SURGE Collaboration Meeting and Workshop

Jun 28, 2023, 9:00 AM → Jun 30, 2023, 2:45 PM US/Eastern

Physics Department (Bldg. 510), Large Seminar Room (Hosted by Brookhaven National Laboratory)

The first meeting of the Saturated Glue (SURGE) Topical Collaboration.

Collaboration mission: Discover and explore the gluon saturation regime of quantum chromodynamics by advancing calculations to high precision and developing a comprehensive framework to compute observables and compare to a wide range of experimental data, including predictions for the Electron Ion Collider (EIC).

Collaboration Goals

• Identify observables that are sensitive to gluon saturation in polarized and unpolarized proton-nucleus collisions (p + A), ultraperipheral heavy ion and p + A collisions, in DIS off polarized protons or light nuclei (e + p), and in DIS off heavy nuclei (e + A).
• Provide robust end-to-end calculations minimizing known uncertainties for each of these observables with an ambitious goal of < 10% accuracy, sufficient for unambiguous characterization of the gluon dominated small x regime in protons and nuclei.
• Incorporate results in a novel global analysis framework for data-theory comparisons that can be systematically improved to cleanly establish evidence for a universal gluon saturation regime in QCD.
• Explore the larger implications of the ideas and techniques developed during the project and their interdisciplinary connections.

A realistic goal in small x studies is 10% accuracy. This is driven by the fact that process-dependent so-called “impact factors” for key final states are progressing towards next-to-leading order (NLO) accuracy; likewise, there is progress in computing small-x evolution equations to next-to-leading logarithmic accuracy. We will also discuss reducing uncertainties in initial conditions, spin dynamics and parton fragmentation to this required level.

Topics or Session Information

• Initial state
• Small x evolution and next-to-leading order calculations
• Spin
• Final state
• Framework and global analysis

 

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Event ID: E000004955

Note: This event falls under Exemption B (Meetings to consider internal agency business matters held in Federal facilities. This exemption would include activities such as meetings that take place as part of an organization's regular course of business, do not exhibit indicia of a formal conference, and take place in a Federal facility).

Wednesday, June 28

9:00 AM → 10:15 AM Introduction and WG presentations

Convener: Dr Bjoern Schenke (BNL)

9:00 AM Welcome / Introduction to SURGE

Speakers: Anna Stasto (Penn State University), Dr Bjoern Schenke (BNL)

9:25 AM Overview of Initial State WG

Speaker: Vladimir Skokov (North Caroline State University / RBRC)

9:50 AM Overview of Small x+NLO WG

Speaker: Zhongbo Kang (UCLA)

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:00 PM Introduction and WG presentations

Convener: Dr Bjoern Schenke (BNL)

10:45 AM Overview of Spin WG

Speaker: Matthew Sievert (New Mexico State University)

11:10 AM Overview of Final State WG

Speaker: Xin-Nian Wang (Lawrence Berkeley National Laboratory)

11:35 AM Overview of Global Analysis WG

Speaker: Fredrick Olness (SMU)

12:00 PM → 1:30 PM Lunch

1:30 PM → 2:45 PM Talks

Convener: Dr Bjoern Schenke (BNL)

1:30 PM Saturation at RHIC

Speaker: Xiaoxuan Chu (BNL)

1:55 PM Di-hadron correlation in forward pA collisions at RHIC: how to correctly interpret the results?

Speaker: Feng Yuan (Lawrence Berkeley National Laboratory)

2:20 PM Calculation of sub-eikonal corrections at small-x and Quasi PDFs

Speaker: Andrey Tarasov (North Carolina State University)

2:45 PM → 3:15 PM Coffee break

3:15 PM → 4:55 PM Talks

Convener: Dr Bjoern Schenke (BNL)

3:15 PM Physics of the ALICE Forward Calorimeter Upgrade

Speaker: Peter Jacobs (Lawrence Berkeley National Laboratory)

3:40 PM Color Neutralization and Initial Conditions

Speaker: Haowu Duan (North Carolina State University)

4:05 PM Rapidity-only TMD factorization

Speaker: Ian Balitsky (JLab/ODU)

4:30 PM Precision calculations for the EIC: Next to Leading Order corrections to single, double and total cross sections in DIS at small x

Speaker: Jamal Jalilian-Marian (Baruch College, City University of New York)

4:55 PM → 5:40 PM Business Meeting

Thursday, June 29

9:00 AM → 10:15 AM Talks

Convener: Dr Bjoern Schenke (BNL)

9:00 AM Saturation in UPC

Speaker: Zhoudunming Tu (BNL)

9:25 AM Initial conditions for small-x evolution of the dipole scattering amplitude on a proton

Speaker: Adrian Dumitru (Dept. of Natural Sciences, Baruch College (CUNY))

9:50 AM Asymptotic detector operators in weakly-coupled field theories

Speaker: Simon Caron-Huot (McGill University)

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:00 PM Talks

Convener: Dr Bjoern Schenke (BNL)

10:45 AM Rethinking running coupling in JIMWLK

Speaker: Vladimir Skokov (North Caroline State University / RBRC)

11:10 AM Resummation of the impact factors

Speaker: Anna Stasto (Penn State University)

11:35 AM Elucidating the correspondence between CGC, TMD, and Generalized High-Twist formalisms of QCD matter

Speaker: Farid Salazar (UCLA/UCB/LBNL)

12:00 PM → 1:30 PM Lunch

1:30 PM → 2:20 PM Talks

Convener: Dr Bjoern Schenke (BNL)

1:30 PM Global analysis of polarized DIS + SIDIS at small x

Speaker: Daniel Adamiak

1:55 PM Disambiguation of bimodal solutions for g_1(x)

Speaker: Nicholas Baldonado

2:20 PM → 3:20 PM Breakout Session: WG 1

2:20 PM → 3:20 PM Breakout Session: WG 2

2:20 PM → 3:20 PM Breakout Session: WG 3

2:20 PM → 3:20 PM Breakout Session: WG 4

2:20 PM → 3:20 PM Breakout Session: WG 5

3:20 PM → 4:00 PM Coffee break

4:00 PM → 5:15 PM Talks

Convener: Dr Bjoern Schenke (BNL)

4:00 PM Status report on particle production in polarized p+p

Speaker: Ming Li (North Carolina State University)

4:25 PM Updates on OAM at small x

Speaker: Brandon Manley (Ohio State University)

4:50 PM Analytic solution of the large-Nc helicity evolution

Speaker: Jeremy Borden (Ohio State University)

7:00 PM → 8:00 PM Dinner: Workshop Dinner

Friday, June 30

9:00 AM → 10:15 AM Talks

Convener: Dr Bjoern Schenke (BNL)

9:00 AM Probing Non-Linear QCD effects at EIC

Speaker: E. C. Aschenauer (BNL)

9:25 AM EPIC Monte Carlo

Speaker: Kemal Tezgin (Brookhaven National Lab)

9:50 AM SMASH

Speaker: Jordi Salinas

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:00 PM Talks

Convener: Dr Bjoern Schenke (BNL)

10:45 AM Exploring quantum corrections to the initial condition for high energy evolution

Speaker: Yacine Mehtar-Tani (Brookhaven National Laboratory)

11:10 AM eHIJING update

Speakers: Weiyao Ke (Los Alamos National Laboratory), Weiyao Ke (Duke University), Weiyao Ke (Los Alamos National Laboratory)

11:35 AM Extractions of TMD distributions

Speaker: Valerio Bertone (member@cern.ch)

12:00 PM → 1:30 PM Lunch

1:30 PM → 2:45 PM Talks

Convener: Dr Bjoern Schenke (BNL)

1:30 PM Chiral and trace anomalies in DVCS

Speaker: Yoshitaka Hatta (BNL)

1:55 PM Gluon saturation search at Bjorken-x < 10^-4 at LHC

Speaker: Cesar da Silva (Los Alamos National Lab)

2:20 PM Searching for saturation signals in UPCs

Speaker: Huachen Sun (The Ohio State University)