高能物理 - 实验

• 新提交
• 交叉列表
• 替换

查看 最近的 文章

显示 2025年08月08日， 星期五 新的列表

新提交 (展示 1 之 1 条目 )

[1] arXiv:2508.05058 [中文pdf, pdf, html, 其他]

标题： 质子-质子碰撞中熵和比热容的多重性依赖性 显示英文标题

标题： Multiplicity dependence of the entropy and heat capacity for pp collisions at LHC energies

C. E. Munguía López, D. Rosales Herrera, J. R. Alvarado García, A. Fernández Téllez, J. E. Ramírez

评论： 12页，10图。已接受发表于《墨西哥物理杂志》

主题： 高能物理 - 实验 (hep-ex) ; 高能物理 - 现象学 (hep-ph)

我们研究在LHC能量下质子-质子碰撞中带电粒子产生的横向动量谱的多重性依赖性。 为此，我们考虑由ALICE合作组定义的不同多重性估计器分类的实验数据集，并在非广延粒子产生框架内进行分析。 我们计算$p_T$谱的方差、峰度、香农熵和热容量，以研究在不同事件分类器下多重性和温度函数的硬化过程。 我们发现，香农熵和热容量对于前向-后向和中间快速度区域的触发表现出不同的响应。 我们强调，事件偏差的选择可能会在估计理论和现象学可观测量时引起不同的响应，这可能导致误导性的结论。 显示英文摘要

We investigate the multiplicity dependence of the transverse momentum spectrum of the charged particle production in pp collisions at LHC energies. To this end, we consider the experimental data sets classified with different multiplicity estimators, defined by the ALICE Collaboration, that are analyzed within the framework of nonextensive particle production. We compute the variance, kurtosis, Shannon entropy, and heat capacity of the $p_T$ spectrum to study the hardening process as a function of the multiplicity and temperature under the different event classifiers. We found that both the Shannon entropy and the heat capacity show different responses for the triggers at the forward-backward and midrapidity regions. We emphasize that the selection of event biases may induce different responses in estimating theoretical and phenomenological observables that could lead to misleading conclusions.

交叉提交 (展示 4 之 4 条目 )

[2] arXiv:2508.04766 (交叉列表自 hep-ph) [中文pdf, pdf, html, 其他]

标题： T与CP效应在DUNE和T2HK中 显示英文标题

标题： T versus CP effects in DUNE and T2HK

Sabya Sachi Chatterjee, Sudhanwa Patra, Thomas Schwetz, Kiran Sharma

评论： 24页，11个PDF图表和1个表格

主题： 高能物理 - 现象学 (hep-ph) ; 高能物理 - 实验 (hep-ex)

时间反演(T)对称性在中微子振荡中的破坏意味着在固定中微子能量下，跃迁概率中存在一个$L$-奇成分，其中$L$表示中微子源与探测器之间的距离。 在标准的三种味框架下，我们表明在DUNE和T2HK实验中确定的跃迁概率的组合可以建立$L$-奇成分的存在，从而提供到$4\sigma$显著性的T破坏敏感性。 最优的中微子能量窗口是从0.68到0.92 GeV，因此DUNE事件谱的低能部分覆盖第二个振荡最大值起着关键作用。 我们比较了仅使用中微子数据在此能量范围内对T破坏的敏感性，与传统的基于中微子与反中微子束数据比较的电荷宇称(CP)破坏搜索。 我们表明对于DUNE来说，仅以中微子模式运行是有利的，即寻找T破坏效应，而T2HK则更敏感于CP破坏，通过比较中微子与反中微子数据。 因此，这两个实验提供了互补的方法来确定PMNS混合矩阵中的复相位。 显示英文摘要

