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Endpoint behavior of high-energy scattering cross sections

In high-energy processes near the endpoint, there emerge new contributions associated with spectator interactions. Away from the endpoint region, these new contributions are suppressed compared to the leading contribution, but the leading contribution becomes suppressed as we approach the endpoint a...

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Detalles Bibliográficos
Autores principales: Chay, Junegone, Kim, Chul
Lenguaje:eng
Publicado: 2010
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.82.094021
http://cds.cern.ch/record/1281117
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author Chay, Junegone
Kim, Chul
author_facet Chay, Junegone
Kim, Chul
author_sort Chay, Junegone
collection CERN
description In high-energy processes near the endpoint, there emerge new contributions associated with spectator interactions. Away from the endpoint region, these new contributions are suppressed compared to the leading contribution, but the leading contribution becomes suppressed as we approach the endpoint and the new contributions become comparable. We present how the new contributions scale as we reach the endpoint and show that they are comparable to the suppressed leading contributions in deep-inelastic scattering by employing a power counting analysis. The hadronic tensor in deep-inelastic scattering is shown to factorize including the spectator interactions, and it can be expressed in terms of the lightcone distribution amplitudes of initial hadrons. We also consider the contribution of the spectator contributions in Drell-Yan processes. Here the spectator interactions are suppressed compared to double parton annihilation according to the power counting.
id cern-1281117
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
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spelling cern-12811172019-09-30T06:29:59Zdoi:10.1103/PhysRevD.82.094021http://cds.cern.ch/record/1281117engChay, JunegoneKim, ChulEndpoint behavior of high-energy scattering cross sectionsParticle Physics - PhenomenologyIn high-energy processes near the endpoint, there emerge new contributions associated with spectator interactions. Away from the endpoint region, these new contributions are suppressed compared to the leading contribution, but the leading contribution becomes suppressed as we approach the endpoint and the new contributions become comparable. We present how the new contributions scale as we reach the endpoint and show that they are comparable to the suppressed leading contributions in deep-inelastic scattering by employing a power counting analysis. The hadronic tensor in deep-inelastic scattering is shown to factorize including the spectator interactions, and it can be expressed in terms of the lightcone distribution amplitudes of initial hadrons. We also consider the contribution of the spectator contributions in Drell-Yan processes. Here the spectator interactions are suppressed compared to double parton annihilation according to the power counting.arXiv:1007.4395CERN-PH-TH-2010-168oai:cds.cern.ch:12811172010-07-27
spellingShingle Particle Physics - Phenomenology
Chay, Junegone
Kim, Chul
Endpoint behavior of high-energy scattering cross sections
title Endpoint behavior of high-energy scattering cross sections
title_full Endpoint behavior of high-energy scattering cross sections
title_fullStr Endpoint behavior of high-energy scattering cross sections
title_full_unstemmed Endpoint behavior of high-energy scattering cross sections
title_short Endpoint behavior of high-energy scattering cross sections
title_sort endpoint behavior of high-energy scattering cross sections
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.82.094021
http://cds.cern.ch/record/1281117
work_keys_str_mv AT chayjunegone endpointbehaviorofhighenergyscatteringcrosssections
AT kimchul endpointbehaviorofhighenergyscatteringcrosssections