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. 2025 Sep 12;135(11):111901.
doi: 10.1103/wv2t-dkgn.

Measurement of Two-Point Energy Correlators within Jets in p+p Collisions at sqrt[s]=200 GeV

B E Aboona  1 J Adam  2 G Agakishiev  3 I Aggarwal  4 M M Aggarwal  4 Z Ahammed  5 A Aitbayev  3 I Alekseev  6   7 E Alpatov  7 A K Alshammri  8 A Aparin  3 S Aslam  9 J Atchison  10 G S Averichev  3 V Bairathi  11 X Bao  12 K Barish  13 S Behera  14 P Bhagat  15 A Bhasin  15 S Bhatta  16 J Bielcik  2 J Bielcikova  2   17 I G Bordyuzhin  6 J D Brandenburg  18 A V Brandin  7 C Broodo  19 X Z Cai  20 H Caines  21 M Calderón de la Barca Sánchez  22 D Cebra  22 J Ceska  2 I Chakaberia  23 Y S Chang  24 Z Chang  25 A Chatterjee  26 D Chen  13 J H Chen  9 Q Chen  27 Z Chen  12 J Cheng  28 Y Cheng  29 W Christie  30 X Chu  30 S Corey  18 H J Crawford  31 G Dale-Gau  32 A Das  2 T G Dedovich  3 I M Deppner  33 A A Derevschikov  34 A Deshpande  16 A Dhamija  4 A Dimri  16 P Dixit  35 X Dong  23 J L Drachenberg  10 E Duckworth  8 J C Dunlop  30 J Engelage  31 G Eppley  36 S Esumi  37 O Evdokimov  32 O Eyser  30 R Fatemi  38 S Fazio  39 Y Feng  24 E Finch  40 Y Fisyak  30 F A Flor  21 C Fu  41 T Fu  12 T Gao  12 F Geurts  36 A Gibson  42 K Gopal  14 X Gou  12 D Grosnick  42 A Gu  43 A Gupta  15 A Hamed  44 R J Hamilton  21 X Han  18 M D Harasty  22 J W Harris  21 H Harrison-Smith  38 L B Havener  21 X H He  41 Y He  12 C Hu  45 Q Hu  41 Y Hu  23 H Huang  46   47 H Z Huang  29 S L Huang  16 T Huang  32 Y Huang  48 Y Huang  49 M Isshiki  37 W W Jacobs  25 A Jalotra  15 C Jena  14 Y Ji  23 J JJia  30   16 C Jin  36 N Jindal  18 X Ju  50 E G Judd  31 S Kabana  11 D Kalinkin  38 K Kang  28 D Kapukchyan  13 K Kauder  30 D Keane  8 A Kechechyan  3 M Kesler  8 A Khanal  51 J Kim  30 A Kiselev  30 A G Knospe  52 L Kochenda  7 A A Korobitsin  3 B Korodi  18 A Yu Kraeva  7 P Kravtsov  7 L Kumar  4 M C Labonte  22 R Lacey  16 J M Landgraf  30 C Larson  38 A Lebedev  30 R Lednicky  3 J H Lee  30 Y H Leung  33 D Li  50 H-S Li  24 H Li  53 H Li  27 W Li  36 X Li  50 X Li  50 Y Li  28 Z Li  54 Z Li  50 X Liang  13 T Lin  12 Y Lin  27 C Liu  41 G Liu  54 H Liu  43 L Liu  49 Z Liu  49 T Ljubicic  36 O Lomicky  2 R S Longacre  30 E M Loyd  13 T Lu  41 J Luo  50 X F Luo  49 V B Luong  3 Ma  9 R Ma  30 Y G Ma  9 N Magdy  55 R Manikandhan  19 S Margetis  8 O Matonoha  2 O Mezhanska  2 K Mi  45 N G Minaev  34 B Mohanty  56 B Mondal  56 M M Mondal  56 I Mooney  21 D A Morozov  34 M I Nagy  48 C J Naim  16 A S Nain  4 J D Nam  57 M Nasim  35 H Nasrulloh  50 E Nedorezov  3 J M Nelson  31 M Nie  12 G Nigmatkulov  32 T Niida  37 L V Nogach  34 T Nonaka  37 G Odyniec  23 A Ogawa  30 S Oh  58 V A Okorokov  7 K Okubo  37 B S Page  30 S Pal  2 A Pandav  23 A Panday  35 A K Pandey  41 Y Panebratsev  3 T Pani  59 P Parfenov  7 A Paul  13 S Paul  16 C Perkins  31 B R Pokhrel  57 I D Ponce Pinto  21 M Posik  57 E Pottebaum  21 A Povarov  7 S Prodhan  14 T L Protzman  52 N K Pruthi  4 J Putschke  51 Z Qin  28 H Qiu  41 C Racz  13 S K