sPHENIX is a new detector at RHIC.

["Huang, Jin" <jhuang AT bnl.gov>]

FYI, as forwarded 

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From: Frank Geurts <geurts AT rice.edu>
Sent: Friday, February 14, 2025 7:08:53 AM
To: Huang, Jin <jhuang AT bnl.gov>; Connors, Megan <mconnors AT bnl.gov>; Akiba, Yasuyuki <akiba AT bnl.gov>; Deshpande, Abhay <abhay AT bnl.gov>
Cc: Ruan, Lijuan <ruan AT bnl.gov>
Subject: New STAR paper ready for submission: "Measurement of Two-Point Energy Correlators Within Jets in pp Collisions at √s = 200 GeV"

Dear Abhay, Jin, Megan, and Akiba-san,

We are pleased to announce that STAR plans to submit the following paper for publication in one week.

Target journal: Phys.Rev.Lett.

Title: "Measurement of Two-Point Energy Correlators Within Jets in pp Collisions at √s = 200 GeV"

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 non-perturbative 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 non-perturbative effects occurs within an angular region that is consistent with expectations of a universal hadronization regime that scales with jet momentum. 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.


Best regards,
Frank & Lijuan




________________________________________________________________________
Frank Geurts (he/him)
Professor of Physics & Astronomy • Rice University, Houston TX
T.W. Bonner Nucl. Lab. • Dept. of Physics & Astronomy
office 713-348-5314 • web http://heavyions.rice.edu
________________________________________________________________________