An analysis of the bottom baryon decay is performed to measure the Λb polarization and three angular parameters in data from pp collisions at sqrt(s) of 7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.00 0.06 stat 0.06ðyst and the parity-violating asymmetry parameter is determined to be 0.14 0.14stat 0.10syst. The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.
Measurement of the Λb polarization and angular parameters in Λb →j /ψ Λ decays from pp collisions at s =7 and 8 TeV
Ravera, F.;Meridiani, P.;Amapane, N.;Argiro, S.;Bellan, R.;Costa, M.;Covarelli, R.;Kiani, B.;Migliore, E.;Monaco, V.;Monteil, E.;Obertino, M. M.;Pacher, L.;Pinna Angioni, G. L.;Romero, A.;Sacchi, R.;Sola, V.;Solano, A.;Rumerio, P.;
2018-01-01
Abstract
An analysis of the bottom baryon decay is performed to measure the Λb polarization and three angular parameters in data from pp collisions at sqrt(s) of 7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.00 0.06 stat 0.06ðyst and the parity-violating asymmetry parameter is determined to be 0.14 0.14stat 0.10syst. The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.File in questo prodotto:
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