INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of the Upsilon(1S) Production Cross-Section in pp Collisions at √s = 7 TeV in ATLAS
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2011 p. 1 - 23
ISSN:
0370-2693
Resumen:
A measurement of the cross-section for Upsilon(1S) -> mu+mu-
production in proton-proton collisions at centre of mass energy of 7 TeV
is presented. The cross-section is measured as a function of the
Upsilon(1S) transverse momentum in two bins of rapidity, |y(Upsilon1S)|
< 1.2 and 1.2 < |y(Upsilon1S)| < 2.4. The measurement requires
that both muons have transverse momentum pT(mu) > 4 GeV and
pseudorapidity |eta(mu)| < 2.5 in order to reduce theoretical
uncertainties on the acceptance, which depend on the poorly known
polarization. The results are based on an integrated luminosity of 1.13
pb-1, collected with the ATLAS detector at the Large Hadron Collider.
The cross-section measurement is compared to theoretical predictions: it
agrees to within a factor of two with a prediction based on the NRQCD
model including colour-singlet and colour-octet matrix elements as
implemented in PYTHI