B ? K * l + l ? : Zeros of angular observables as test of standard model

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dc.contributor.author Kumar, Girish
dc.contributor.author Mahajan, Namit
dc.date.accessioned 2016-05-21T12:08:53Z
dc.date.available 2016-05-21T12:08:53Z
dc.date.issued 2016-03
dc.identifier.citation Kumar, Girish and Mahajan, Namit, B ? K * l + l ? : Zeros of angular observables as test of standard model, Physical Review D, DOI: 10.1103/PhysRevD.93.054041, vol. 93, no. 5, Mar. 2016. en_US
dc.identifier.issn 1550-7998
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevD.93.054041
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/2258
dc.description.abstract We calculate the zeros of angular observables P?4 and P?5 of the angular distribution of 4-body decay B?K?(?K?)l+l? where LHCb, in its analysis of form-factor independent angular observables, has found deviations from the standard model predictions. In the large recoil region, we obtain relations between the zeros of P?4, P?5 and the zero (s^0) of forward-backward asymmetry of lepton pair, AFB. These relations are independent of hadronic uncertainties and depend only on the Wilson coefficients. We also construct a new observable, OL,RT, whose zero in the standard model coincides with s^0, but in the presence of new physics contributions will show different behavior. Moreover, the profile of the new observable, even within the standard model, is very different from AFB. We point out that precise measurements of these zeros in the near future would provide a crucial test of the standard model and would be useful in distinguishing between different possible new physics contributions to the Wilson coefficients. en_US
dc.description.statementofresponsibility by Girish Kumar and Namit Mahajan
dc.format.extent vol. 93, no. 5
dc.language.iso en en_US
dc.publisher American Physical Society en_US
dc.subject DECAYS en_US
dc.title B ? K * l + l ? : Zeros of angular observables as test of standard model en_US
dc.type Article en_US
dc.relation.journal Physical Review D

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