Enhancement of baryon-to-meson ratios around jets as a signature of medium response
Enhancement of baryon-to-meson ratios around jets as a signature of medium response
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DOI：
10.1016/j.physletb.2022.137638
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发表时间：
2021-09
影响因子：
4.4
通讯作者：
Ao Luo;Y. Mao;G. Qin;E. Wang;Han-zhong Zhang
中科院分区：
文献类型：
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作者：
Ao Luo;Y. Mao;G. Qin;E. Wang;Han-zhong Zhang
我们提出了射流诱导介质激发的独特信号：在淬灭射流周围重子与介子比值的增强。为了说明这一点，我们通过多相输运模型研究了大型强子对撞机Pb+Pb碰撞中射流-粒子的相关性和射流诱导识别粒子在射流方向上的分布。我们发现，在Pb+Pb碰撞中，相对于p+p碰撞，在触发喷流周围的中间横向动量处，伴生粒子的重子-介子比有很强的增强，这是由于喷流激发的介质部分的合并。由于射流损失的能量可以扩散到很大的角度，这种重子与介子之比的增强在与射流轴的相对距离较大时更为明显。我们认为，实验证实了射流周围由射流引起的重子-介子比的增强，将为重离子碰撞中介质对射流淬火的响应提供明确的证据。
We present a unique signal of jet-induced medium excitations: the enhancement of baryon-to-meson ratios around the quenched jets. To illustrate this, we study jet-particle correlations and the distributions of jet-induced identified particles with respect to the jet direction in Pb+Pb collisions at the LHC via a multi-phase transport model. We find a strong enhancement of baryon-to-meson ratios for associated particles at intermediate transverse momentum around the triggered jets in Pb+Pb collisions relative to p+p collisions, due to the coalescence of jet-excited medium partons. Since the lost energy from jets can diffuse to large angles, such baryon-to-meson-ratio enhancement is more pronounced for larger relative distance from the jet axis. We argue that the experimental confirmation of the enhancement of jet-induced baryon-to-meson ratios around the jets will provide an unambiguous evidence for the medium response to jet quenching in heavy-ion collisions.