INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Search for extra dimensions in diphoton events using proton-proton collisions recorded at √s =7 TeV with the ATLAS detector at the LHC
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
NEW JOURNAL OF PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2013 vol. 15 p. 1 - 25
ISSN:
1367-2630
Resumen:
The large difference between the Planck scale and the electroweak scale,
known as the hierarchy problem, is addressed in certain models through
the postulate of extra spatial dimensions. A search for evidence of
extra spatial dimensions in the diphoton channel has been performed
using the full set of protonproton collisions at
recorded in 2011 with the ATLAS detector at the CERN Large Hadron
Collider. This dataset corresponds to an integrated luminosity of 4.9 fb−1.
The diphoton invariant mass spectrum is observed to be in good
agreement with the Standard Model expectation. In the context of the
model proposed by ArkaniHamed, Dimopoulos and Dvali, 95% confidence
level lower limits of between 2.52 and 3.92 TeV are set on the
ultraviolet cutoff scale MS depending on the
number of extra dimensions and the theoretical formalism used. In the
context of the RandallSundrum model, a lower limit of 2.06 (1.00) TeV
at 95% confidence level is set on the mass of the lightest graviton for
couplings of .
Combining with the ATLAS dilepton searches based on the 2011 data, the
95% confidence level lower limit on the RandallSundrum graviton mass is
further tightened to 2.23 (1.03) TeV for .