PaperPanorama

Nuclear Theory·nucl-th

Friday·October 20, 2023

9 papers2 primary·7 cross-listed

  1. 01

    Does Quarkonia Suppression serve as a probe for the deconfinement in small systems?

    Partha Bagchi🇮🇳 · Arpan Das🇮🇳 · Ananta P. Mishra🇮🇳

    In high multiplicity proton-proton collisions, the formation of a deconfined state of quarks and gluons akin to Heavy Ion Collisions (HIC) has been a subject of significant interest. In proton-proton () collisions, the transverse size of the system is comparable to the longitudinal (Lorentz contracted) dimension, unlike the case in Nucleus-Nucleus () collision, leading to a hitherto unexplored effect of rapid decrease of temperature of the medium on quark-antiquark bound states. This allows us to probe a unique possibility of hadronization occurring before quarkonia dissociation within the medium. In small systems, a rapid change in temperature also introduces sudden changes in the Hamiltonian. This scenario prompts consideration of non-adiabatic evolution, challenging the traditional adiabatic framework. We demonstrate that non-adiabatic evolution may extend the longevity of quark-anti-quark bound states in collisions, even at higher multiplicities, offering new insights into the dynamics of strongly interacting matter produced in smaller collision systems.

    nucl-thhep-phPRD(2024)·9 citations
  2. 02

    Gravitational form factors of light nuclei: Impulse approximation

    Fangcheng He🇺🇸 · Ismail Zahed🇺🇸

    The gravitational form factors of light nuclei are evaluated up to momenta of the order of the nucleon mass, using the impulse approximation. The nucleon gravitational form factors are reduced non-relativistically, and used to derive the gravitational form factors of light nuclei. The deuteron gravitational form factors are analysed using the Reid soft core potential. The helium-4 gravitational form factors are assessed using the K-harmonics method, and compared to those following from a mean-field approximation with a Woods-Saxon potential. The importance of removing the center of mass motion for the ensuing form factors is emphasized. The mass radii of these light nuclei are extracted and compared to their charge radii counterparts. The details of their pressure and shear distributions are discussed.

    nucl-thhep-phPRC(2024)·11 citations

Affiliations

first authorsco-authorsvia INSPIRE