Effect of Chiral Symmetry Restoration on Pentaquark ${\Theta }^{+}$ Mass and Width at Finite Temperature and Density

Abstract

We investigate the effect of chiral phase transition on the pentaquark ${\Theta }^{+}$ mass and width at one-loop level of $N{\Theta }^{+}K$ coupling at finite temperature and density. The behavior of the mass, especially the width in hadronic medium is dominated by the characteristics of chiral symmetry restoration at high temperature and high density. The mass and width shifts of positive-parity ${\Theta }^{+}$ are much larger than that of negative-parity one, which may be helpful to determine the parity of ${\Theta }^{+}$ in high energy nuclear collisions.

arXiv comment7 pages, 5 figures

References in corpus (27)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Critical point of QCD at finite T and μ, lattice results for physical quark masses
• Diquarks and Exotic Spectroscopy
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron
• Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Evidence for the positive-strangeness pentaquark ${\Theta }^{+}$ in photoproduction with the SAPHIR detector at ELSA
• Observation of an Exotic Baryon with S=+1 in Photoproduction from the Proton
• Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
• Evidence for a narrow baryonic state decaying to K0s-p and K0s-pbar in deep inelastic scattering at HERA
• Evidence for a narrow resonance at 1530 MeV/c2 in the K0 p - system of the reaction pp --> Sigma+ K0 p from the COSY-TOF experiment
• Evidence for formation of a narrow pKshort resonance with mass near 1533 MeV in neutrino interactions
• Pentaquark hadrons from lattice QCD
• Understanding Pentaquark States in QCD
• Stable $uudd\bar{s}$ pentaquarks in the constituent quark model
• Lattice study of exotic S=+1 baryon
• Penta-quark baryon from the QCD Sum Rule
• Phenomenology of the Pentaquark Antidecuplet
• A study of pentaquarks on the lattice with overlap fermions
• Are ${\Theta }^{+}$ and the Roper resonance diquark-diquark-antiquark states?
• Pentaquark states in a chiral potential
• Search for the ${\bar{\Theta }}^{-}\to$ K${}^{-}$ $\bar{n}$ with PHENIX
• Photoproduction of Theta baryon from the neutron
• Pentaquark baryon production at the Relativistic Heavy Ion Collider
• A study of pentaquark $\Theta$ state in the chiral SU(3) quark model
• A Naturally Narrow Positive Parity Theta^+
• The Narrow ${\Theta }_5$ Pentaquark As The First Non-planar Hadron With the Diamond Structure And Negative Parity

Cited by in corpus (1)

• Photoproduction of Pentaquark ${\Theta }^{+}$ and Chiral Symmetry Restoration in Hot and Dense Medium