Xin-Nian Wang, a senior scientist in the Nuclear Theory Group in Berkeley Lab’s Nuclear Science Division (NSD), and his collaborators have recently published new research (out today in Physical Review Letters) that explains the spin alignment of vector mesons in heavy-ion collisions, as observed by the STAR Collaboration at the Relativistic Heavy Ion Collider (RHIC).
STAR experiment observes directed flow of hypernuclei connected to neutron stars
June 7, 2023 ~
In research recently published in Physical Review Letters, the STAR collaboration has released the first observations of directed flow of hypernuclei. Xin Dong and Nu Xu, senior scientists in the Relativistic Nuclear Collisions group in Berkeley Lab’s Nuclear Science Division (NSD), are actively involved in this new research.
A Low-Energy ‘Off Switch’ for Quark-Gluon Plasma
June 5, 2023 ~
Physicists can create an exotic state of matter known as a quark-gluon plasma (QGP) by colliding gold nuclei together. By systematically varying the amount of energy involved in the collision, scientists have shown that the QGP exists in collisions at energies from 200 billion electron volts (GeV) down at least to 19.6 GeV. However, its production appears to be “turned off” at the lowest collision energy, 3 GeV. The “off” signal shows up as a sign change—from negative to positive—in data that describe the distribution of protons produced in these collisions.
Newsletter Test Article 3
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Newsletter Test Article 2
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Newsletter Test Article 1
June 1, 2023 ~
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