Experimental results from CMS
نویسندگان
چکیده
منابع مشابه
Top results from CMS
The top quark has a special place in the Standard Model (SM). It is the heaviest elementary particle known to date, its mass [1] being very close to the scale of electroweak symmetry breaking. As such it plays a special role in many models of new physics beyond the SM. In the SM, the top quark decays almost exclusively to a W b pair. At the LHC [2], the top quark is predominantly produced in pa...
متن کاملSoft QCD Results from CMS
Studies of hadron production in proton-proton collisions, including charged particle transverse momentum, pseudo-rapidity and event-by-event multiplicity distributions at √ s = 0.9, 2.36 and 7 TeV are shown. Measured spectra of identified strange hadrons, reconstructed based on their decay topology, are also presented. Comparisons to several QCD Monte Carlo models and tunes are discussed. Resul...
متن کاملCMS Results on Hard Diffraction
Diffractive processes contribute a significant fraction to the total inelastic proton-proton cross sections at high energies. These reactions can be described in terms of the exchange of a pomeron, a hypothetical object with the quantum numbers of the vacuum. The experimental signatures of diffractive events are the presence of non-exponentially suppressed large rapidity gaps and/or presence of...
متن کاملCMS results on soft diffraction
Diffractive interactions are characterized by the presence of at least one non-exponentially suppressed large rapidity gap (lrg) in the final state, defined as a region in pseudorapidity devoid of particles. The origin of lrgs is attributed to a color-singlet exchange with vacuum quantum numbers, referred to as Pomeron (IP ) exchange. Soft diffractive interactions (with no hard scale) cannot be...
متن کاملCMS tracking performance results from early LHC operation
The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36 TeV were recorded by the CMS detector in December 2009. The trajectories of charged particles produced in the collisions were reconstructed using the all-silicon Tracker and their momenta were measured in the 3.8 T axial magnetic field. Results from the Tracker commissioning are presented including studies of timing, efficie...
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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2018
ISSN: 2100-014X
DOI: 10.1051/epjconf/201819200005