NPP - FY 2021 LDRD PresentationProposal Title of LDRD 18-045: Jets at the EIC

Principal Investigator: Raju Venugopalan

Department/Division: Physics

Other Investigators: Megan Connors, Abhay Deshpande, Yacine Mehtar-Tani, George Sterman, Thomas Ullrich

Post-docs: Kolya Kauder (continues at BNL in NPPS group)Alba Soto-Ontoso (Post-doc at Saclay/CERN this fall)

Proposal Term: From 02/01/2018 to 09/30/2020

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Project description: Jets at the EIC

Study jet production and propagation in the clean environment of electron-nucleus (e+A) and (e+p) collisions at the EIC

Perform high precision calculation for newly identified jet observables at an EIC

Perform feasibility studies for EIC measurements of such physics processes, identify key observables and develop the necessary analysis techniques.

Project status

Ø First complete theoretical calculation of parton splittingin cold and hot QCD media. NNLO accuracy achieved in thenewly proposed “improved opacity expansion” scheme.

Ø Novel substructure observable proposed “jet hardness” with an associated grooming technique (dynamical grooming) that outperforms state-of-the-art substructure techniques.

Ø A new background estimation method for pp and AA jet studies: Novel approach exploiting the correlations between the hard and the soft components of a jet to improve the resolution of the jet transverse momentum: 5 to 40 % improvement w.r.t. existing method, extension to e+A with JETSCAPE

Ø First NLO+NLLx computation of dijet+photon production in DIS at small x

LO (BDMPS-Z)

GLV

NLO

NNLO (matched)

LO+NLO

LO+NLO+NNLO (matched)

0.01 0.10 1 10 100 1000

10-5

0.001

0.100

10

ω

ωc

ωd

I

dω

Project status: publications1) “Tagging boosted hadronic objects with dynamical grooming”, Y. Mehtar-Tani, A. Soto-Ontoso, K. Tywoniuk, 2005.07584

2) “Improved opacity expansion at NNLO for medium induced gluon radiation”, Y. Mehtar-Tani, J. Barata, 2004.02323 [hep-ph]

3) “Dynamical grooming of QCD jets” Y. Mehtar-Tani, A. Soto-Ontoso, K. Tywoniuk, PRD 101 (2020) 3, 034004

4) “Improved opacity expansion for medium-induced parton splitting”, Y. Mehtar-Tani, , K. Tywoniuk, 1910.02032 [hep-ph]

5) “Gluon bremsstrahlung in finite media beyond multiple soft scattering approximation”, Y. Mehtar-Tani, JHEP 07 (2019) 057

6) “Background estimator for jet studies in pA and AA collisions, Y. Mehtar-Tani, A. Soto-Ontoso, M. Verweij,PRD 100 (2019) 11, 114023 7) “The JETSCAPE framework”, J. Putschke, Kolja Kauder, JETSCAPE Collaboration submitted to Comp. Phys. Comm., arXiv:1903.07706

8) “Measurement of Groomed Jet Substructure Observables in pp Collisions at √s=200 GeV with STAR”, STAR (Co-PA KoljaKauder), arXiv:2003.02114 [hep-ex], submitted to PLB

9) “Underlying event measurements in p+p collisions at sqrt(s)=200 GeV at RHIC”, STAR (Kolja Kauder GPC), PRD 101 (2020) 52004

10) “The JETSCAPE framework: p+p results”, JETSCAPE Collaboration (Kolja Kauder), arXiv:1903.07706 [nucl-th]

11) “Extracting many-body correlators of saturated gluons with precision from inclusive photon+dijet final states in DIS”,K. Roy and R. Venugopalan, Phys.Rev.D 101 (2020) 7, 071505

12) “NLO impact factor for inclusive photon+dijet production in e+A DIS at small x”, K. Roy and R. Venugopalan, Phys.Rev.D 101 (2020) 3, 034028

Project status: TalksYacine Mehtar-Tani:

Seminars and Colloquia (4): "QCD jet substructure with Dynamical grooming", LBNL Berkeley, Dec. 12, 2019. “Novel aspects of QCD at high energy: jet evolution and wave turbulence in dense media”, WSU, Detroit, Jan 17. “Higher order corrections to jet quenching”, WSU, Detroit, Jan 18. 2019 . “Sudakov suppression of jets in dense QCD matter”, JLab, Nov 26, 2018.

Plenary talk (1): "Improved opacity expansion for in-medium parton splitting". at Light Cone 2019, Ecole Polytechnique, Palaiseau, France, Oct. 16 - 22, 2019

Invited reviews and lectures (2): “Jets and substructure in HIC”, JetTools Bergen, May 13-17, 2019. “Introduction to QCD”, Phenix Mini School, May 10, 2019.