Time reversal (T) symmetry violations in neutrino oscillations imply the presence of an $L$-odd component in the transition probability at fixed neutrino energy, with $L$ denoting the distance between neutrino source and detector. Within the standard three-flavour framework, we show that the combination of the transition probabilities determined at the DUNE and T2HK experiments can establish the presence of an $L$-odd component, and therefore provide sensitivity to T violation, up to $4\sigma$ significance. The optimal neutrino energy window is from 0.68 to 0.92 GeV, and therefore a crucial role is played by the low-energy part of the DUNE event spectrum covering the second oscillation maximum. We compare the sensitivity to T violation based on this energy range using neutrino data only with the more traditional search for charge-parity (CP) violation based on the comparison of neutrino versus anti-neutrino beam data. We show that for DUNE it is advantageous to run in neutrino mode only, i.e., searching for T violating effects, whereas T2HK is more sensitive to CP violation, comparing neutrino and anti-neutrino data. Hence, the two experiments offer complementary methods to determine the complex phase in the PMNS mixing matrix.

[3] arXiv:2508.04896 (交叉列表自 hep-ph) [中文pdf, pdf, html, 其他]

标题： 迷你电荷粒子的MAPP外围探测器灵敏度 显示英文标题

标题： Minicharged Particle Sensitivity of the MAPP Outrigger Detector

Matti Kalliokoski, Vasiliki A. Mitsou, Marc de Montigny, Abhinab Mukhopadhyay, Pierre-Philippe A. Ouimet, James Pinfold, Ameir Shaa, Michael Staelens

评论： 11页，3张图。论文提交发表在欧洲物理杂志ST特刊上，标题为《MoEDAL-MAPP实验——LHC首次针对超出标准模型物理的专用搜索实验》

主题： 高能物理 - 现象学 (hep-ph) ; 高能物理 - 实验 (hep-ex)

我们详细研究了MAPP外围探测器（OD）在高亮度大型强子对撞机（HL-LHC）上对微型电荷粒子（mCPs）的投影背景自由灵敏度。作为MAPP实验的首次升级，MAPP OD是一个独立探测器，旨在提高对具有中等有效电荷的高质量mCPs的灵敏度。MAPP OD计划安装在MAPP-1探测器旁边的管道中，位于LHC的UA83展厅和束流线之间。考虑到通过Drell-Yan机制和各种介子衰变产生的mCP，结果表明，在95%置信度下，MAPP OD可以使实验的质量上限扩展到HL-LHC上约200 GeV的mCP质量。 显示英文摘要

We present a detailed study of the projected background-free sensitivity of the MAPP Outrigger Detector (OD) to minicharged particles (mCPs) at the High-Luminosity Large Hadron Collider (HL-LHC). As the first upgrade to the MAPP Experiment, the MAPP OD is a standalone detector designed to offer enhanced sensitivity to high-mass mCPs with intermediate effective charges. The MAPP OD is planned for installation in a duct adjacent to the MAPP-1 detector, located between the LHC's UA83 gallery and the beamline. Considering mCP production via the Drell-Yan mechanism and various meson decays, the results show that, at the 95% confidence level, the MAPP OD can extend the experiment's upper mass reach to mCP masses of approximately 200 GeV at the HL-LHC.

[4] arXiv:2508.05096 (交叉列表自 physics.ins-det) [中文pdf, pdf, html, 其他]

标题： 基于大面积Micromegas探测器的移动式高空间分辨率μ子成像仪 显示英文标题

标题： A mobile high spatial-resolution Muography hodoscope based on large-area Micromegas detectors

Yu Wang, Shubin Liu, Zhihang Yao, Yulin Liu, Zhiyong Zhang, Zhengyang He, Ziwen Pan, Changqing Feng

评论： 稿件已提交至《应用物理杂志》进行审阅

主题： 仪器与探测器 (physics.ins-det) ; 高能物理 - 实验 (hep-ex)

