Conveners
Small-x
- Samuel Wallon
Small-x
- Edmond Iancu (CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
Small-x
- Raju Venugopalan (Brookhaven National Laboratory)
Description
Small-x session
Nestor Armesto Perez
(Universidade de Santiago de Compostela (ES))
07/09/2015, 14:10
Small-x and saturation
Oral Presentation
The Large Hadron-Electron Collider LHeC is a proposed upgrade of the LHC to study ep/eA collisions in the TeV regime, by adding a 60 GeV electron beam through an Energy Recovery Linac. In this talk we will review the possibilities for studying the small-x region in this machine, with emphasis in the potential for unravelling the existence of a novel, non-linear saturation regime of QCD through...
Heribert Weigert
(University of Oulu)
07/09/2015, 14:35
Small-x and saturation
Oral Presentation
91.
Resumming large radiative corrections in the high-energy evolution of the Color Glass Condensate
Edmond Iancu
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
07/09/2015, 15:00
Small-x and saturation
Oral Presentation
The BK-JIMWLK equations describing the evolution of the Color Glass Condensate with increasing energy have recently been extended to next-to-leading order (NLO) accuracy. However, some of the NLO corrections turn out to be extremely large, since amplified by (double and single) `collinear’ logarithms, i.e. logarithms of ratios of transverse momenta. This difficulty points towards the existence...
Javier L Albacete
(Universidad de Granada)
07/09/2015, 15:25
Small-x and saturation
Oral Presentation
In this talk I shall discuss the ability of the collinearly improved BK equations recently proposed in the literature by G. Beuf (1401.0313) and Iancu et al. (arXiv:1502.05642) to describe data on the reduced cross section in e+p collisions at small values of Bjorxen-x measured at HERA by the H1 and ZEUS collaborations. I shall present a comparative study of the result of global fits to these...
Alex Kovner
(University of Connecticut)
07/09/2015, 15:50
Small-x and saturation
Oral Presentation
We discuss the recent improvement of the NLO calculation of single inclusive particle production in pA collisions within the CGC formalizm. The two points that have not been addressed previously, and are treated consistently in the current approach are the Ioffe time cutoff on the configurations that can participate in the scattering, and the careful treatment of the evolution interval.
Daniel Boer
(University of Groningen)
08/09/2015, 13:45
Small-x and saturation
Oral Presentation
Transverse momentum dependent parton distributions (TMDs) are currently under active investigation, both theoretically and experimentally. For studies of the gluon TMDs higher energy or smaller x values are required. EIC can offer ideal probes for studies of the
distributions of unpolarized and linearly polarized gluons inside unpolarized protons, and of the gluon Sivers effect for...
Prof.
Yuri Kovchegov
08/09/2015, 14:10
Small-x and saturation
Oral Presentation
We set up a formalism for calculating transverse-momentum-dependent parton distribution functions (TMDs) using the tools of saturation physics: quasi-classical approximation and quantum evolution. In the quasi-classical approximation we show how to calculate the quark TMDs of a nucleus at large-x: the unpolarized quark distribution, the Sivers function, and the quark Boer-Mulders distribution....
Ian Balitsky
(ODU/JLab)
08/09/2015, 14:35
Small-x and saturation
Oral Presentation
I discuss how the rapidity evolution of gluon transverse momentum dependent distribution
changes from nonlinear evolution at small x<<1 to linear evolution at moderate x~1.
Dr
jian zhou
(Nikhef)
08/09/2015, 15:00
Small-x and saturation
Polarized gluon TMDs are not necessarily suppressed at small x. One of the notable example is the linearly polarized gluon distribution which actually saturates the positivity bound in the dilute region. In this talk, I will discuss three leading power T-odd gluon TMDs inside a transversely polarized target. It is shown that all of three gluon TMDs receive leading logarithm ln(1/x)...
Dr
Samuel Wallon
08/09/2015, 15:25
Small-x and saturation
Oral Presentation
We study the production of two forward jets with a large interval of rapidity at hadron colliders, which was proposed by Mueller and Navelet as a possible test of the high energy dynamics of QCD, within a complete next-to-leading logarithm framework. We show that using the Brodsky-Lepage-Mackenzie procedure to fix the renormalization scale leads to a very good description of the recent CMS...
Jamal Jalilian-Marian
(Baruch College)
10/09/2015, 09:00
Small-x and saturation
Oral Presentation
We compute the Next to Leading Order corrections to di-jet (di-hadron) production in DIS at small x using the Color Glass Condensate formalism. We study the azimuthal angular correlations between the two produced partons.
(work in progress)
Daniele De Gruttola
(Universita e INFN, Salerno (IT))
10/09/2015, 09:25
Small-x and saturation
Oral Presentation
Ultra-Peripheral Collisions (UPC) occur when the colliding particles are separated by impact parameters larger than the sum of their radii, and the interaction is mediated by the electromagnetic field.
The ALICE Collaboration has studied exclusive photoproduction of $\rho^{0}$, J/$\psi$ and $\psi$(2S) vector mesons in Pb-Pb collisions at the LHC. Exclusive production of J/$\psi$ vector meson...
Ronan Mcnulty
(University College Dublin (IE))
10/09/2015, 09:50
Small-x and saturation
Oral Presentation
Proton-proton collisions at LHC energies usually produce hundreds of charged and neutral particles. However, when colourless propagators are involved and, in addition, the protons remain intact, this leads to a unique experimental signature of a small number of particles in the central region and two rapidity gaps that extend to the outgoing protons in the far-forward direction. Although...
Marco Van Leeuwen
(Nikhef National institute for subatomic physics (NL))
10/09/2015, 10:15
Small-x and saturation
Oral Presentation
Direct photon production at forward rapidity is a promising probe for the gluon content of protons and nuclei at small x. In particular, the measurement of the nuclear modification factor for direct photons in p–A collisions at the LHC should provide a crucial test for gluon saturation. We discuss the unique role of such a photon measurement in the context of other measurements at the LHC and...
