Summary
We present preliminary results of the STAR experiment at RHIC on exotic particle searches in minimum bias Au+Au collisions at √{<i>sNN</i>} = 200 GeV. We observe a narrow peak at 1734 ± 0.5 ± 5 MeV in the Λ K0 <i>s</i> invariant mass with width consistent with the experimental resolution of about 6 MeV within the errors. The statistical significance can be quantified between 3 and 6 σ depending on cuts and methods. If this peak corresponds to a real particle state it would be a candidate for the N0 or the Ξ0 <i>I</i> = ˝ pentaquark states.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
A. Manohar, Nucl. Phys. B248 (1984) 19; M. Preszalowicz, World Scientific (1987) 112 [hep-ph/0308114].
T. Nakano et al. (LEPS Collaboration), Phys. Rev. Lett. 91 (2003) 012002.
S. Stepanyan et al. (CLAS Collaboration), Phys. Rev. Lett. 91, (2003) 252001; J. Barth et al. (SAPHIR Collaboration), Phys. Lett. B572 (2003) 127; V. Kubarovsky et al. (CLAS Collaboration), Phys. Rev. Lett. 92 (2004) 032001; V. Barmin et al. (DIANA Collaboration), Phys. Atom. Nucl. 66 (2003) 1715; HERMES Collaboration, Phys. Lett. B585 (2004) 213 [hep-ex/0312044]; A.E. Asratyan et al., Phys. Atom. Nucl. 67 (2004) 682; [Yad. Fiz. 67 (2004) 704; hep-ex/0309042]; ZEUS Collaboration, hep-ex/0403051; COSY-TOF Collaboration, Phys. Lett. B595 (2004) 127 [hep-ex/0403011].
D. Diakonov, M. Polyakov and V. Petrov, Z. Phys. C 359 (1997) 305.
C. Alt et al. (NA49 Collaboration), Phys. Rev. Lett. 92 (2004) 042003; K. Kadija, talk presented in the Pentaquark 2003 Workshop, Jefferson Lab, November 6–8, 2003, Virginia, USA.
A. Aktas et al. (H1 Collaboration), hep-ex/0403017.
K.H. Ackermann et al., Nucl. Instr. Meth. A499 (2003) 624.
M. Anderson et al., Nucl. Instr. Meth. A499 (2003) 659.
C. Adler et al. (STAR Collaboration), Phys. Rev. Lett. 89 (2002) 132301.
K. Hagiwara et al., Phys. Rev. D66 (2002) 010001.
D. Diakonov and V. Petrov, Phys. Rev. D69 (2004) 094011 [hep-ph/0310212].
J. Ellis et al., JHEP 0405:002 (2004) [hep-ph/0401127].
R.A. Arndt et al., Phys. Rev. C69 035208.
R.L. Jaffe and F. Wilczek, Phys. Rev. Lett. 91 (2003) 232003.
C. Adler et al. (STAR Collaboration), Phys. Lett. B567 (2003) 167.
S. Salur et al. (STAR Collaboration), nucl-ex/0403009.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kabana, S., STAR Collaboration Exotic Particle Searches with STAR at RHIC. Acta Physica Hungarica 24, 321–328 (2005). https://doi.org/10.1556/APH.24.2005.1-4.44
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1556/APH.24.2005.1-4.44