A search for the standard model Higgs boson is performed in the diphoton decay channel. The data used correspond to an integrated luminosity of 4:9 fb 1 collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of sqrt= 7 TeV. In the diphoton mass range 110–150 GeV, the largest excess with respect to the background-only hypothesis is observed at 126.5 GeV, with a local significance of 2.8 standard deviations. Taking the look-elsewhere effect into account in the range 110–150 GeV, this significance becomes 1.5 standard deviations. The standard model Higgs boson is excluded at 95% confidence level in the mass ranges of 113–115 GeV and 134.5–136 GeV.
Aielli, G., Camarri, P., DI CIACCIO, A., Santonico, R., [et, A. (2012). Search for the standard model Higgs Boson in the diphoton decay channel with 4.9 fb(-1) of pp collision data at root s=7 TeV with ATLAS. PHYSICAL REVIEW LETTERS, 108(11) [10.1103/PhysRevLett.108.111803].
Search for the standard model Higgs Boson in the diphoton decay channel with 4.9 fb(-1) of pp collision data at root s=7 TeV with ATLAS
AIELLI, GIULIO;CAMARRI, PAOLO;DI CIACCIO, ANNA;SANTONICO, RINALDO;
2012-01-01
Abstract
A search for the standard model Higgs boson is performed in the diphoton decay channel. The data used correspond to an integrated luminosity of 4:9 fb 1 collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of sqrt= 7 TeV. In the diphoton mass range 110–150 GeV, the largest excess with respect to the background-only hypothesis is observed at 126.5 GeV, with a local significance of 2.8 standard deviations. Taking the look-elsewhere effect into account in the range 110–150 GeV, this significance becomes 1.5 standard deviations. The standard model Higgs boson is excluded at 95% confidence level in the mass ranges of 113–115 GeV and 134.5–136 GeV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
