Squeezing effect on D+/ D- with nonzero chemical potential

被引：0
|
作者：
Yin, Hong-Jie [1 ]
Feng, Jia-Hui [1 ]
Zhang, Yong [2 ]
机构：
[1] Bohai Univ, Coll Phys Sci & Technol, Jinzhou 121013, Liaoning, Peoples R China
[2] Jiangsu Univ Technol, Sch Math & Phys, Changzhou 213001, Jiangsu, Peoples R China
来源：
MODERN PHYSICS LETTERS A | 2024年 / 39卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Squeezing effect; in-medium mass splitting; D+ / D-; nonzero chemical potential; D MESONS; SPECTRA;
D O I：
10.1142/S0217732324500421
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The medium mass modification may lead to a squeezing effect. In the baryonic medium, the mass of D meson was expected to reduce and the in-medium masses of D+ and D- may show a splitting effect, and the chemical potential of D meson may be not zero. We study the squeezing effect on the yield ratio D+/ D(- )with nonzero chemical potential. Due to the in-medium mass splitting, the squeezing effect on the momentum distributions of D+ and D- are different. Without the squeezing effect, the yield ratio D+ / D- remains constant as the transverse momentum increases. The yield ratio D+ / D- is affected by the squeezing effect, resulting in a dependence on transverse momentum. An increase in transverse momentum leads to a decrease in the yield ratio, especially when there is a high chemical potential. Additionally, the in-medium mass splitting amplifies this phenomenon. The yield ratio D+ / D- with nonzero chemical potential approaches 1 when there is a large average in-medium mass reduction, which becomes more evident at higher transverse momentum. The study of the squeezing effect on the yield ratio D+ / D- with nonzero chemical potential may be meaningful for the CBM and PANDA experiments of the FAIR project at GSI.
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页数：9
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