tower energies expected in the CMS HB & HE detectors from the QCD production of 2 jets at the LHC. This study shows that the maximum tower for the expected lifetime of CMS at the LHC should never exceed 3.5 TeV in any compartment of the barrel or endcap hadron calorimeter. ) email address rvidal@fnal.gov
62209352
Volunteer Clouds and Citizen Cyberscience for LHC Physics
Computing for the LHC, and for HEP more generally, is traditionally viewed as requiring specialized infrastructure and software environments, and therefore not compatible with the recent trend in volunteer computing, where volunteers supply free processing time on ordinary PCs and laptops via standard Internet connections. In this paper, we demonstrate that with the use of virtual machine technology, at least some standard LHC computing tasks can be tackled with volunteer computing resources. Specifically, by presenting volunteer computing resources to HEP scientists as a volunteer cloud, essentially identical to a Grid or dedicated cluster from a job submission perspective, LHC simulations can be processed effectively. This article outlines both the technical steps required for such a solution and the implications for LHC computing as well as for LHC public outreach and for participation by scientists from developing regions in LHC research.