INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Search for New Physics in Dijet Mass and Angular Distributions in pp Collisions at √s = 7 TeV Measured with the ATLAS Detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
NEW JOURNAL OF PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2011 p. 1 - 23
ISSN:
1367-2630
Resumen:
A search for new interactions and resonances produced
in LHC proton-proton (pp) collisions at a centre-of-mass energy sqrt(s)=
7 TeV has been performed with the ATLAS detector. Using a data set with
an integrated luminosity of 36 pb-1 dijet mass and angular
distributions have been measured up to dijet masses of \sim 3.5 TeV and
found to be in good agreement with Standard Model predictions. This
analysis sets limits at 95% C.L. on various models for new physics: an
excited quark is excluded with mass between 0.60 and 2.64 TeV, an
axigluon hypothesis is excluded for axigluon masses between 0.60 and
2.10 TeV and Randall-Meade quantum black holes are excluded in models
with six extra space-time dimensions for quantum gravity scales between
0.75 and 3.67 TeV. Production cross section limits as a function of
dijet mass are set using a simplified Gaussian signal model to
facilitate comparisons with other hypotheses. Analysis of the dijet
angular distribution using a novel technique 18 simultaneously employing
the dijet mass excludes quark contact interactions with a compositeness
scale {\Lambda} below 9.5 TeV.