μ子层析成像是基于μ子在物质中的吸收的成像技术，该技术能够测量隐藏物体或结构的内部细节。 该技术依赖于精确测量宇宙射线μ子的轨迹，这反映了来自目标物体和开阔天空的入射μ子通量。 在本文中，我们报告了基于Micromegas探测器的高空间分辨率μ子探测仪的构建。 使用四层40cm{\times }40 cm Micromegas探测器、通道复用电路和多功能读出系统，设计并构建了一个可移动的μ子探测仪，命名为{\mu }STC-R400。 结果表明，通道复用电路可以正确解析击中位置，探测器的空间分辨率为约190{\mu }m。实验在正在建设中的地铁隧道以及靠近山的户外进行，展示了{\mu }STC-R400在实验室外保持高空间分辨率的能力及其在恶劣环境中的鲁棒性。 显示英文摘要

Muon radiography is an imaging technique based on muon absorption in matter that allows measurement of internal details in hidden objects or structures. This technique relies on measuring cosmic-ray muons tracks accurately, which reflects the incoming muon flux from both the target object and the open sky. In this paper, we report on the construction of a high spatial resolution muography hodoscope based on Micromegas detectors. Using four layers of 40cm {\times} 40 cm Micromegas detectors, channel multiplexing circuits, and the versatile readout system, a moveable muography hodoscope named {\mu}STC-R400 was designed and constructed. Results show that the channel multiplexing circuits can resolve hit positions correctly, and the spatial resolution of the detector is approximately 190 {\mu}m. Experiments were conducted at an under-construction subway tunnel and outdoors near a mountain, demonstrating the {\mu}STC-R400's ability to maintain high spatial resolution outside the laboratory and its robustness in harsh environments.

[5] arXiv:2508.05434 (交叉列表自 hep-ph) [中文pdf, pdf, html, 其他]

标题： QCD凝聚和从$e^+e^-$和$τ$衰变中的$α_s$ 显示英文标题

标题： QCD condensates and $α_s$ from $e^+e^-$ and $τ$-decays

Stephan Narison (LUPM-CNRS Montpellier-FR and iHEPMAD-Univ. Antananarivo-MG)

评论： TO_BE_TRANSLATED: Latex files 18 pages, 15 Figures, 5 Tables, Review Talk given at QCD25 (40th anniversary), 30th june-4th July 2025, Montpellier-FR. arXiv admin note: text overlap with arXiv:2501.08369, arXiv:2408.05732

主题： 高能物理 - 现象学 (hep-ph) ; 高能物理 - 实验 (hep-ex) ; 高能物理 - 格点 (hep-lat)

在本次演讲中，我回顾了在SVZ展开中通过拉普拉斯求和规则（LSR）与$\tau$类似矩的比值来确定QCD凝聚态和$\alpha_s$的过程，在$e^+e^-\to I=1$重子和$\tau\to \nu_\tau+$重子的轴矢（A）和V-A通道中进行了研究。原始论文[1-3]中的一些排版错误已被修正。 我们发现胶子凝聚的值与来自夸克态和一些其他求和规则的$\langle \alpha_s G^2\rangle=(6.35\pm 0.35)\times 10^{-2}$ GeV$^4$相符，但精度较低，而四夸克凝聚的因子化被约6倍地破坏：$\rho\langle\bar\psi\psi\rangle^2=(5.98\pm 0.64)\times 10^{-4}$ GeV$^6$，这证实了之前的发现。 从$e^+e^-$和$\tau$衰变的轴矢量通道中提取到维度D=20的QCD凝聚，我们没有发现其在欧几里得区域内的数值出现指数增长，从而排除了所谓二象性破坏（DV）在类时区域中的显著影响。 从$e^+e^-\to$重子和$\tau$衰变中得到的$\alpha_s(M_\tau)$的最优值彼此一致，并得出平均值：$\alpha_s(M_\tau)=0.3128(51)$[响应值0.3330(57)]$ \longrightarrow \alpha_s(M_Z) = 0.1176$[响应值0.1201]$(7)_{fit}(3)_{evol.}$对于固定顺序（FO）[响应值渐进改进（CI）] PT 级数，与PDG24 平均值（不包括格点计算）进行比较：$ \alpha_s(M_Z) = 0.1175(10)$。 显示英文摘要

