Λ-Anomaly in the Hadronic Chemical Freeze-Out

  • V. V. Sagun Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
Keywords: hadron multiplicities, hard-core repulsion, chemical freeze-out, strangeness suppression

Abstract

A new way to overcome the Λ hyperon selective suppression, which is known as the Λ-anomaly, has been suggested. In particular, the additional radius of a Λ hyperon is introduced into the model of hadron resonance gas with the multicomponent hard-core repulsion. The proposed approach allows one to describe the hadron multiplicity ratios measured at the AGS, SPS, and RHIC energies with the accuracy x2/dof = 52/55 ≃ 0.95.

References

P. Braun-Munzinger, K. Redlich, and J. Stachel, in QuarkGluon Plasma 3, edited by R.C. Hwa and X.N. Wang (World Scientific, Singapore, 2004), p. 491.

A. Andronic, P. Braun-Munzinger, and J. Stachel, Nucl. Phys. A 772, 167 (2006) and references therein.

https://doi.org/10.1016/j.nuclphysa.2006.03.012

K.A. Bugaev, D.R. Oliinychenko, A.S. Sorin, and G.M. Zinovjev, Eur. Phys. J. A 49, 30 (2013) and references therein.

https://doi.org/10.1140/epja/i2013-13030-y

K.A. Bugaev, D.R. Oliinychenko, J. Cleymans, A.I. Ivanytskyi, I.N. Mishustin, E.G. Nikonov, and V.V. Sagun, Europhys. Lett. 104, 22002 (2013).

https://doi.org/10.1209/0295-5075/104/22002

J. Stachel, A. Andronic, P. Braun-Munzinger, and K. Redlich, arXiv: 1311.4662[nucl-th].

J. Rafelski, Phys. Lett. B 62, 333 (1991).

https://doi.org/10.1016/0370-2693(91)91576-H

F. Becattini, J. Manninen, and M. Gazdzicki, Phys. Rev. C 73, 044905 (2006).

https://doi.org/10.1103/PhysRevC.73.044905

P. Braun-Munzinger, D. Magestro,K. Redlich, and J. Stachel, Phys. Lett. B 518, 41 (2001).

https://doi.org/10.1016/S0370-2693(01)01069-3

V.V. Sagun, D.R. Oliinychenko, K.A. Bugaev, J. Cleymans, A.I. Ivanytskyi, I.N. Mishustin, and E.G. Nikonov, arXiv: 1403.6311[hep-ph].

S. Chatterjee, R.M. Godbole, and S. Gupta, Phys. Lett. B 727, 554 (2013).

https://doi.org/10.1016/j.physletb.2013.11.008

D.R. Oliinychenko, V.V. Sagun, A.I. Ivanytskyi, and K.A. Bugaev, arXiv: 1403.5744[hep-ph].

G. Zeeb, K.A. Bugaev, P.T. Reuter, and H. St¨ocker, Ukr. J. Phys. 53, 279 (2008).

D.R. Oliinychenko, K.A. Bugaev, and A.S. Sorin, Ukr. J. Phys. 58, 211 (2013).

https://doi.org/10.15407/ujpe58.03.0211

K.A. Bugaev, D.R. Oliinychenko, V.V. Sagun, A.I. Ivanytskyi, J. Cleymans, E.G. Nikonov, and G.M. Zinovjev, arXiv: 1312.5149 [hep-ph].

A. Andronic, P. Braun-Munzinger, and J. Stachel, Phys. Lett. B 673, 142 (2009).

https://doi.org/10.1016/j.physletb.2009.02.014

B.B. Back et al., Phys. Rev. Lett. 87, 242301 (2001).

https://doi.org/10.1103/PhysRevLett.87.242301

F. Becattini et al., Phys. Rev. C 85, 044921 (2012).

https://doi.org/10.1103/PhysRevC.85.044921

F. Becattini et al., Phys. Rev. Lett. 111, 082302 (2013).

https://doi.org/10.1103/PhysRevLett.111.082302

R. Hagedorn, Nuovo Cim. Suppl. 3, 147 (1965).

T.D. Lee and C.N. Yang, Phys. Rev. 87, 3 (1952).

https://doi.org/10.1103/PhysRev.87.410

K.A. Bugaev, A.I. Ivanytskyi, D.R. Oliinychenko, E.G. Nikonov, V.V. Sagun, and G.M. Zinovjev, arXiv: 1312.4367[hep-ph].

