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DOE OSTI · 3003473

Search for baryon junctions in e+A collisions at the electron ion collider

Magdy, Niseem [The State University of New York, Stony Brook, NY (United States); University of Tennessee, Knoxville, TN (United States)] (ORCID:0000000264586552)·Deshpande, Abhay [The State University of New York, Stony Brook, NY (United States); Stony Brook University, NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000337244749)·Lacey, Roy [The State University of New York, Stony Brook, NY (United States); Stony Brook University, NY (United States)] (ORCID:000000027934314X)·Li, Wenliang [The State University of New York, Stony Brook, NY (United States); Stony Brook University, NY (United States); Mississippi State University, Starkville, MS (United States)] (ORCID:0000000281088045)·Tribedy, Prithwish [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000276546021)·Xu, Zhangbu [Brookhaven National Laboratory (BNL), Upton, NY (United States); Kent State University, OH (United States)] (ORCID:0000000188530409)
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Abstract

Constituent quarks in a nucleon are the essential elements in the standard “quark model” associated with the electric charge, spin, mass, and baryon number of a nucleon. Quantum chromodynamics (QCD) describes nucleon as a composite object containing current quarks (valence quarks and sea (anti-)quarks) and gluons. These subatomic elements and their interactions are known to contribute in complex ways to the overall nucleon spin and mass. In the early development of QCD theory in the 1970s, an alternative hypothesis postulated that the baryon number might manifest itself through a non-perturbative configuration of gluon fields forming a Y-shaped topology known as the gluon junction. In this work, we propose to test such hypothesis by measuring (i) the Regge intercept of the net-baryon distributions for e+(p)Au collisions, (ii) baryon and charge transport in the isobaric ratio between e+Ru and e+Zr collisions, and (iii) target flavor dependence of proton and antiproton yields at large rapidity, transported from the hydrogen and deuterium targets in e+p(d) collisions. Our study indicates that these measurements at the EIC can help determine what carries the baryon number.

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73 NUCLEAR PHYSICS AND RADIATION PHYSICSEIC Y-shaped topologyQCDbaryon junctionconstituent quarks

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Magdy, Niseem [The State University of New York, Stony Brook, NY (United States); University of Tennessee, Knoxville, TN (United States)] (ORCID:0000000264586552), Deshpande, Abhay [The State University of New York, Stony Brook, NY (United States); Stony Brook University, NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000337244749), Lacey, Roy [The State University of New York, Stony Brook, NY (United States); Stony Brook University, NY (United States)] (ORCID:000000027934314X), Li, Wenliang [The State University of New York, Stony Brook, NY (United States); Stony Brook University, NY (United States); Mississippi State University, Starkville, MS (United States)] (ORCID:0000000281088045), Tribedy, Prithwish [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000276546021), Xu, Zhangbu [Brookhaven National Laboratory (BNL), Upton, NY (United States); Kent State University, OH (United States)] (ORCID:0000000188530409). 2024-12-27. Search for baryon junctions in e+A collisions at the electron ion collider. https://doi.org/10.1140/epjc%2Fs10052-024-13702-9

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