Measurement of the fraction of $\Upsilon(1S)$ originating from $\chi_b(1P)$ decays in $pp$ collisions at $\sqrt{s} = 7$ TeV - INSPIRE

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Measurement of the fraction of $\Upsilon(1S)$ originating from $\chi_b(1P)$ decays in $pp$ collisions at $\sqrt{s} = 7$ TeV

LHCb

Collaboration

Sep, 2012

15 pages

Published in:

JHEP 11 (2012) 031

e-Print:

1209.0282 [hep-ex]

DOI:

10.1007/JHEP11(2012)031

Report number:

CERN-PH-EP-2012-237,
LHCB-PAPER-2012-015

Experiments:

CERN-LHC-LHCb

View in:

reference search47 citations

Citations per year

Abstract: (arXiv)

The production of \chib1P mesons in

pp

collisions at a centre-of-mass energy of 7\tev is studied using 32\invpb of data collected with the \lhcb detector. The \chib1P mesons are reconstructed in the decay mode \chib1P \to \Y1S\g \to \mumu\g. The fraction of \Y1S originating from \chib1P decays in the \Y1S transverse momentum range 6 < \pt^{\Y1S} < 15\gevc and rapidity range 2.0 < y^{\Y1S} < 4.5 is measured to be

(20.7\pm 5.7\pm 2.1^{+2.7}_{-5.4})%

, where the first uncertainty is statistical, the second is systematic and the last gives the range of the result due to the unknown \Y1S and \chib1P polarizations.

Note:

15 pages, 3 figures

p p: scattering
chi/b1(9890): hadroproduction
transverse momentum: dependence
Upsilon(9460): rapidity
chi/b1(9890): radiative decay
Upsilon(9460): yield
LHC-B
experimental results
CERN LHC Coll
p p --> chi/b1(9890) anything

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