LHC p-p，p-Pb和Pb-Pb碰撞中正向粒子产生的Cosmic-ray Monte Carlo预测

Study of very forward energy and its correlation with particle production at midrapidity in pp and p-Pb collisions at the LHC

The energy deposited at very forward rapidities (very forward energy) is a powerful tool for characterising proton fragmentation in pp and p$-$Pb collisions. The correlation of very forward energy with particle production at midrapidity provides direct insights into the initial stages and the subsequent evolution of the collision. Furthermore, the correlation with the production of particles with large transverse momenta at midrapidity provides information complementary to the measurements of the underlying event, which are usually interpreted in the framework of models implementing centrality…

LHCb质子-铅和铅-铅碰撞中重味物质的产生

Heavy flavour production in proton-lead and lead-lead collisions with LHCb

LHCb实验提供了一个独特的机会来研究重离子在前向区（2 <eta< 5）的相互作用，在一个运动学领域的补充，在LHC的其他3个大型实验。该探测器具有良好的能力，重建夸克和开放的魅力状态，包括重子，下降到零$p_T$。它可以将提示符和移位符分开。在$p$ Pb碰撞中，由于光束反转的可能性，向前和向后的速度都被涵盖。结果包括对粲偶素、开粲偶素和底偶素态的核修正因子和前向-后向比的测量。这些量是重口味生产中核效应的敏感探针。在LHC运行的2016年$p$ Pb期间，给出了大累积光度的前景。2015年，LHCb首次成功参与了PbPb数据采集。讨论了铅-铅碰撞中前向瞬发J/ $ψ$核修正因子测量的现状。

高能pA碰撞中强子的正向产生：从RHIC到LHC

Forward hadron production in high energy pA collisions: from RHIC to LHC

本文基于胶子饱和的KKT模型，计算了RHIC和LHC能区Pi、D和B介子的产生。讨论了核修正因子对快度和横动量的依赖关系。

LHC和RHIC超周边质子-重离子碰撞中强子的前向产生

Forward hadron production in ultraperipheral proton-heavy-ion collisions at the LHC and RHIC

本文讨论了LHC超周边质子-铅碰撞和RHIC质子-金碰撞中前向快度区的强子产生。我们的讨论是基于蒙特卡罗模拟的虚光子发射的快速移动的核与质子束的相互作用。我们用STARLIGHT事件发生器模拟虚光子流，然后用SOPHIA、DPMJET和PYTHIA事件发生器模拟粒子产生。我们给出了带电粒子和中性粒子的快度分布，以及中性介子和中子在正向快度下的动量分布。根据蒙特卡罗模拟，我们发现大截面的超周边碰撞的粒子生产，特别是在非常前区，导致大量的背景贡献的集体核效应和自旋物理的调查。最后，我们可以区分质子-核非弹性相互作用和超周边碰撞，并对中快度的带电粒子和负前向快度的一定水平的活动提出额外要求。

UPC contribution to forward rapidity gap distribution in pPb collisions at the LHC

In this Letter, we consider strong and electromagnetic (ultraperipheral) mechanisms in proton-nucleus coherent diffraction at the CERN Large Hadron Collider. We explicitly demonstrate the dominance of the latter and explain the CMS data on the forward rapidity gap distribution in $pPb$ collisions at $\sqrt{s_{NN}}=8.16$ TeV. In particular, we provide simple estimates, which give a good, semi-quantitative description of both magnitude and shape of the $Δη^F$ distribution in the Pomeron-proton topology. We also make predictions for the proton-oxygen run.

Snowmass 2021/22 Letter of Interest: A Forward Calorimeter at the LHC

A forward electromagnetic and hadronic calorimeter (FoCal) was proposed as an upgrade to the ALICE experiment, to be installed during LS3 for data-taking in 2027--2029 at the LHC. The FoCal extends the scope of ALICE, which was designed for the comprehensive study of hot and dense partonic matter, by adding new capabilities to explore the small-$x$ parton structure of nucleons and nuclei. The primary objective of the FoCal is high-precision inclusive measurement of direct photons and jets, as well as coincident gamma-jet and jet-jet measurements, in pp and p--Pb collisions. These measurements …

在BNL RHIC和CERN LHC的正向区域寻找内在魅力

Looking for intrinsic charm in the forward region at BNL RHIC and CERN LHC

对强子基本组成和高能强子动力学的全面理解是强相互作用理论面临的两个主要挑战。特别是，强子波函数中内禀重夸克成分的存在必须得到证实（或证伪）。本文基于色玻璃凝聚（CGC）理论，提出了一种在正向快度下产生$D$介子的新机制，并证明了由此产生的横动量谱强烈依赖于大比约肯$x$的粲分布行为.我们的结果清楚地表明，内禀魅力假说可以在RHIC和LHC的$pp$和$p(d) A$碰撞中得到检验。

来自独立源的LHC的前向-后向多重相关

Forward-backward multiplicity correlations at the LHC from independent sources

我们认为，部分子在早期独立地从纵向扩展源发射的叠加方法与$\sqrt{s_{NN}}=2.76 \textrm{ TeV}$上Pb+Pb碰撞中前后多重数关联的实验结果是完全一致的.相关的相关性分析是基于参考文献[1]的博士论文，其中包括对ALICE协作组数据的未发表分析。我们的计算表明，在实验覆盖的赝快度范围$Δη=1.2$，在向后和向前仓中的初始源是最大相关的，这符合弦的解释基本的早期阶段的生产机制。

用前向直接光子探测核PDF和在LHC的胶子饱和

Probing Nuclear PDF and Gluon Saturation At The LHC with Forward Direct Photons

在相对论性核碰撞中，需要解决的一些重要方面是核PDF和胶子饱和的影响。在大型强子对撞机中，解决这些问题的最佳方法是通过pA碰撞，特别是通过测量正向的直接光子产生。为了实现这种测量，提出了一种新的前向量热计（FoCal）作为ALICE实验的升级。所提出的探测器将覆盖3.5 < $η$ < 5的范围，探测x $\sim$ 10 $^{-5}$和Q $\sim p_{\rm T}$ > 4 GeV的胶子分布。我们将讨论性能研究并证明此类测量需要极高粒度的量热法。我们还将介绍一些来自该项目的R\&D结果。

Ultrahigh-energy cosmic rays: Anomalies, QCD, and LHC data

Measurements of proton and nuclear collisions at the Large Hadron Collider at nucleon-nucleon c.m. energies up to $\sqrt{s_{NN}}=$ 13 TeV, have improved our understanding of hadronic interactions at the highest energies reached in collisions of cosmic rays with nuclei in the earth atmosphere, up to $\sqrt{s_{NN}}\approx 450$ TeV. The Monte Carlo event generators (EPOS, QGSJET, and SIBYLL) commonly used to describe the air showers generated by ultrahigh-energy cosmic rays (UHECR, with $E_{CR}\approx 10^{17}$--$10^{20}$ eV) feature now, after parameter retuning based on LHC Run-I data, more cons…