PLHC2011 - Physics at LHC 2011

Session

2F Parallel - Hard QCD and Diffractive

7 Jun 2011, 17:15

Perugia Congress Center GIO

90. Multijets and the internal structure of jets measurements at ATLAS (15'+5')

Bilge Demirkoz (IFAE, Barcelona)

07/06/2011, 17:15

Studies of the internal structure of jets, and of events with high jet multiplicities, provide a stringent test of QCD. These important standard model process may also hide, or reveal, new physics. We present measurements of multijet cross sections and distributions, of the subjet structure in high-pT jets, and of the distribution of charged particle inside jets.

91. Measurements of forward energy flow and forward jet production with CMS (15'+5')

Alexander Flossdorf (DESY)

07/06/2011, 17:35

We present measurements of the forward (3 < |eta| < 5) energy flow in minimum bias events and in events with either hard jets or W and Z bosons produced at central rapidities, as well as measurements of the inclusive forward jet cross section and of associated production of forward and central jets. Results are compared to MC models with different parameter tunes for the description of the...

92. Higher-order effects in QCD and EW cross sections at the LHC (20'+5')

Radja Boughezal (Argonne NL)

07/06/2011, 17:55

93. Diffraction and the Inelastic Cross Section measurements with ATLAS (15'+5')

Oldrich Kepka (IP Prague)

07/06/2011, 18:20

A measurement of the inelastic cross section for proton-proton collisions at 7 TeV centre-of-mass energy is present. In addition the separate contributions of single- and double-diffractive dissociation are measured, and the differential cross section as a function of rapidity gap is presented.

94. Exclusive measurements (di-leptons and vector mesons) at CMS (15'+5')

Krzysztof Piotrzkowski (Universite Catholique de Louvain)

07/06/2011, 18:40

A measurement of exclusive production of muons pairs in pp collisions at \sqrt{s} = 7 TeV is presented. Events are selected requiring the observation of two muons and no other activity in the CMS detector. Single differential cross sections are obtained as function of the dimuon transverse momentum, invariant mass and acoplanarity for dimuon pairs with an invariant mass above 11 GeV. Data are...

95. Exclusive dimuon measurements with LHCb (15'+5')

Valentin Niess (LPC-Inst. Nat. Phys. Nucl. et P.)

07/06/2011, 19:00

We report on studies of exclusive dimuon production, using LHCb experimental data. Muon pairs can be exclusively produced by two-photon fusion (a QED process ideally suited to obtaining a precise integrated luminosity measure), or by resonance production. We show results for exclusive dimuon production, and first observations of the exclusive J/Psi, Psi(2S) and Chi_c states, obtained with 37...