skip to main content

Attention:

The NSF Public Access Repository (NSF-PAR) system and access will be unavailable from 11:00 PM ET on Friday, November 15 until 2:00 AM ET on Saturday, November 16 due to maintenance. We apologize for the inconvenience.


This content will become publicly available on May 2, 2025

Title: Topologically protected exceptional points and reentrant PT phase in an exact ternary model
NSF-PAR ID:
10509297
Author(s) / Creator(s):
; ; ; ;
Publisher / Repository:
American Physical Society
Date Published:
Journal Name:
Physical Review A
Volume:
109
Issue:
5
ISSN:
2469-9926; PLRAAN
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. The production of πœ‚ and πœ‚β€² mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. Proton-proton collisions are studied at center-of-mass energies of 5.02 and 13TeV and proton-lead collisions are studied at a center-of-mass energy per nucleon of 8.16TeV. The studies are performed in center-of-mass (c.m.) rapidity regions 2.5<𝑦c.m.<3.5 (forward rapidity) and βˆ’4.0<𝑦c.m.<βˆ’3.0 (backward rapidity) defined relative to the proton beam direction. The πœ‚ and πœ‚β€² production cross sections are measured differentially as a function of transverse momentum for 1.5<𝑝T<10GeV and 3<𝑝T<10GeV, respectively. The differential cross sections are used to calculate nuclear modification factors. The nuclear modification factors for πœ‚ and πœ‚β€² mesons agree at both forward and backward rapidity, showing no significant evidence of mass dependence. The differential cross sections of πœ‚ mesons are also used to calculate πœ‚/πœ‹0 cross-section ratios, which show evidence of a deviation from the world average. These studies offer new constraints on mass-dependent nuclear effects in heavy-ion collisions, as well as πœ‚ and πœ‚β€² meson fragmentation. 
    more » « less