In this talk, I review the determinations of the QCD condensates and $\alpha_s$ within the SVZ expansion using the ratio of Laplace sum rule (LSR) and $\tau$-like moments in $e^+e^-\to I=1$ Hadrons and in $\tau\to \nu_\tau+$Hadrons Axial-vector (A) and V-A channels. Some misprints in the original papers [1-3] have been corrected. We found that the value of the gluon condensate agrees with the one $\langle \alpha_s G^2\rangle=(6.35\pm 0.35)\times 10^{-2}$ GeV$^4$ from quarkonia and some other sum rules but less accurate, while the factorization of the four-quark condensate is violated by a factor about 6: $\rho\langle\bar\psi\psi\rangle^2=(5.98\pm 0.64)\times 10^{-4}$ GeV$^6$ which confirms previous findings. Extracting the QCD condensates up to dimension D=20 from $e^+e^-$ and the axial-vector channel of $\tau$-decay, we do not find any exponential growth of their values in the Euclidian region, thus excluding (by duality) any significant effect of the so-called Duality Violation (DV) in the Time-like one. The optimal values of $\alpha_s(M_\tau)$ from $e^+e^-\to$ Hadrons and $\tau$-decays agree each others and lead to the average: $\alpha_s(M_\tau)=0.3128(51)$ [resp.0.3330(57)] $ \longrightarrow \alpha_s(M_Z) = 0.1176$ [resp. 0.1201] $(7)_{fit}(3)_{evol.}$ for Fixed Order (FO) [resp. Contour improved (CI)] PT series to be compared with the PDG24 average (without Lattice calculations): $ \alpha_s(M_Z) = 0.1175(10)$.

替换提交 (展示 7 之 7 条目 )

[6] arXiv:2403.03156 (替换) [中文pdf, pdf, html, 其他]

标题： 快速随机匹配追踪用于中微子和暗物质实验 显示英文标题

标题： The Fast Stochastic Matching Pursuit for Neutrino and Dark Matter Experiments

Yuyi Wang, Aiqiang Zhang, Yiyang Wu, Benda Xu, Xuewei Liu, Jiajie Chen, Zhe Wang, Shaomin Chen

主题： 高能物理 - 实验 (hep-ex) ; 数据分析、统计与概率 (physics.data-an) ; 仪器与探测器 (physics.ins-det)

光电倍增管（PMTs）被广泛应用于中微子和暗物质实验中进行光子计数。 当多个光子连续击中PMT时，它们的光电（PE）脉冲会叠加，从而妨碍对计数和时间的精确测量。 我们引入了快速随机匹配追踪（FSMP），通过可逆跳跃马尔可夫链蒙特卡罗策略，将PMT信号波形分析为单独的PE。 我们证明FSMP提高了基于PMT的实验的能量和时间分辨率，并在GPU上实现了加速。 它适用于dynode PMTs，并可扩展到微通道板（MCP）PMTs。 在我们对8英寸MCP-PMTs的实验室表征条件下，FSMP相比传统的波形积分方法，能量分辨率最高可提高10%。 显示英文摘要

Photomultiplier tubes (PMTs) are widely deployed at neutrino and dark matter experiments for photon counting. When multiple photons hit a PMT consecutively, their photo-electron (PE) pulses pile up to hinder the precise measurements of the count and timings. We introduce Fast Stochastic Matching Pursuit (FSMP) to analyze the PMT signal waveforms into individual PEs with the strategy of reversible-jump Markov-chain Monte Carlo. We demonstrate that FSMP improves the energy and time resolution of PMT-based experiments and gains acceleration on GPUs. It is suitable for dynode PMTs, and is extensible to microchannel-plate (MCP) PMTs. In the condition of our laboratory characterization of 8-inch MCP-PMTs, FSMP improves the energy resolution by up to 10% from the conventional method of waveform integration.

