SURGE Collaboration Meeting and Workshop

Jun 28, 2023, 8:55 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).

Wed, June 28

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

Convener: Anna Stasto (Penn State University)

9:00 AM Welcome

Speaker: Hong Ma (BNL)

9:05 AM Opening / Introduction to SURGE

Speaker: Dr Bjoern Schenke (BNL)

SURGE Meeting-3.pdf

9:25 AM Overview of Initial State WG

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

Surge_Initial.pdf

9:50 AM Overview of Small x+NLO WG

Speaker: Zhongbo Kang (UCLA)

Kang-smallx.pdf

10:15 AM → 10:45 AM Coffee break

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

Convener: Anna Stasto (Penn State University)

10:45 AM Overview of Spin WG

Speaker: Matthew Sievert (New Mexico State University)

Sievert_SURGE_2023.pdf

11:10 AM Overview of Final State WG (remote)

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

xnwang.pdf

11:35 AM Overview of Global Analysis WG

Speaker: Fredrick Olness (SMU)

Olness_Surge_June2023.pdf

xFitter Resource Doc xFitter_2206.12465.pdf

12:00 PM → 1:30 PM Lunch

1:30 PM → 3:00 PM Talks

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

1:30 PM Saturation at RHIC

Speaker: Xiaoxuan Chu (BNL)

SURGE_xchu.pdf

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)

SURGE_2023_Yuan.pdf

2:20 PM Anomaly zero modes and sub-eikonal corrections at small-x

Speaker: Andrey Tarasov (North Carolina State University)

SURGE 2023. Tarasov.pdf

2:40 PM Color Neutralization and Initial Conditions (remote)

Speaker: Haowu Duan (North Carolina State University)

Duan_SURGE_meeting.pdf

3:00 PM → 3:30 PM Coffee break

3:30 PM → 4:55 PM Talks

Convener: Zhongbo Kang (UCLA)

3:30 PM Physics of the ALICE Forward Calorimeter Upgrade (remote)

Speaker: Peter Jacobs (Lawrence Berkeley National Laboratory)

Jacobs_FoCal_SURGECollabMtg.pdf

3:55 PM Precision calculations for the EIC: Next to Leading Order corrections to single, double and total cross sections in DIS at small x (remote)

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

Jalilian-Marian_SURGE-2023-online.pdf

4:15 PM Rapidity-only TMD factorization

Speaker: Ian Balitsky (JLab/ODU)

Balitsky_20mintalk.pdf

4:35 PM NLO corrections to back-to-back dijet electroproduction at small x

Speaker: Tomasz Stebel (Jagiellonian University)

Stebel_Surge 2023 stebel.pdf

Stebel_Surge 2023 stebel.pptx

4:55 PM → 5:40 PM Business Meeting

SURGE Business Meeting.pdf

Thu, June 29

9:00 AM → 10:10 AM Talks

Convener: Raju Venugopalan (BNL)

9:00 AM Saturation in UPC

Speaker: Zhoudunming Tu (BNL)

SURGE-Tu-upload.pdf

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))

Initial_Conditions.pdf

9:45 AM Asymptotic detector operators in weakly-coupled field theories

Speaker: Simon Caron-Huot (McGill University)

caron-huot_brookhaven2023.pdf

10:10 AM → 10:40 AM Coffee break

10:40 AM → 12:00 PM Talks

Convener: Dr Bjoern Schenke (BNL)

10:40 AM Rethinking running coupling in JIMWLK

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

SkokovSurge.pdf

11:00 AM Resummation of the impact factors

Speaker: Anna Stasto (Penn State University)

Anna_Stasto_impact_factors.pdf

11:20 AM Exploring quantum corrections to the initial condition for high energy evolution

Speaker: Yacine Mehtar-Tani (Brookhaven National Laboratory)

Surge-meeting-06:2023.pdf

11:40 AM Global analysis of polarized DIS + SIDIS at small x

Speaker: Daniel Adamiak

Adamiak_SURGE meeting Small-x Helicity Phenomenology.pdf

12:00 PM → 1:30 PM Lunch

1:30 PM → 2:30 PM Talks

Convener: Yoshitaka Hatta (BNL)

1:30 PM Status report on particle production in polarized p+p (remote)

Speaker: Ming Li (North Carolina State University)

Li_double_spin_asymmetry_small_x_by_MingLi_SURGE.pdf

1:50 PM Disambiguation of bimodal solutions for g_1(x)

Speaker: Nicholas Baldonado

Baldonado_SURGE_23.pdf

Baldonado_SURGE_23.pptx

2:10 PM Updates on OAM at small x (remote)

Speaker: Brandon Manley (Ohio State University)

2:30 PM → 3:30 PM Breakout Session: Final State WG

2:30 PM → 3:30 PM Breakout Session: Global analysis WG

2:30 PM → 3:30 PM Breakout Session: Initial State WG

2:30 PM → 3:30 PM Breakout Session: Small x and NLO WG

2:30 PM → 3:30 PM Breakout Session: Spin WG

3:30 PM → 4:00 PM Coffee break

4:00 PM → 5:00 PM Discussion

Convener: Raju Venugopalan (BNL)

7:00 PM → 9:00 PM Dinner: Workshop Dinner

Fri, June 30

9:00 AM → 10:10 AM Talks

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

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

Speaker: E. C. Aschenauer (BNL)

eca.EIC.SURGE.pptx

9:25 AM EPIC Monte Carlo

Speaker: Kemal Tezgin (Brookhaven National Lab)

SURGEmeeting.pdf

9:50 AM SMASH

Speaker: Jordi Salinas

Salinas_2023-06-30_PDG21Plus_SURGE-Collaboration-Meeting.pdf

10:10 AM → 10:40 AM Coffee break

10:40 AM → 12:00 PM Talks

Convener: Fredrick Olness (SMU)

10:40 AM Elucidating the correspondence between CGC and Generalized High-Twist formalisms of QCD matter

Speaker: Farid Salazar (UCLA/UCB/LBNL)

CGC_GHT_Surge.pdf

11:00 AM eHIJING update (remote)

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

Ke_SURGE.pdf

11:20 AM Extractions of TMD distributions

Speaker: Valerio Bertone (member@cern.ch)

bertone_SURGE_workshop_30_06_2023.pdf

11:40 AM Searching for saturation signals in UPCs

Speaker: Huachen Sun (The Ohio State University)

Searching for saturation signals in UPCs.pdf

Searching for saturation signals in UPCs.pptx

12:00 PM → 1:30 PM Lunch

1:30 PM → 2:35 PM Talks

Convener: Matthew Sievert (New Mexico State University)

1:30 PM Gluon saturation search at Bjorken-x < 10^-4 at LHC (remote)

Speaker: Cesar da Silva (Los Alamos National Lab)

small-x_SURGE-BNL-2023.pdf

1:55 PM Chiral and trace anomalies in DVCS

Speaker: Yoshitaka Hatta (BNL)

Hatta.pdf

2:15 PM Analytic solution of the large-Nc helicity evolution

Speaker: Jeremy Borden (Ohio State University)

SURGE_2023_borden.pdf

2:35 PM → 2:45 PM Closing

Convener: Dr Bjoern Schenke (BNL)

2:35 PM Closing

Schenke_06-30-2023.pdf