Central exclusive production in the ALICE experiment at the LHC

The ALICE experiment at the Large Hadron Collider (LHC) at CERN consists of a central barrel, a muon spectrometer and additional detectors for trigger and event classification purposes. The low transverse momentum threshold of the central barrel gives ALICE a unique opportunity to study the low mass sector of central exclusive production at the LHC.Comment: 5 page

Photon-hadron and photon-photon collisions in ALICE

A review is given on photon-hadron and photon-photon collisions in the ALICE experiment. The physics motivation for studying such reactions is outlined, and the results obtained in proton-lead and lead-lead collisions in Run 1 of the LHC are discussed. The improvement in detector rapidity coverage due to a newly added detector system is presented. The ALICE perspectives for data taking in LHC Run II are summarised.Comment: 10 pages, 10 figures, Proceedings PHOTON 2015 Conference, 15-19 June, 2015, Budker Institute, Novosibirs

Overview of ALICE results in pp, pA and AA collisions

The ALICE experiment at the Large Hadron Collider (LHC) at CERN is optimized for recording events in the very large particle multiplicity environment of heavy-ion collisions at LHC energies. The ALICE collaboration has taken data in Pb-Pb collisions in Run I and Run II at nucleon-nucleon center-of-mass energies $\sqrt{s_{\text{NN}}}$ = 2.76 and \mbox{5.02 TeV}, respectively, and in pp collisions at center-of-mass energies $\sqrt{s}$ = 0.9, 2.76, 5.02, 7, 8 and 13 TeV. The asymmetric system p-Pb was measured at a center-of-mass energy $\sqrt{s_{\text{NN}}}$ = 5.02 TeV. Selected physics results from the analysis of these data are presented, and an outline of the ALICE prospects for Run III is given.Comment: 12 pages, 10 figures, Invited Talk at XXIII International Baldin Seminar on High Energy Physics Problems, September 19-24, 2016, Dubna, to be published in Seminar Proceeding

Central Meson Production in ALICE

The ALICE experiment at the Large Hadron Collider (LHC) at CERN consists of a central barrel, a muon spectrometer and of additional detectors for trigger and event classification purposes. The low transverse momentum threshold of the central barrel gives ALICE a unique opportunity to study the low mass sector of central production at the LHC. First analysis results of meson production in double gap events in proton-proton collisions at $\sqrt{s}$ = 7 TeV and in PbPb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV are presented.Comment: To appear in Proceedings of XIV International Conference on Hadron Spectroscopy, june 13-17, 2011, Munich, 6 pages, 6 figure

Exclusive diffractive resonance production in proton-proton collisions at high energies

A model for exclusive diffractive resonance production in proton-proton collisions at high energies is presented. This model is able to predict double differential distributions with respect to the mass and the transverse momentum of the produced resonance in the mass region $\sqrt{M^2}\le$5 GeV. The model is based on convoluting the Pomeron distribution in the proton with the Pomeron-Pomeron-meson total cross section. The Pomeron-Pomeron-meson cross section is saturated by direct-channel contributions from the Pomeron as well as from two different $f$ trajectories, accompanied by the isolated f$_0(500)$ resonance dominating the $\sqrt{M^{2}} \leq$ GeV region. A slowly varying background is taken into account.Comment: 11 pages, 14 figures. arXiv admin note: text overlap with arXiv:1512.0497

Charge exchange reaction by Reggeon exchange and W+^{+}W−^{-}-fusion

Charge exchange reactions at high energies are examined. The existing cross section data on the Reggeon induced reaction pp $\rightarrow$ n + $\Delta^{++}$ taken at the ZGS and ISR accelerators are extrapolated to the energies of the RHIC and LHC colliders. The interest in the charge exchange reaction induced by $W^{\pm}$-fusion is presented, and the corresponding QCD-background is examined.Comment: 4 pages, 4 figures, to appear in Proceedings Diffraction 2014, Primosten, Croatia, sept 10-16, 201

The ALICE detector at LHC

The ALICE experiment at the Large Hadron Collider LHC is presented, and an overview of its physics program is given. A few specific observables are discussed in order to illustrate the physics potential of ALICE.Comment: 4 pages, Proceedings of XIth International Conference on Elastic and Diffractive Scattering, Blois, France, may 200