Review of CMS and TOTEM Results on Multi-parton Interactions, Soft QCD and Diffraction
نویسندگان
چکیده
منابع مشابه
LHCb Results on Multi-parton Interactions, Soft QCD and Diffraction
Due to its unique pseudorapidity coverage (2 < η < 5) and excellent performance, the LHCb detector allows for studying soft QCD processes at large rapidities and low transverse momenta. Selected results, such as charged particle multiplicities and densities, forward energy flow and prompt charm production are briefly summarized in these proceedings. The measurements are performed using large sa...
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 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...
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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 کاملHard Diffraction from Parton Rescattering in QCD
We analyze the QCD dynamics of diffractive deep inelastic scattering. The presence of a rapidity gap between the target and diffractive system requires that the target remnant emerges in a color singlet state, which we show is made possible by the soft rescattering of the struck quark. This rescattering is described by the path-ordered exponential (Wilson line) in the expression for the parton ...
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ژورنال
عنوان ژورنال: Acta Physica Polonica B Proceedings Supplement
سال: 2015
ISSN: 1899-2358,2082-7865
DOI: 10.5506/aphyspolbsupp.8.763