Phenomenology of single and double diffraction dissociation

نویسنده

  • Konstantin Goulianos
چکیده

Measurements at the lhc have shown that there are sizable disagreements among Monte Carlo (mc) implementations of “soft” processes based on cross sections proposed by various physics models, and that it is not possible to reliably predict all such processes, or even all aspects of a given process, using a single model [1, 2, 3]. In the cdf studies of diffraction at the Tevatron, all processes are well modeled by the mbr (Minimum Bias Rockefeller) mc simulation, which is a stand-alone simulation based on a unitarized Regge-theory model, renorm [4], employing inclusive nucleon parton distribution functions (pdf’s) and qcd color factors. The renorm model was updated in a presentation at eds-2009 [5] to include a unique unitarization prescription for predicting the total pp cross section at high energies, and that update has been included as an mbr option for simulating diffractive processes in pythia8 since version pythia8.165 [6], to be referred here-forth as pythia8-mbr. In this paper, we briefly review the cross sections [7] implemented in this option of pythia8 and compare the sd and dd predictions with lhc measurements.

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تاریخ انتشار 2013