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Disentangling the soft and hard components of the pp collisions using the sphero(i)city approach

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arxiv 1404.2372 v1 pith:PM7BSKKJ submitted 2014-04-09 hep-ph

Disentangling the soft and hard components of the pp collisions using the sphero(i)city approach

Eleazar Cuautle , Raul Jimenez , Ivonne Maldonado , Antonio Ortiz , Guy Paic , Edgar Perez This is my paper
classification hep-ph
keywords softeventshardapproachcollisionscolordataflow-like
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A new method to extract information from the pp data is proposed. The approach is based on the use of the event structure variables: sphericity and spherocity, to split the data into enhanced soft and hard processes samples corresponding to events with large and low numbers of multi-parton interactions, respectively. The present study was developed in the framework of Pythia 8.180 for inelastic pp collisions at sqrt(s) =7 TeV. As an application of the method, a study of the identified particle transverse momentum spectra and their ratios; is presented for soft (isotropic) and hard (jetty-like) events. The flow-like effect on these observables due to multi-parton interactions and color reconnection is relevant for soft events suggesting that partons inside the jet do not feel color reconnection and its flow-like consequences.

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