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E.Straticiuc, M.Straumann, U.Strokov, S.Sun, J.Sun, L.Sun, Y.Swientek, K.Szabelski, A.Szumlak, T.Szymanski, M.T'Jampens, S.Tang, Z.Tekampe, T.Tellarini, G.Teubert, F.Thomas, E.van Tilburg, J.Tilley, M. J.Tisserand, VTobin, M.Tolk, S.Tomassetti, L.Tonelli, D.Tou, D. Y.Tourinho Jadallah Aoude, R.Tournefier, E.Traill, M.Tran, M. T.Trisovic, A.Tsaregorodtsev, A.Tuci, G.Tully, A.Tuning, N.Ukleja, A.Usachov, A.Ustyuzhanin, A.Uwer, U.Vagner, A.Vagnoni, V.Valassi, A.Valat, S.Valenti, G.Gomez, R. VazquezVazquez Regueiro, P.Vecchi, S.van Veghel, M.Velthuis, J. J.Veltri, M.Veneziano, G.Venkateswaran, A.Vernet, M.Veronesi, M.Vesterinen, M.Barbosa, J. V. VianaVieira, D.Vieites Diaz, M.Viemann, H.Vilasis-Cardona, X.Vitkovskiy, A.Vitti, M.Volkov, V.Vollhardt, A.Vom Bruch, D.Voneki, B.Vorobyev, A.Vorobyev, V.Voropaev, N.de Vries, J. A.Sierra, C. VazquezWaldi, R.Walsh, J.Wang, J.Wang, M.Wang, Y.Wang, Z.Ward, D. R.Wark, H. M.Watson, N. K.Websdale, D.Weiden, A.Weisser, C.Whitehead, M.Wilkinson, G.Wilkinson, M.Williams, IWilliams, M. R. J.Williams, M.Williams, T.Wilson, F. F.Winn, M.Wislicki, W.Witek, M.Wormser, G.Wotton, S. A.Wyllie, K.Xiao, D.Xie, Y.Xu, A.Xu, M.Xu, Q.Xu, Z.Yang, Z.Yao, Y.Yeomans, L. E.Yin, H.Yu, J.Yuan, X.Yushchenko, O.Zarebski, K. A.Zavertyaev, M.Zhang, D.Zhang, L.Zhang, W. C.Zhang, Y.Zhelezov, A.Zheng, Y.Zhu, X.Zhukov, VZonneveld, J. B.Zucchelli, S.2019-06-182019-06-182019-06-182019-03-2210.1103/PhysRevD.99.052006https://infoscience.epfl.ch/handle/20.500.14299/158196WOS:000462907300001The first measurement of the production rate of Xi(-)(b) baryons in pp collisions relative to that of Lambda(0 )(b)baryons is reported, using data samples collected by the LHCb experiment, and corresponding to integrated luminosities of 1, 2 and 1.6 fb(-1) at root s = 7, 8 and 13 TeV, respectively. In the kinematic region 2 < eta < 6 and p(T) < 20 GeV/c, we measure f(Xi b-)/f(Lambda b0) B(Xi(-)(b)-> J/psi Xi(-))/B(Lambda(0)(b)-> J/psi Lambda)= (10.8 +/- 0.9 +/- 0.8) x 10(-2) [root s = 7,8 TeV], f(Xi b-)/f(Lambda b0) B(Xi(-)(b)-> J/psi Xi(-))/B(Lambda(0)(b)-> J/psi Lambda) =(13.1 +/- 1.1 +/- 1.0) x 10(-2) [root s = 13 TeV], where and f(Xi b-) and f(Lambda)(b0) the fragmentation fractions of b quarks into Xi(-)(b) and Lambda(0)(b) baryons, respectively; B represents branching fractions; and the uncertainties are due to statistical and experimental systematic sources. The values of f(Xi b-)/f(Lambda b0) are obtained by invoking SU(3) symmetry in the Xi(-)(b)-> J/psi Xi(-) and Lambda(0)(b)-> J/psi Lambda decays. Production asymmetries between Xi(-)(b) and (Xi) over bar (+)(b) baryons are also reported. The mass of the Xi(-)(b) baryon is also measured relative to that of the Lambda(0)(b) baryon, from which it is found that m(Xi(-)(b)) = 5796.70 +/- 0.39 +/- 0.15 +/- 0.17 MeV/c(2), where the last uncertainty is due to the precision on the known Lambda(0)(b) mass. This result represents the most precise determination of the Xi(-)(b) mass.Astronomy & AstrophysicsPhysics, Particles & FieldsAstronomy & AstrophysicsPhysicsdiscarding 1/n(c)pp collisionsdecaysbeautylambda(0)(b)ruletoolMeasurement of the mass and production rate of Xi(-)(b)( )baryonstext::journal::journal article::research article