Diffraction 2016

Session

Diffraction in hadron-hadron collisions - experiment (III)

6 Sept 2016, 11:20

Santa Tecla Palace Hotel, Acireale (Catania, Sicily)

Conveners

Diffraction in hadron-hadron collisions - experiment (III)

• Risto Orava (Helsinki Inst. of Physics and Univ. of Helsinki, CERN)

156. Hadron Spectroscopy in Double Pomeron Exchange Experiments : a Review

Michael Albrow Albrow (Fermilab)

06/09/2016, 11:20

Diffraction in hadron-hadron collisions (experiment)

Central exclusive production in hadron-hadron collisions at high energies, for example p + p → p + X + p where the + represents a large rapidity gap, is a valuable process for spectroscopy of mesonic states X. At collider energies the gaps can be large enough to be dominated by pomeron exchange, and then the quantum numbers of state X are limited. Isoscalar JPC = 0++ and 2++ mesons are...

88. Measurements of diffractive and exclusive processes with ATLAS

Mateusz Dyndal (ATLAS)

06/09/2016, 11:50

Diffraction in hadron-hadron collisions (experiment)

The ATLAS collaboration has carried out a study of diffractive dijet production at 7 TeV pp collisions at the LHC, i.e. events with a hadronic system containing at least two jets in addition to a large region of pseudorapidity devoid of hadronic activity. The data distributions are compared with Monte Carlo models and the rapidity gap survival probability has been estimated in the...

93. Exclusive central pi^+pi^- production in proton-proton collisions at ps = 7 TeV

Mohsen Khakzad (IPM)

06/09/2016, 12:10

Diffraction in hadron-hadron collisions (experiment)

We report a measurement of the exclusive production of pairs of charged pions in proton-proton collisions, dominated by the process pp->p(*)pi^+pi^-p(*), where p(*) stands for a diffractively dissociated proton, the p+p- pair is emitted at central rapidities y, and the incident protons stay intact or dissociate without detection p(*). The measurement is performed with the CMS detector at...

141. Central Exclusive K+K- production in CDF

Antonio Gioiosa (LE)

06/09/2016, 12:30

Diffraction in hadron-hadron collisions (experiment)

We present new CDF data on exclusive K+ K- and p-pbar production. Data were taken at sqrt(s) = 1960 GeV and 900 GeV in low pile-up conditions. Events were selected with exactly two well-measured central tracks with PT > 300 MeV/c and |eta| < 0.8 and no evidence for other particles (including calorimeter clusters) in the range -5.3 < eta < +5.3, signifying two rapidity gaps exceeding Delta-eta...

103. Recent results on Central Exclusive Production with the STAR detector at RHIC

Rafal Sikora (AGH University of Science and Technology)

06/09/2016, 12:50

Diffraction in hadron-hadron collisions (experiment)

The STAR experiment at the Relativistic Heavy Ion Collider (RHIC) performs studies of diffractive processes with the focus on the exclusive production of particles in central range of rapidity. In 2015 STAR collected 18~pb$^{-1}$ of data in polarized proton+proton collisions at $\sqrt{s}$~=200~GeV to measure Central Exclusive Production process $pp\to pXp$ (CEP) through Double Pomeron Exchange...

89. Status of the AFP project in ATLAS

Marek Tasevsky (ATLAS)

06/09/2016, 13:10

Diffraction in hadron-hadron collisions (experiment)

Detector description and experience with first data will be reported.