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Title: Tensor supercurrent in QCD

Journal Article · · Physical Review. D.
 [1]; ORCiD logo [2]
  1. Institute for Information Transmission Problems of the Russian Academy of Sciences, Moscow (Russia); Moscow Institute of Physics and Technology, Dolgoprudny (Russia)
  2. Stony Brook University, NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

An external Abelian magnetic field excites in the QCD vacuum a tensor supercurrent that represents the tensor polarization of the chiral condensate. This tensor supercurrent can be deduced from the chiral Lagrangian in the presence of anomalies; a similar tensor supercurrent emerges in rotating systems at finite chemical potential. We discuss the microscopic origin of this supercurrent and argue that it screens the instanton–anti-instanton molecules II¯ in the QCD vacuum, similarly to the vector supercurrent screening Abrikosov vortices in a superconductor. A number of possible experimental manifestations of the tensor supercurrent are discussed: (i) spin alignment of axial-vector and vector mesons in heavy ion collisions; (ii) tensor charge of the nucleon; (iii) transversity of quark distributions in polarized nucleons.

Research Organization:
Stony Brook Univ., NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); Basis Foundation; Russian Foundation for Basic Research (RFBR)
Grant/Contract Number:
FG02-88ER40388; AC02-98CH10886; FG-88ER40388; SC0012704; 19-02-00214
OSTI ID:
1631499
Alternate ID(s):
OSTI ID: 1638821; OSTI ID: 2280529
Report Number(s):
BNL-216148-2020-JAAM; TRN: US2408189
Journal Information:
Physical Review. D., Vol. 101, Issue 11; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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