双 Parton 散射与射流淬火

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2024-05-28 DOI:10.1134/s0021364024601064

S. P. Baranov, A. V. Lipatov, M. A. Malyshev, A. M. Snigirev

{"title":"双 Parton 散射与射流淬火","authors":"S. P. Baranov, A. V. Lipatov, M. A. Malyshev, A. M. Snigirev","doi":"10.1134/s0021364024601064","DOIUrl":null,"url":null,"abstract":"A novel observable, the double nuclear modification factor, is proposed to probe simultaneously the initial and final state effects in nucleus-nucleus collisions. An interesting competition between the combinatorial enhancement in the double parton scattering and the suppression due to parton energy loss can be observed in the production rate of two hard particles. In particular, the production of J/ψ mesons in association with a W boson is not suppressed but is enhanced in the region of moderate transverse momenta, unlike the case of unassociated (inclusive) J/ψ production. At the same time, in the region of high enough transverse momenta the nuclear modification factor for associated J/ψ + W production converges to that of unassociated J/ψ.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Double Parton Scattering Versus Jet Quenching\",\"authors\":\"S. P. Baranov, A. V. Lipatov, M. A. Malyshev, A. M. Snigirev\",\"doi\":\"10.1134/s0021364024601064\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A novel observable, the double nuclear modification factor, is proposed to probe simultaneously the initial and final state effects in nucleus-nucleus collisions. An interesting competition between the combinatorial enhancement in the double parton scattering and the suppression due to parton energy loss can be observed in the production rate of two hard particles. In particular, the production of J/ψ mesons in association with a W boson is not suppressed but is enhanced in the region of moderate transverse momenta, unlike the case of unassociated (inclusive) J/ψ production. At the same time, in the region of high enough transverse momenta the nuclear modification factor for associated J/ψ + W production converges to that of unassociated J/ψ.\",\"PeriodicalId\":604,\"journal\":{\"name\":\"JETP Letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2024-05-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"JETP Letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1134/s0021364024601064\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"JETP Letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1134/s0021364024601064","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

我们提出了一种新的观测指标--双核修正因子，以同时探测核-核碰撞中的初态和终态效应。在两个硬粒子的产生率中，可以观察到双偏子散射的组合增强与偏子能量损失导致的抑制之间的有趣竞争。特别是，与 W 玻色子结合的 J/ψ 介子的产生并没有被抑制，而是在中等横坐标矩区域得到了增强，这与未结合（包含）的 J/ψ 产生的情况不同。同时，在足够高的横截面矩区域，相关J/ψ+ W产生的核修正因子趋近于非相关J/ψ产生的核修正因子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Double Parton Scattering Versus Jet Quenching

A novel observable, the double nuclear modification factor, is proposed to probe simultaneously the initial and final state effects in nucleus-nucleus collisions. An interesting competition between the combinatorial enhancement in the double parton scattering and the suppression due to parton energy loss can be observed in the production rate of two hard particles. In particular, the production of J/ψ mesons in association with a W boson is not suppressed but is enhanced in the region of moderate transverse momenta, unlike the case of unassociated (inclusive) J/ψ production. At the same time, in the region of high enough transverse momenta the nuclear modification factor for associated J/ψ + W production converges to that of unassociated J/ψ.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.