LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$

This note describes the selection of the Bs->phi(KK)phi(KK) decay channel in LHCb experiment using data produced in Monte Carlo simulation. We expect about 3.1 k signal events in 2 fb^-1 of data with an upper limit on the background to signal ratio, B/S < 0.8 at 90% CL. We also present the sen...

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Detalles Bibliográficos
Autores principales: Amato, S, McCarron, J, Muheim, F, Souza de Paula, B, Xie, Y
Lenguaje:eng
Publicado: 2007
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1035462
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author Amato, S
McCarron, J
Muheim, F
Souza de Paula, B
Xie, Y
author_facet Amato, S
McCarron, J
Muheim, F
Souza de Paula, B
Xie, Y
author_sort Amato, S
collection CERN
description This note describes the selection of the Bs->phi(KK)phi(KK) decay channel in LHCb experiment using data produced in Monte Carlo simulation. We expect about 3.1 k signal events in 2 fb^-1 of data with an upper limit on the background to signal ratio, B/S < 0.8 at 90% CL. We also present the sensitivity of this channel to new physics. There are two approaches to test the Standard Model (SM) using this channel: measure the CP asymmetries in a model-independent way and compare them with their SM predictions; or simply assume the SM is valid, measure the total weak phase based on the SM and compare the measurement with the SM prediction. We adopt the latter for this study. The total weak phase can be measured to a statistical precision of 0.11 in 2 fb^-1 of data and 0.05 in 10 fb^-1 of data. This channel thereffore provides a good opportunity to search for physics beyond the SM with new CP-violating phases.
id cern-1035462
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
record_format invenio
spelling cern-10354622019-09-30T06:29:59Zhttp://cds.cern.ch/record/1035462engAmato, SMcCarron, JMuheim, FSouza de Paula, BXie, YLHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$Detectors and Experimental TechniquesThis note describes the selection of the Bs->phi(KK)phi(KK) decay channel in LHCb experiment using data produced in Monte Carlo simulation. We expect about 3.1 k signal events in 2 fb^-1 of data with an upper limit on the background to signal ratio, B/S < 0.8 at 90% CL. We also present the sensitivity of this channel to new physics. There are two approaches to test the Standard Model (SM) using this channel: measure the CP asymmetries in a model-independent way and compare them with their SM predictions; or simply assume the SM is valid, measure the total weak phase based on the SM and compare the measurement with the SM prediction. We adopt the latter for this study. The total weak phase can be measured to a statistical precision of 0.11 in 2 fb^-1 of data and 0.05 in 10 fb^-1 of data. This channel thereffore provides a good opportunity to search for physics beyond the SM with new CP-violating phases.LHCb-2007-047CERN-LHCb-2007-047oai:cds.cern.ch:10354622007-05-31
spellingShingle Detectors and Experimental Techniques
Amato, S
McCarron, J
Muheim, F
Souza de Paula, B
Xie, Y
LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$
title LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$
title_full LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$
title_fullStr LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$
title_full_unstemmed LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$
title_short LHCb's sensitivity to New CP-violating Phases in the Decay $B_s \to \phi\phi$
title_sort lhcb's sensitivity to new cp-violating phases in the decay $b_s \to \phi\phi$
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1035462
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AT mccarronj lhcbssensitivitytonewcpviolatingphasesinthedecaybstophiphi
AT muheimf lhcbssensitivitytonewcpviolatingphasesinthedecaybstophiphi
AT souzadepaulab lhcbssensitivitytonewcpviolatingphasesinthedecaybstophiphi
AT xiey lhcbssensitivitytonewcpviolatingphasesinthedecaybstophiphi

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