Λ-Hyperon Global Polarization in Au+Au Collisions at RHIC

Selyuzhenkov

Chinese Physics C> 2007, Vol. 31> Issue(12) : 1185-1188

Λ-Hyperon Global Polarization in Au+Au Collisions at RHIC

Selyuzhenkov ^,

Wayne State University, 666 W Hancock, Detroit MI 48201, USA

Abstract
HTML
Reference
Related

PDF

Abstract：
We present the Λ-hyperon global polarization in Au+Au collisions at s_NN=62GeV and 200GeV measured with the STAR detector at RHIC. The observed Λ-hyperon global polarization is consistent with zero, what is in agreement with recent measurements of Λ global polarization, as well as φ(1020) and K^*0(892) vector mesons spin alignment with respect to the reaction plane. The possible dependence of the global polarization on relative azimuthal angle between the orbital momentum of the system and the hyperon 3-momentum is discussed. The corresponding systematic uncertainty due to detector acceptance is found to be less than 20%.

References

[1]

. LIANG Z T, WANG X N. Phys. Rev. Lett., 2005, 94:102301; Erratum: ibid. 2006, 96: 0399012. Voloshin S A. arXiv:nucl-th/04100893. LIANG Z T, WANG X N. Phys. Lett., 2005, B629: 204. GAO Jian-Hua, LIANG Z T. Talk at International Work-shop on “Hadron Physics and Property of High Baryon Density Matter". November 24, 2006, Xi'an, China5. Selyuzhenkov I (STAR Collaboration). Rom. Rep. Phys.,2006, 58: 0496. Selyuzhenkov I (STAR Collaboration). J. Phys., 2006,G32: S5577. CHEN J H (STAR Collaboration). Talk at QM2006 November 13, 2006, Shanghai, China8. Eidelman S et al. (Particle Data Group). Phys. Lett., 2004,B592: 19. Anderson M et al. Nucl. Instrum. Methods, 2003, A499:65910. Voloshin S, ZHANG Y. Z. Phys., 1996, C70: 665.arXiv:hep-ph/940728211. Poskanzer A M, Voloshin S A. Phys. Rev., 1998, C58: 167112. Ackermann K H et al. (STAR Collaboration). Nucl. Instrum. Methods, 2003, A499: 71313. Selyuzhenkov I (STAR Collaboration). AIP Conf. Proc.,2006, 870: 712

[1]	LIU Chang-Long , LU Yi-Ying , YIN LI . Effects of Additional Vacancy-Like Defects Produced by Ion Impealations on Boron Thermal Diffusion in Silicon. Chinese Physics C, 2005, 29(11): 1107-1111.
[2]	SHEN Shui-Fa , YU Xiao-Han . Decay of ⁸³Sr and Discussion of Its Daughter's Band Structures. Chinese Physics C, 2004, 28(S1): 78-80.
[3]	Medina Ablikim , HUANG Wei-Cheng , . New Realization of N=2 Supersymmetric QuantumMechanics and Shape Invariance. Chinese Physics C, 2002, 26(4): 338-345.
[4]	Guo Hua . In-medium QMC Model Parameters and Quark Condensation in Nuclear Matter. Chinese Physics C, 1999, 23(5): 459-468.
[5]	Yang Jianjun , Ma Boqiang , Li Guanglie . Non-perturbative Quark Propagator and the Study of the Non-trivial Q² Dependence in the Nucleon Structure Functions. Chinese Physics C, 1997, 21(2): 146-156.
[6]	Yu Hong , Shen Qixing , Zhang Lin . Angular Distribution of Process e⁺e^－→τ⁺τ^－,τ^－→a₁υτ,a₁→ρπ and Characteristics of a₁ Meson. Chinese Physics C, 1994, 18(7): 583-590.
[7]	BES Collaboration . Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay. Chinese Physics C, 1993, 17(2): 97-106.
[8]	SANG Jian-Ping , LIU Chao-Shan , LIU Yong . Relation Between the Gap at Z=64 Subshell and the Abrupt Transition in the Region N=88～90. Chinese Physics C, 1991, 15(2): 150-157.
[9]	HOU Ren-Chang , ZHAO Xuan . QUADRUPOLE-OCTUPOLE TWO-PHONON EXCITATIONS IN INELASTIC SCATTERING. Chinese Physics C, 1983, 7(2): 236-244.
[10]	Sa Ben-hao , Zhang Xi-zhen , Li Zhu-xia , Shi Yi-jin . A PRIMARY RESEARCH OF THE PHONON RENORMALIZATION OF NUCLEAR FIELD THEORY. Chinese Physics C, 1980, 4(3): 398-400.

Access

Get Citation

Selyuzhenkov. Λ-Hyperon Global Polarization in Au+Au Collisions at RHIC[J]. Chinese Physics C, 2007, 31(12): 1185-1188.

Selyuzhenkov. Λ-Hyperon Global Polarization in Au+Au Collisions at RHIC[J]. Chinese Physics C, 2007, 31(12): 1185-1188. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2007-07-17
Revised: 1900-01-01

Article Metric

Article Views(3576)
PDF Downloads(587)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Λ-Hyperon Global Polarization in Au+Au Collisions at RHIC

Selyuzhenkov ^,

Corresponding author: Selyuzhenkov,

Wayne State University, 666 W Hancock, Detroit MI 48201, USA

Received Date: 2007-07-17
Accepted Date: 1900-01-01
Available Online: 2007-12-05

Abstract: We present the Λ-hyperon global polarization in Au+Au collisions at s_NN=62GeV and 200GeV measured with the STAR detector at RHIC. The observed Λ-hyperon global polarization is consistent with zero, what is in agreement with recent measurements of Λ global polarization, as well as φ(1020) and K^*0(892) vector mesons spin alignment with respect to the reaction plane. The possible dependence of the global polarization on relative azimuthal angle between the orbital momentum of the system and the hyperon 3-momentum is discussed. The corresponding systematic uncertainty due to detector acceptance is found to be less than 20%.