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  • B ? K * l + l ? : Zeros of angular observables as test of standard model 
    Kumar, Girish; Mahajan, Namit (American Physical Society, 2016-03)
    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 ...
  • B → D (∗) τν excesses in ALRSM constrained from B, D decays and D0 − D0 mixing 
    Hati, Chandan; Kumar, Girish; Mahajan, Namit (Springer Berlin Heidelberg, 2016-01)
    Recent experimental results from the LHCb, BaBar and Belle collaborations on the semitauonic decays of B meson, B¯¯¯¯→D(∗)τν¯¯¯, showing a significant deviation from the Standard Model (SM), hint towards a new physics ...
  • B?K2*(1430)?+?? distributions at large recoil in the Standard Model and beyond 
    Das, Diganta; Kindra, Bharti; Kumar, Girish; Mahajan, Namit (American Physical Society, 2019-05)
    We study the rare decay B?K?2(1430)(?K?)?+?? in the Standard Model and beyond. Working in the transversity basis, we exploit the relations between the heavy-to-light form factors in the limit of heavy quark (mb??) and large ...
  • Gravitino production in a thermal universe revisited 
    Arya, Richa; Mahajan, Namit; Rangarajan, Raghavan (Elsevier, 2017-09)
    We study the production of spin 1/2 gravitinos in a thermal Universe. Taking into account supersymmetry breaking due to the finite thermal energy density of the Universe, there is a large enhancement in the cross section ...

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