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Does the `Higgs' have Spin Zero?

The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin ze...

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Detalles Bibliográficos
Autores principales: Ellis, John, Hwang, Dae Sung
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP09(2012)071
http://cds.cern.ch/record/1428413
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author Ellis, John
Hwang, Dae Sung
author_facet Ellis, John
Hwang, Dae Sung
author_sort Ellis, John
collection CERN
description The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin zero, and how this possibility could be confirmed in the near future. The excess observed in the gamma gamma final state could not have spin one, leaving zero and two as open possibilities. We calculate the angular distribution of gamma gamma pairs from the decays of a spin-two boson produced in gluon-gluon collisions, showing that is unique and distinct from the spin-zero case. We also calculate the distributions for lepton pairs that would be produced in the W W* decays of a spin-two boson, which are very different from those in Higgs decays, and note that the kinematics of the event selection used to produce the excess observed in the W W* final state have reduced efficiency for spin two.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-14284132019-09-30T06:29:59Zdoi:10.1007/JHEP09(2012)071http://cds.cern.ch/record/1428413engEllis, JohnHwang, Dae SungDoes the `Higgs' have Spin Zero?Particle Physics - PhenomenologyThe Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin zero, and how this possibility could be confirmed in the near future. The excess observed in the gamma gamma final state could not have spin one, leaving zero and two as open possibilities. We calculate the angular distribution of gamma gamma pairs from the decays of a spin-two boson produced in gluon-gluon collisions, showing that is unique and distinct from the spin-zero case. We also calculate the distributions for lepton pairs that would be produced in the W W* decays of a spin-two boson, which are very different from those in Higgs decays, and note that the kinematics of the event selection used to produce the excess observed in the W W* final state have reduced efficiency for spin two.arXiv:1202.6660KCL-PH-TH-2012-11LCTS-2012-06CERN-PH-TH-2012-058oai:cds.cern.ch:14284132012-03-01
spellingShingle Particle Physics - Phenomenology
Ellis, John
Hwang, Dae Sung
Does the `Higgs' have Spin Zero?
title Does the `Higgs' have Spin Zero?
title_full Does the `Higgs' have Spin Zero?
title_fullStr Does the `Higgs' have Spin Zero?
title_full_unstemmed Does the `Higgs' have Spin Zero?
title_short Does the `Higgs' have Spin Zero?
title_sort does the `higgs' have spin zero?
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP09(2012)071
http://cds.cern.ch/record/1428413
work_keys_str_mv AT ellisjohn doesthehiggshavespinzero
AT hwangdaesung doesthehiggshavespinzero