Measurement of the fragmentation fraction ratio fs/fd and its dependence on B meson kinematics

By R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, Federico Alessio and 489 more. 2013

264 citations recorded by the source corpus.

A bstractThe relative production rate of $ B_s^0 $ and B0 mesons is determined with the hadronic decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B0 → D−K+. The measurement uses data corresponding to 1.0 fb−1 of pp collisions at a centre-of-mass energy of $ \sqrt{s}=7 $ TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, fs/fd, is measured to be 0.238 ± 0.004 ± 0.015 ± 0.021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain fs/fd = 0.256 ± 0.020. The dependence of fs/fd on the transverse momentum and pseudorapidity of the B meson is determined using the decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B0 → D−π+. There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B0 → D−K+ and B0 → D−π+ is measured to be 0.0822 ± 0.0011 (stat) ± 0.0025 (syst).

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8f1a1f281530910e8b5381fcb67401402a472cc5

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In Nuclear and High Energy Physics

Citations in the corpus

Differential branching fraction and angular analysis of the decay B0 → K∗0μ+μ− (2013, methodology): “The rate of the decay Bs→ K∗0μ+μ− is estimated using the fragmentation fraction fs/fd [21] and assuming the branching fraction of this decay is suppressed by the ratio of CKM elements |Vtd/Vts|(2) with respect to B0→ K∗0μ+μ−.”
Expression of interest for the CODEX-b detector (2019, background): “fraction of b quarks hadronising to a B is taken to be 40% [192].”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “The current systematic uncertainty is dominated by sources external to the analysis, such as the relative uncertainty associated with the b-quark fragmentation probability ratio, fs/fd [1089], followed by the branching fractions of the normalisation modes and less significant systematics arising fro”
Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era (2018, methodology): “8% relative uncertainty associated with the b-quark fragmentation probability ratio (fs/fd) [265] followed by approximately 3% from the branching fractions of the normalisation modes, 2% from particle identification and 2% from track reconstruction.”