PHOTON 2019 - International Conference on the Structure and the Interactions of the Photon. Satellite Workshop: Photon Physics and Simulation at Hadron Colliders.

Session

Gamma-Hadron Collisions

3 Jun 2019, 11:30

Bruno Touschek Auditorium (INFN-LNF, Italy)

Conveners

Gamma-Hadron Collisions

• Marco Battaglieri (GE)
• Aurore Courtoy (Instituto de Física, UNAM)

Gamma-Hadron Collisions

• Aurore Courtoy (Instituto de Física, UNAM)
• Marco Battaglieri (GE)

Gamma-Hadron Collisions

• Aurore Courtoy (Instituto de Física, UNAM)
• Marco Battaglieri (GE)

55. Spectroscopy of light quarks

Emilie Passemar (Indiana University/JLab)

03/06/2019, 11:30

Gamma-Hadron Collisions

Talk

In this talk we will review some recent progress on light quark spectroscopy
coming from $\eta$ and $\eta$' physics.

22. Heavy quark spectroscopy

Alessandro Pilloni (ROMA1)

03/06/2019, 12:00

Gamma-Hadron Collisions

Talk

I will review the status of heavy quark spectroscopy, in particular the XYZ and pentaquark candidates.

51. Nucleon structure in lepton-nucleon interactions

Charlotte Van Hulse

03/06/2019, 12:30

Gamma-Hadron Collisions

Various measurements of photoproduction in lepton-nucleon interactions are presented, along with their theoretical interpretations. These include spin-independent measurements of inclusive charm and beauty production, isolated photons and jets as well as exclusively produced hadrons. Results of hadron photoproduction in data taken with polarised leptons and nucleons are shown also.

46. Light dark states with electromagnetic form factors

Xiaoyong Chu (Institute of High Energy Physics, Vienna)

03/06/2019, 13:00

Gamma-Hadron Collisions

Talk

There may exist new sub-GeV particles, χ, which are electrically neutral but couple to the electromagnetic current via higher-dimensional operators. This talk focus on the possible detection of light state coupled to the photon through magnetic- and electric-dipole moments, or carrying an anapole moment or charge radius.
New constraints, as well as future sensitivities, on the existence of...

52. Status of the anomalous magnetic moment of the muon in spring 2019

Pere Masjuan (Johannes Gutenberg-Universität Mainz, Institute für Kernphysik)

03/06/2019, 15:00

Gamma-Hadron Collisions

Talk

In this talk we review the recent progress on the numerical determination of the hadronic contributions to the anomalous magnetic moment of the muon and we discuss the role of experimental data on the accuracy of its determination. Special emphasis on the light-by-light scattering contribution and on its main contribution, the pseudoscalar piece, is made. A state-of-the-art deviation between...

41. Gravitational form factors & internal forces in hadrons

Peter Schweitzer (UConn)

03/06/2019, 15:30

Gamma-Hadron Collisions

Talk

The gravitational form factors of hadrons can be studied through hard-exclusive reactions, give access to the "last global unknown property" D-term, and promise insights on the internal forces inside hadrons from a unique perspective through their interpretation in terms of energy-momentum tensor densities. The current experimental and theoretical status is reviewed.

37. Combination and QCD analysis of charm and beauty production cross-section measurements in deep inelastic ep scattering at HERA

Uri Karshon (Weizmann Institute)

03/06/2019, 16:00

Gamma-Hadron Collisions

Talk

Measurement of open charm and beauty production cross sections in ep deep inelastic scattering (DIS) at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in a restricted kinematic range. Perturbative QCD calculations are compared to the combined data. Next-to-leading order QCD analysis is performed using these data together with combined inclusive HERA...

32. Photoproduction of penta-quark states: a theoretical perspective

Giancarlo Rossi (University of Roma Tor Vergata)

04/06/2019, 14:45

Gamma-Hadron Collisions

Talk

The 2015 LHCb discovery of an exotic structure (denoted by $P_c^{+}$) decaying in $J/\psi p$ and conjectured to be a penta-quark state has triggered a renewed interest in the possible existence of multiquark states not predicted by the naive quark model. In this talk we present some considerations on $P_c$ photo-production experiments, aimed at testing its multi-quark interpretation in the...

40. Vector meson photoproduction in ultra-peripheral p-Pb and Pb-Pb collisions at the LHC with ALICE

Michal Broz (CTU Prague)

04/06/2019, 15:15

Gamma-Hadron Collisions

Talk

Vector mesons are plenteously produced in ultra-peripheral collisions where the impact parameter is larger than the sum of the radii of the two projectiles, implying that electromagnetic induced processes become dominant.

Light vector meson photoproduction cross sections can be used to study Glauber-Gribov shadowing effects at the hadronic level while the photoproduction of heavy vector...

36. Central exclusive production at LHCb

Charlotte Van Hulse

04/06/2019, 15:45

Gamma-Hadron Collisions

Talk

The LHCb collaboration has measured central exclusive production of J/ψ, ψ(2S), and Υ mesons as well as J/ψJ/ψ and J/ψψ(2S) meson pairs in proton-proton collisions. The analyses of Υ and charmonium pairs are performed at the centre-of-mass energies of 7 TeV and 8 TeV, and those of J/ψ and ψ(2S) are done at 7 TeV and 13 TeV. The analysis at 13 TeV involves the usage of new shower counters....

54. Recent results from VEPP-2000

Vyacheslav Ivanov (Budker Institute of Nuclear Physics)

Gamma-Hadron Collisions

Talk

Since 2010 two detectors, CMD-3 and SND, have been collecting statistics at the electron-positron collider VEPP-2000. The collected integrated luminosity is about 200 pb${}^{-1}$ for each detector in the wide c.m. energy range from 0.32 up to 2 GeV. The current status of analysis as well as recent results are reported. Special attention is paid to the studies of e^+e^- \to \pi^+\pi^-,...