Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders

Evidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product...

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Detalles Bibliográficos
Autores principales: Banerjee, S., Kalinowski, J., Kotlarski, W., Przedzinski, T., Was, Z.
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-013-2313-1
http://cds.cern.ch/record/1499786
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author Banerjee, S.
Kalinowski, J.
Kotlarski, W.
Przedzinski, T.
Was, Z.
author_facet Banerjee, S.
Kalinowski, J.
Kotlarski, W.
Przedzinski, T.
Was, Z.
author_sort Banerjee, S.
collection CERN
description Evidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product directions. The TauSpinner algorithm is used to re-weight distributions from qqbar -> gamma/Z -> tau+ tau- sample to simulate a spin-2 state exchange. The method is based on supplementing the Standard Model matrix elements with those arising from presence of a new interaction. Studies with simulated samples demonstrate the discrimination power between these spin hypotheses based on data collected at the Large Hadron Collider.
id cern-1499786
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14997862023-03-14T17:54:04Zdoi:10.1140/epjc/s10052-013-2313-1http://cds.cern.ch/record/1499786engBanerjee, S.Kalinowski, J.Kotlarski, W.Przedzinski, T.Was, Z.Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron CollidersParticle Physics - PhenomenologyEvidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product directions. The TauSpinner algorithm is used to re-weight distributions from qqbar -> gamma/Z -> tau+ tau- sample to simulate a spin-2 state exchange. The method is based on supplementing the Standard Model matrix elements with those arising from presence of a new interaction. Studies with simulated samples demonstrate the discrimination power between these spin hypotheses based on data collected at the Large Hadron Collider.Evidence of a new particle with mass ∼125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product directions. The TauSpinner algorithm is used to re-weight distributions from sample to simulate a spin-2 state exchange. The method is based on supplementing the Standard Model matrix elements with those arising from presence of a new interaction. Studies with simulated samples demonstrate the discrimination power between these spin hypotheses based on data collected at the Large Hadron Collider. PDF = http://www.springerlink.com/Evidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product directions. The TauSpinner algorithm is used to re-weight distributions from qqbar -> gamma/Z -> tau+ tau- sample to simulate a spin-2 state exchange. The method is based on supplementing the Standard Model matrix elements with those arising from presence of a new interaction. Studies with simulated samples demonstrate the discrimination power between these spin hypotheses based on data collected at the Large Hadron Collider.arXiv:1212.2873IFJPAN-IV-2012-13CERN-PH-TH-2012-347IFJPAN-IV-2012-13CERN-PH-TH-2012-347oai:cds.cern.ch:14997862012-12-13
spellingShingle Particle Physics - Phenomenology
Banerjee, S.
Kalinowski, J.
Kotlarski, W.
Przedzinski, T.
Was, Z.
Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
title Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
title_full Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
title_fullStr Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
title_full_unstemmed Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
title_short Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
title_sort ascertaining the spin for new resonances decaying into tau+ tau- at hadron colliders
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s10052-013-2313-1
http://cds.cern.ch/record/1499786
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AT kalinowskij ascertainingthespinfornewresonancesdecayingintotautauathadroncolliders
AT kotlarskiw ascertainingthespinfornewresonancesdecayingintotautauathadroncolliders
AT przedzinskit ascertainingthespinfornewresonancesdecayingintotautauathadroncolliders
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