Publications associated with TORCH

Measurement of the shape of the Λ0b→Λ+cμ−νμ¯ differential decay rate

Physical Review D American Physical Society 96 (2017) 112005-

D Hill, PG Jalocha, MJJ John, M Adinolfi, M Bjørn, T Evans, P Gandini, BR Gruberg Cazon, T Hadavizadeh, R Aaij, B Adeva, TH Hancock, N Harnew, NP Jurik, S Malde, AK Nandi, HL Pullen, A Rollings, S Topp-Jorgenson, M Vesterinen, GR Wilkinson

A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay Λ0b→Λ+cμ−¯νμ is reported, using data corresponding to 3  fb^−1 collected with the LHCb detector in proton-proton collisions. The Λ+cμ−¯νμ(+anything) final states are reconstructed through the detection of a muon and a Λ+c baryon decaying into pK−π+, and the decays Λ0b→Λ+cπ+π−μ−νμ¯ are used to determine contributions from Λ0b→Λ*+cμ−ν¯ μ decays. The measured dependence of the differential decay rate upon the squared four-momentum transfer between the heavy baryons, q2, is compared with expectations from heavy-quark effective theory and from unquenched lattice QCD predictions.

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