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Austin Alan Baty (University of Illinois Chicago)25/09/2025, 15:45Forward and diffractive physicsTalk
We will present a review of recent ultraperipheral collisions from the ATLAS and CMS results.
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Anisa Khatun (Universita degli studi di Foggia (IT))25/09/2025, 16:10Forward and diffractive physicsTalk
Ultra-peripheral collisions (UPCs) at the LHC offer a clean and controlled environment to study photon-induced interactions in the absence of hadronic interactions from collision with nuclear overlap. The ALICE experiment has established a comprehensive UPC physics program spanning QCD, electroweak, and nuclear structure studies.
The photoproduction of light vector mesons, such as...
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Christophe Royon (The University of Kansas (US))25/09/2025, 16:35Forward and diffractive physicsTalk
We study exclusive $J/\Psi$,$\Upsilon$, and $c \bar{c}$, $b \bar{b}$ photoproduction for proton and Pb targets in the high-energy limit, with the energy dependence computed using the linear Balitsky-Fadin-Kuraev-Lipatov and the nonlinear Balitsky-Kovchegov evolution equations. The difference between these two evolution equations can be directly attributed to gluon saturation physics. We find...
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Michal Praszalowicz (Jagiellonian University, Krakow)25/09/2025, 17:30Forward and diffractive physicsTalk
In this talk we argue that geometric scaling conjectured and observed at
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the ISR more than 50 years ago, still holds at the LHC. We discuss
regularities of the dip-bump structures of the differential elastic cross sections, emphasizing the fact that the ratio of bump to dip positions
is constant from the ISR to the LHC. Applying crossing and analyticity we
identify imaginary and real parts... -
Florian Cougoulic26/09/2025, 09:00Forward and diffractive physicsTalk
This talk will present a review of color glass condensate models, and also the phenomenology how to probe them using existing and incoming data.
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Jamal Jalilian-Marian26/09/2025, 09:25Forward and diffractive physicsTalk
We calculate the Next to Leading Order (NLO) corrections to single inclusive hadron production in DIS (SIDIS) in the forward rapidity region using the Color Glass Condensate (CGC) formalism. We then consider the kinematic region where the transverse momentum of the produced hadron is much less than the virtuality of the photon and show that there are large (Sudakov) logs originating from this...
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Alina Czajka (National Centre for Nuclear Research)26/09/2025, 09:50Forward and diffractive physicsTalk
In this talk, I will discuss the back-to-back limit of the DIS dijet production at next-to-eikonal accuracy computed in a highly boosted gluon background field within the Color Glass Condensate (CGC) framework.
I will show that the various types of next-to-eikonal corrections can be written as field strength insertions on the CGC Wilson lines which provide direct relation with the gluon...
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Georg Wolschin26/09/2025, 10:15Forward and diffractive physicsTalk
In relativistic heavy-ion collisions, stopping in the initial collision stages is accompanied by a local thermalization of gluons towards the Bose-Einstein distribution, and of valence quarks towards the Fermi-Dirac limit. Whereas the thermalization can be accounted for by an analytically solvable nonlinear diffusion model [1], we describe the time-dependent slowing down (``stopping") of the...
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Otto Nachtmann (University of Heidelberg)26/09/2025, 11:10Forward and diffractive physicsTalk
We present a study of the central exclusive production (CEP) of $\eta$ and $\eta'(958)$ mesons in diffractive proton-proton collisions at high energies. The amplitudes, including pomeron and reggeon exchanges, are calculated within the tensor-pomeron model. Absorption effects are also taken into account at the amplitude level. We fit some undetermined model parameters (coupling constants and...
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Rainer Schicker (Heidelberg University (DE))26/09/2025, 11:35Forward and diffractive physicsTalk
I present a feasibility study for measuring central exclusive $\eta,\eta' (958)$ production at the LHC. These pseudo-scalar mesons can be detected by their decays $\eta'(958) \rightarrow \pi^+\pi^-\eta$, and $\eta \rightarrow \pi^+\pi^-\pi^0$. For such measurements, the detection of the forward scattered protons is mandatory. I present the required detector position resolution of these very...
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Jackson Reeves Pybus (Los Alamos National Laboratory (US))26/09/2025, 12:00Forward and diffractive physicsTalk
The LHCb experiment offers unique capabilities for studying ultra-peripheral collisions (UPCs) and other diffractive processes at the LHC. The forward acceptance of the detector, covering pseudorapidity $2<\eta<5$, allows for the detection of low-mass resonances produced in diffraction as well as kinematic reach down to very low $x$. The particle identification and vertexing capabilities of...
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Wolfgang Schaefer26/09/2025, 12:25Forward and diffractive physicsTalk
We give an overview of the possibilties of studying photon-proton and photon-nucleus processes at the LHC that arise from exploiting the Weizsaecker-Williams flux of quasireal photons. In particular we will discuss diffractive photoproduction on nuclei, inclusive photoproduction of open charm, and prospects of measuring the total photoabsorption cross section at very high energies.
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