Radhakrishnan  8 A Rana  4 R L Ray  60 C W Robertson  24 O V Rogachevsky  3 M A Rosales Aguilar  38 D Roy  59 L Ruan  30 A K Sahoo  35 N R Sahoo  14 H Sako  37 S Salur  59 S S Sambyal  15 E Samigullin  6 J K Sandhu  52 S Sato  37 B C Schaefer  52 N Schmitz  61 J Seger  62 R Seto  13 P Seyboth  61 N Shah  63 E Shahaliev  3 P V Shanmuganathan  30 T Shao  9 M Sharma  15 N Sharma  35 R Sharma  14 S R Sharma  14 A I Sheikh  8 D Shen  12 D Y Shen  41 K Shen  50 S Shi  49 Y Shi  12 F Si  50 J Singh  11 S Singha  41 P Sinha  14 M J Skoby  64   24 Y Söhngen  33 Y Song  21 T D S Stanislaus  42 M Strikhanov  7 Y Su  50 X Sun  41 Y Sun  50 B Surrow  57 D N Svirida  6 Z W Sweger  22 A C Tamis  21 A H Tang  30 Z Tang  50 A Taranenko  7 T Tarnowsky  65 J H Thomas  23 D Tlusty  62 M V Tokarev  3 D Torres Valladares  36 S Trentalange  29 P Tribedy  30 B Trzeciak  2 O D Tsai  30   29 C Y Tsang  30   8 Z Tu  30 J E Tyler  1 T Ullrich  30 D G Underwood  66   42 G Van Buren  30 A N Vasiliev  7   34 F Videbæk  30 S Vokal  3 S A Voloshin  51 G Wang  29 J S Wang  43 J Wang  12 K Wang  50 X Wang  12 Y Wang  50 Y Wang  49 Y Wang  28 Z Wang  12 J C Webb  30 P C Weidenkaff  33 G D Westfall  65 H Wieman  23 G Wilks  32 S W Wissink  25 C P Wong  30 J Wu  45 X Wu  29 X Wu  50 B Xi  9 Z G Xiao  28 G Xie  45 W Xie  24 H Xu  43 N Xu  49 Q H Xu  12 Y Xu  12 Y Xu  49 Z Xu  8 Z Xu  66 G Yan  12 Z Yan  16 C Yang  12 Q Yang  12 S Yang  54 Y Yang  46   47 Z Ye  23 L Yi  12 Y Yu  12 W Zha  50 C Zhang  9 D Zhang  54 J Zhang  12 S Zhang  67 W Zhang  54 X Zhang  41 Y Zhang  41 Y Zhang  50 Y Zhang  12 Y Zhang  27 Z Zhang  30 Z Zhang  32 F Zhao  68 J Zhao  9 S Zhou  49 Y Zhou  49 X Zhu  28 M Zurek  66   30 M Zyzak  69 STAR Collaboration
Affiliations

Measurement of Two-Point Energy Correlators within Jets in p+p Collisions at sqrt[s]=200 GeV

B E Aboona et al. Phys Rev Lett. .

Abstract

Hard-scattered partons ejected from high-energy proton-proton collisions undergo parton shower and hadronization, resulting in collimated collections of particles that are clustered into jets. A substructure observable that highlights the transition between the perturbative and nonperturbative regimes of jet evolution in terms of the angle between two particles is the two-point energy correlator (EEC). In this Letter, the first measurement of the EEC at RHIC is presented, using data taken from 200 GeV p+p collisions by the STAR experiment. The EEC is measured both for all the pairs of particles in jets and separately for pairs with like and opposite electric charges. These measurements demonstrate that the transition between perturbative and nonperturbative effects occurs within an angular region that is consistent with expectations of a universal hadronization regime that scales with jet momentum for a given initiator flavor. Additionally, a deviation from Monte Carlo predictions at small angles in the charge-selected sample could result from mechanics of hadronization not fully captured by current models.

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