Invited talks (8): “Jet quenching theory…a brief introduction”, Open Symposium: The space- time structure of jet quenching: theory and experiment, GSI Darmstadt, August 12, 2019. "Jet evolution and wave turbulence in QCD media". Symposium on Contemporary QCD Physics and Relativistic Nuclear Collisions, CCNU, Wuhan, China, Nov. 9-11, 2019. "Energy Loss in Hot QCD matter”, 2019 Fall Meeting of the APS Division of Nuclear Physics, Arlington, VA October 14-17, 2019. “Probing QCD: from heavy ion collisions to the EIC”, Workshop on Forward Physics and QCD at the LHC, Guanajuato, Mexico, Nov. 18-21. 2019. “Recent theoretical developments on jets in heavy-ion collisions”. 7th Edition of the Large Hadron Collider Physics Conference, Puebla, Mexico, May 20-25, 2019 . “The LPM effect in QCD revisited”, 8th Workshop of the APS Topical Group on Hadronic Physics, Denver, Apr 10-12, Jet Workshop, UCLA, Jan 28-30. “Generating functional for jet observables in HIC”, JETSCAPE Workshop, Texas, Jan 9-13. “Jet energy loss and its perspective at EIC”, EIC User Group Meeting 2018, Washington DC, Jul 30 - Aug 2.

Project status: TalksAlba Soto-Ontoso:

Feb 2020 Jets and Heavy Flavor Workshop Santa Fe. Contributed talk: Jet substructure observables with dynamicalgrooming.Dec 2019 IV CAFPE-Fisica Teórica Christmas Workshop Universidad de Granada. Invited talk: Jet substructure viadynamical grooming.Sep 2019 Heavy Ion Coffee CERN. Seminar: A new look into background subtraction for jet physics in p+p and A+AcollisionsJuly 2019 BOOST MIT. Lightning talk: A background estimator for jet studies in p+p and A+A collisions.June 2019 RHIC/AGS Users meeting BNL. Invited talk: Jets and background subtraction.May 2019 Nuclear Physics Colloquium Goethe University. Seminar: Mitigating pileup and underlying event for jet studiesin p+p and A+A at LHC energies.June 2019 JetTools Bergen University. Invited talk: Background subtraction techniques and jet substructure.March 2019 Nuclear Theory Seminar Stony Brook University. Seminar: Background estimation for jets in high energyproton-proton and heavy ion collisions.Feb 2019 Particle Physics Seminar City College NY. Seminar: Background estimation for jets in high energy proton-protonand heavy ion collisions.Jan 2019 RIKEN Lunch Seminar BNL. Seminar: A novel background estimation method for jet studies in heavy ioncollisions.Dec 2018 III CAFPE-Fisica Teórica Christmas Workshop Universidad de Granada. Invited talk: A novel backgroundestimation method for jet studies in heavy -ion collisions.

Project status: Talks

Kolja Kauder:June 2020 (upcoming) Invited, plenary: Monte Carlo modeling of hard processes, Hard Probes 2020 (online)Apr 2020 Tutorial: Fast Simulation Tutorial (online)Jan, 2020 Colloquium: Past, Present, and Future of Reconstructed Jets in High Energy Physics, Colloquium at Georgia State University, Atlanta, GADecember 2019 Review: Jets and JETSCAPE for an EIC, CFNS Review, Stony Brook, NYNovember 2019 Workshop: JETSCAPE for EIC MCEGs for future ep and eA facilities, Vienna, AustriaSeptember 2019 Contributed: Using JETSCAPE to Simulate Jets at an EIC, POETIC, LBNLOctober 2019 Contributed: Using JETSCAPE to Simulate Jets at an EIC, DNP, Crystal City, VAJuly 2019 Contributed: Exploring Jet Observables at an EIC with the JETSCAPE framework, EICUG Users' Meeting, Paris, FranceJuly 2019 Contributed: Eic-Smear and its parameterizations, EICUG Users' Meeting, Paris, FranceJuly 2019 Invited, Workshop: Eic-Smear and its parameterizations, EIC Software Meeting on Detector and Physics Simulations, BNLMay 2019 Invited, Workshop: Eic-Smear and its parameterizations, EIC Software Meeting, Trieste, ItalyApril 2019 Contributed: Using JETSCAPE to Simulate Jets at an EIC, DIS, Turin, ItalyFebruary 2019 Workshop: Jets in eA Collisions, MCEGs for future ep and eA facilities, Hamburg, GermanyNovember 2018: Jet Observables and Techniques, Center for Frontiers in Nuclear Science Inaugural Symposium,Stony BrookJune 2018 Invited: Jet Substructure Measurements in STAR, RBRC Workshop on The Definition of Jets in a Large Background,, BNLJune 2018 Invited: Jet Substructure Measurements in STAR, RHIC & AGS Annual Users’ Meeting, BNL

NPP FY 2020 LDRD Status – Funding, Cost, Effort

• Fiscal Year FY 2020 FY 2021 FY 2022• Total Funds. $344,450.00 $0 $0

YTD expenses $171,099.00Commitments $173, 351.00

• Effort ( FTE’s) 1.74

• Issues: None

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