S. Wheaton, J. Cleymans, and M. Hauer, Comput. Phys. Commun. 180, 84 (2009).

https://doi.org/10.1016/j.cpc.2008.08.001

J.L. Klay et al., Phys. Rev. C 68, 054905 (2003).

https://doi.org/10.1103/PhysRevC.68.054905

L. Ahle et al., Phys. Lett. B 476, 1 (2000).

https://doi.org/10.1016/S0370-2693(00)00037-X

B.B. Back et al., Phys. Rev. Lett. 86, 1970 (2001).

https://doi.org/10.1103/PhysRevLett.86.1970

J.L. Klay et al., Phys. Rev. Lett. 88, 102301 (2002).

https://doi.org/10.1103/PhysRevLett.88.102301

C. Pinkenburg et al., Nucl. Phys. A 698, 495c (2002).

https://doi.org/10.1016/S0375-9474(01)01412-9

P. Chung et al., Phys. Rev. Lett. 91, 202301 (2003).

https://doi.org/10.1103/PhysRevLett.91.202301

B.B. Back et al., Phys. Rev. C 69, 054901 (2004).

https://doi.org/10.1103/PhysRevC.69.054901

S. Albergo et al., Phys. Rev. Lett. 88, 062301 (2002).

https://doi.org/10.1103/PhysRevLett.88.062301

S.V. Afanasiev et al., Phys. Rev. C 66, 054902 (2002).

https://doi.org/10.1103/PhysRevC.66.054902

S.V. Afanasiev et al., Phys. Rev. C 69, 024902 (2004).

https://doi.org/10.1103/PhysRevC.69.024902

T. Anticic et al., Phys. Rev. Lett. 93, 022302 (2004).

https://doi.org/10.1103/PhysRevLett.93.022302

S.V. Afanasiev et al., Phys. Lett. B 538, 275 (2002).

https://doi.org/10.1016/S0370-2693(02)01970-6

C. Alt et al., Phys. Rev. Lett. 94, 192301 (2005).

https://doi.org/10.1103/PhysRevLett.94.192301

S.V. Afanasiev et al., Phys. Lett. B 491, 59 (2000).

https://doi.org/10.1016/S0370-2693(00)01023-6

B. Abelev et al., Phys. Rev. C 81, 024911 (2010).

https://doi.org/10.1103/PhysRevC.81.024911

B. Abelev et al., Phys. Rev. C 79, 034909 (2009).

https://doi.org/10.1103/PhysRevC.79.034909

J. Adams et al., Phys. Rev. Lett. 92, 182301 (2004).

https://doi.org/10.1103/PhysRevLett.92.182301

J. Adams et al., Phys. Lett. B 567, 167 (2003).

https://doi.org/10.1016/j.physletb.2003.06.039

C. Adler et al., Phys. Rev. C 65, 041901(R) (2002).

J. Adams et al., Phys. Rev. Lett. 92, 112301 (2004).

https://doi.org/10.1103/PhysRevLett.92.112301

J. Adams et al., Phys. Lett. B 612, 181 (2005).

https://doi.org/10.1016/j.physletb.2004.12.082

A. Billmeier et al., J. Phys. G 30, S363 (2004).

https://doi.org/10.1088/0954-3899/30/1/043

Published
2018-10-24
How to Cite
Sagun, V. (2018). Λ-Anomaly in the Hadronic Chemical Freeze-Out. Ukrainian Journal of Physics, 59(8), 755. https://doi.org/10.15407/ujpe59.08.0755
Section
Fields and elementary particles

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