Details

Autor(en) / Beteiligte

• Aaji, R

Titel

Measurement of b hadron production fractions in 7 TeV pp collisions

Ist Teil von

• Physical review. D, Particles, fields, gravitation, and cosmology, 2012-02, Vol.85 (3)

Ort / Verlag

American Physical Society

Erscheinungsjahr

2012

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• (ProQuest: ... denotes formulae and/or non-USASCII text omitted) Measurements of b hadron production ratios in proton-proton collisions at a center-of-mass energy of 7 TeV with an integrated luminosity of 3 pb super(-1) are presented. We study the ratios of strange B meson to light B meson production [functionof] sub(s)/([functionof] sub(u) + [functionof] sub(d)) and ... baryon to light B meson production [functionof] sub([Lambda])b/([functionof] sub(u) + [functionof] sub(d)) as a function of the charmed hadron-muon pair transverse momentum p sub(T) and the b hadron pseudorapidity [eta], for p sub(T) between 0 and 14 GeV and [eta] between 2 and 5. We find that [functionof] sub(s)/([functionof] sub(u) + [functionof] sub(d)) is consistent with being independent of p sub(T) and [eta], and we determine ..., where the first error is statistical and the second systematic. The corresponding ratio [functionof] sub([Lambda])b/([functionof] sub(u) + [functionof] sub(d)) is found to be dependent upon the transverse momentum of the charmed hadron-muon pair, [functionof] sub([Lambda])b/([functionof] sub(u) + [functionof] sub(d)) = (0.404 + or - 0.017(stat) + or - 0.027(syst) + or - 0.105(Br)), where Br reflects an absolute scale uncertainty due to the poorly x [1 - (0.031 + or - 0.004(stat) + or - 0.003(syst)) x p sub(T)(GeV)] known branching fraction ... We extract the ratio of strange B meson to light neutral B meson production [functionof] sub(s)/[functionof] sub(d) by averaging the result eported here with two previous measurements derived from the relative abundances of ... to B super(0 arrow right )D super(+)K super(-) and B super(0) arrow right a D super(+)[pi] super(-). We obtain ...