Spin Alignment of Vector Mesons K<SUP>*0</SUP>(892) and φ(1020) in Au+Au and p+p Collsions at s<SUB>NN</SUB>=200GeV

TANG Ze-Bo

Chinese Physics C> 2007, Vol. 31> Issue(12) : 1192-1195

Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV

TANG Ze-Bo ^,

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

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We present the preliminary results on the spin alignment matrix element ρ₀₀ for vector mesons K^*0(892) and φ(1020) in mid-central (20%—60%) Au+Au and p+p collisions at s_NN=200GeV. The values of ρ₀₀ with respect to reaction plane in Au+Au collisions are 0.36±0.02(stat)±0.13(sys) for K^*0(892) and 0.38±0.01 (stat)±0.04 (sys) for φ(1020). No evident global spin alignment with respect to reaction plane is observed in the measured p_T region up to 5GeV/c with current sensitivity. ρ₀₀ with respect to the production plane of the vector meson is also measured for K^*0(892) and φ(1020) in Au+Au collisions, and for φ(1020) in p+p collisions. No significant difference for the ρ₀₀ between Au+Au and p+p collisions is observed with our data sample.

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TANG Ze-Bo. Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV[J]. Chinese Physics C, 2007, 31(12): 1192-1195.

TANG Ze-Bo. Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV[J]. Chinese Physics C, 2007, 31(12): 1192-1195. shu

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

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Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV

TANG Ze-Bo ^,

Corresponding author: TANG Ze-Bo,

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

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

Abstract: We present the preliminary results on the spin alignment matrix element ρ₀₀ for vector mesons K^*0(892) and φ(1020) in mid-central (20%—60%) Au+Au and p+p collisions at s_NN=200GeV. The values of ρ₀₀ with respect to reaction plane in Au+Au collisions are 0.36±0.02(stat)±0.13(sys) for K^*0(892) and 0.38±0.01 (stat)±0.04 (sys) for φ(1020). No evident global spin alignment with respect to reaction plane is observed in the measured p_T region up to 5GeV/c with current sensitivity. ρ₀₀ with respect to the production plane of the vector meson is also measured for K^*0(892) and φ(1020) in Au+Au collisions, and for φ(1020) in p+p collisions. No significant difference for the ρ₀₀ between Au+Au and p+p collisions is observed with our data sample.

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Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV

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Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV

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Spin Alignment of Vector Mesons K*0(892) and φ(1020) in Au+Au and p+p Collsions at sNN=200GeV

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Spin Alignment of Vector Mesons K*0(892) and φ(1020) in Au+Au and p+p Collsions at sNN=200GeV

Corresponding author: TANG Ze-Bo,

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Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV

Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV