As a model of the longitudinal structure in heavy ion collisions, we simulate gravitational shock wave collisions in anti-de Sitter space in which each shock is composed of multiple constituents. We find that all constituents act coherently, and their separation leaves no imprint on the resulting plasma, when this separation is ≲0.26/T_{hyd}, with T_{hyd} the temperature of the plasma at the time when hydrodynamics first becomes applicable. In particular, the center-of-mass of the plasma coincides with the center-of-mass of all the constituents participating in the collision, as opposed to the center-of-mass of the individual collisions. We discuss the implications for nucleus-nucleus and proton-nucleus collisions.
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http://dx.doi.org/10.1103/PhysRevLett.112.221602 | DOI Listing |
JBJS Case Connect
January 2025
Department of Orthopedic Surgery, Albany Medical Center, Albany, New York.
Case: We present the case of a 24-year-old woman who sustained a left midshaft clavicle fracture with acute subclavian artery compression, subclavian vein laceration, and complete brachial plexus palsy after a motor vehicle collision. The patient underwent urgent open reduction internal fixation of the clavicle and repair of the subclavian vein. Two years later, she underwent opponensplasty and flexor digitorum profundus tendon transfers.
View Article and Find Full Text PDFAnn Med
December 2025
Graduate Institute of Injury Prevention and Control, Taipei Medical University, Taipei, Taiwan, ROC.
Background: The reverse shock index multiplied by simplified motor score (rSI-sMS) is a novel and rapid measure for assessing injury severity in patients with trauma in prehospital settings; however, its discriminant ability requires further validation.
Methods: A retrospective cohort study was conducted from trauma database of Taipei Tzu Chi Hospital to compare the accuracy of the rSI-sMS with that of the shock index, modified shock index, reverse shock index multiplied by the Glasgow Coma Scale (rSI-GCS), and the reverse shock index multiplied by GCS motor subscale (rSI-GCSM) for discriminating in-hospital mortality, intensive care unit (ICU) admissions, prolonged ICU stays ≥14 days, and prolonged hospital stays ≥30 days in patients with trauma.
Results: A total of 11,760 patients from the trauma database were included.
J Trauma Nurs
January 2025
Department of Surgery, Morristown Medical Center, Morristown, New Jersey.
Background: Motorcycle and equestrian accidents can share similar trauma mechanisms and can result in serious injuries.
Objective: This study aims to analyze variations in injuries and safety standards through types, severity, and outcomes of traumatic injuries in both motorcycle and equestrian riders.
Methods: Using the 2020 ACS TQIP database, we split patients into two groups based on their primary injury.
J Phys Chem A
January 2025
Department of Chemistry and Chemical Biology, Center for Computational Chemistry, University of New Mexico, Albuquerque, New Mexico 87131, United States.
The kinetics of electronically inelastic quenching of O(Δ) and O(Σ) by collisions with O(P) have been investigated using mixed quantum-classical trajectories governed by adiabatic potential energy surfaces and state couplings generated from a recently developed diabatic potential energy matrix (DPEM) for the 14 lowest-energy A' states of O. Using the coherent switching with decay of mixing (CSDM) method, dynamics calculations were performed both with 14 coupled electronic states and with 8 coupled electronical states, and similar results were obtained. The calculated thermal quenching rate coefficients are generally small, but they increase with temperature.
View Article and Find Full Text PDFPhys Rev Lett
December 2024
State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
Using the e^{+}e^{-} collision data collected with the BESIII detector operating at the BEPCII collider, at center-of-mass energies from the threshold to 4.95 GeV, we present precise measurements of the cross section for the process e^{+}e^{-}→D_{s}^{+}D_{s}^{-} using a single-tag method. The resulting cross section line shape exhibits several new structures, thereby offering an input for a future coupled-channel analysis and model tests, which are critical to understand vector charmonium-like states with masses between 4 and 5 GeV.
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