Cargando…

Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders

The TeV energy region is currently being explored by both the ATLAS and CMS experiments of the Large Hadron Collider and phenomena beyond the Standard Model are extensively searched for. Large fractions of the parameter space of many models have already been excluded, and the ranges covered by the s...

Descripción completa

Detalles Bibliográficos
Autores principales: Fuks, Benjamin, Proudom, Josselin, Rojo, Juan, Schienbein, Ingo
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP05(2014)045
http://cds.cern.ch/record/1667973
_version_ 1780935467443683328
author Fuks, Benjamin
Proudom, Josselin
Rojo, Juan
Schienbein, Ingo
author_facet Fuks, Benjamin
Proudom, Josselin
Rojo, Juan
Schienbein, Ingo
author_sort Fuks, Benjamin
collection CERN
description The TeV energy region is currently being explored by both the ATLAS and CMS experiments of the Large Hadron Collider and phenomena beyond the Standard Model are extensively searched for. Large fractions of the parameter space of many models have already been excluded, and the ranges covered by the searches will certainly be increased by the upcoming energy and luminosity upgrades. If new physics has to be discovered in the forthcoming years, the ultimate goal of the high-energy physics program will consist of fully characterizing the newly-discovered degrees of freedom in terms of properties such as their masses, spins and couplings. The scope of this paper is to show how the availability of polarized beams at high-energy proton-proton colliders could yield a unique discriminating power between different beyond the Standard Model scenarios. We first discuss in a model-independent way how this discriminating power arises from the differences between polarized and unpolarized parton distribution functions. We then demonstrate how polarized beams allow one not only to disentangle different production mechanisms giving the same final-state signature, but also to obtain information on the parameters of the hypothetical new physics sector of the theory. This is illustrated in the case of a particular class of scenarios leading to monotop production. We consider three specific models that could produce a monotop signature in unpolarized proton collisions, and show how they could be distinguished by means of single- and double-spin asymmetries in polarized collisions. Our results are presented for both the Large Hadron Collider operating at a center-of-mass energy of 14 TeV and a recently proposed Future Circular Collider assumed to collide protons at a center-of-mass energy of 100 TeV.
id cern-1667973
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
record_format invenio
spelling cern-16679732023-03-14T18:24:51Zdoi:10.1007/JHEP05(2014)045http://cds.cern.ch/record/1667973engFuks, BenjaminProudom, JosselinRojo, JuanSchienbein, IngoCharacterizing New Physics with Polarized Beams at High-Energy Hadron CollidersParticle Physics - PhenomenologyThe TeV energy region is currently being explored by both the ATLAS and CMS experiments of the Large Hadron Collider and phenomena beyond the Standard Model are extensively searched for. Large fractions of the parameter space of many models have already been excluded, and the ranges covered by the searches will certainly be increased by the upcoming energy and luminosity upgrades. If new physics has to be discovered in the forthcoming years, the ultimate goal of the high-energy physics program will consist of fully characterizing the newly-discovered degrees of freedom in terms of properties such as their masses, spins and couplings. The scope of this paper is to show how the availability of polarized beams at high-energy proton-proton colliders could yield a unique discriminating power between different beyond the Standard Model scenarios. We first discuss in a model-independent way how this discriminating power arises from the differences between polarized and unpolarized parton distribution functions. We then demonstrate how polarized beams allow one not only to disentangle different production mechanisms giving the same final-state signature, but also to obtain information on the parameters of the hypothetical new physics sector of the theory. This is illustrated in the case of a particular class of scenarios leading to monotop production. We consider three specific models that could produce a monotop signature in unpolarized proton collisions, and show how they could be distinguished by means of single- and double-spin asymmetries in polarized collisions. Our results are presented for both the Large Hadron Collider operating at a center-of-mass energy of 14 TeV and a recently proposed Future Circular Collider assumed to collide protons at a center-of-mass energy of 100 TeV.The TeV energy region is currently being explored by both the ATLAS and CMS experiments of the Large Hadron Collider and phenomena beyond the Standard Model are extensively searched for. Large fractions of the parameter space of many models have already been excluded, and the ranges covered by the searches will certainly be increased by the upcoming energy and luminosity upgrades. If new physics has to be discovered in the forthcoming years, the ultimate goal of the high-energy physics program will consist of fully characterizing the newly-discovered degrees of freedom in terms of properties such as their masses, spins and couplings. The scope of this paper is to show how the availability of polarized beams at high-energy proton-proton colliders could yield a unique discriminating power between different beyond the Standard Model scenarios. We first discuss in a model-independent way how this discriminating power arises from the differences between polarized and unpolarized parton distribution functions. We then demonstrate how polarized beams allow one not only to disentangle different production mechanisms giving the same final-state signature, but also to obtain information on the parameters of the hypothetical new physics sector of the theory. This is illustrated in the case of a particular class of scenarios leading to monotop production. We consider three specific models that could produce a monotop signature in unpolarized proton collisions, and show how they could be distinguished by means of single- and double-spin asymmetries in polarized collisions. Our results are presented for both the Large Hadron Collider operating at a center-of-mass energy of 14 TeV and a recently proposed Future Circular Collider assumed to collide protons at a center-of-mass energy of 100 TeV.arXiv:1403.2383CERN-PH-TH-2014-010LPSC-14-031CERN-PH-TH-2014-010LPSC-14-031oai:cds.cern.ch:16679732014-03-10
spellingShingle Particle Physics - Phenomenology
Fuks, Benjamin
Proudom, Josselin
Rojo, Juan
Schienbein, Ingo
Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders
title Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders
title_full Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders
title_fullStr Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders
title_full_unstemmed Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders
title_short Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders
title_sort characterizing new physics with polarized beams at high-energy hadron colliders
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP05(2014)045
http://cds.cern.ch/record/1667973
work_keys_str_mv AT fuksbenjamin characterizingnewphysicswithpolarizedbeamsathighenergyhadroncolliders
AT proudomjosselin characterizingnewphysicswithpolarizedbeamsathighenergyhadroncolliders
AT rojojuan characterizingnewphysicswithpolarizedbeamsathighenergyhadroncolliders
AT schienbeiningo characterizingnewphysicswithpolarizedbeamsathighenergyhadroncolliders