[7] arXiv:2504.08652 (替换) [中文pdf, pdf, html, 其他]

标题： 使用多光传感器增强水切连科夫空气簇射阵列中的中微子重建 显示英文标题

标题： Enhancing Neutrino Reconstruction in Water-Cherenkov Air Shower Arrays Using Multi-Photosensors

J. Alvarez-Muñiz, R. Colalillo, R. Conceição, B.S. González, V.M. Grieco, F. Guarino, M. Pimenta, B. Tomé, M. Waqas

评论： 11页，7图

主题： 高能物理 - 实验 (hep-ex) ; 高能天体物理现象 (astro-ph.HE)

在本文中，展示了配备多光电倍增管模块的水切连科夫探测器在无背景向上中微子探测和改进方向重建方面的潜力。 通过使用基于变压器的模型分析信号时间痕迹，与之前使用较大光电倍增管的设计相比，角度分辨率得到了显著提高。 这些探测器能够对高信号事件进行中微子方向重建，方位角分辨率为大约$10^\circ$，天顶角分辨率为大约$7^\circ$，对应的总体张角约为$10^\circ$。 这种设计减少了饱和效应并提高了方向灵敏度，特别是对于高能中微子。 结果突显了WCD阵列作为中微子天文学的补充工具的潜力，特别是在瞬态天体物理源的多信使观测背景下。 这些探测器几乎连续的运行和宽广的视场进一步增强了它们在实时监测和警报生成中的适用性。 显示英文摘要

In this article, the potential of water Cherenkov detectors equipped with multi-PMT modules for background-free upward-going neutrino detection and improved direction reconstruction is demonstrated. By analyzing signal time traces with transformer-based models, significant improvements in angular resolution are achieved compared to previous designs with larger PMTs. These detectors enable the reconstruction of neutrino directions with resolutions of approximately $10^\circ$ in azimuth and $7^\circ$ in zenith for high-signal events, corresponding to an overall opening angle of approximately $10^\circ$. This design reduces saturation effects and enhances directional sensitivity, particularly for high-energy neutrinos. The results highlight the potential of WCD arrays as complementary tools for neutrino astronomy, particularly in the context of multimessenger observations of transient astrophysical sources. The nearly continuous operation and wide field of view of these detectors further enhance their suitability for real-time monitoring and alert generation.

[8] arXiv:2506.14365 (替换) [中文pdf, pdf, html, 其他]

标题： 科学计算中心的排放生命周期分析 显示英文标题

标题： Life Cycle Analysis for Emissions of Scientific Computing Centres

Wim Vanderbauwhede, Mattias Wadenstein

评论： 修订版，回应评审意见

主题： 高能物理 - 实验 (hep-ex)

我们提出一个专用模型，以协助科学计算中心的排放生命周期分析。 该模型考虑了隐含碳排放和使用过程中的排放，以及其他因素，如数据中心电源使用效率、数据中心扩展、硬件更换、下一代硬件能效提高、电力供应碳强度降低以及热量再利用的潜力。 它在处理硬件隐含碳排放以及影响排放的各种因素的时间依赖性方面与现有模型有所不同。 我们展示了多个场景，将该模型应用于不同国家的实际高性能计算中心，以说明权衡关系如何依赖于各种因素，并将我们的模型与文献进行验证。 显示英文摘要

We propose a dedicated model to assist with the life cycle analysis of emissions of scientific computing centres. The model takes into account both the embodied carbon and emissions from use, as well as other factors such as data centre power usage efficiency, data centre expansion, hardware replacement, increase in energy efficiency of next-generation hardware, reduction in carbon intensity of the electricity supply and potential for heat reuse. If differs from existing models in its detailed handling of hardware embodied carbon and time dependency of various factors affecting the emissions. We present a number of scenarios where we apply the model to real-life HPC centres in different countries to illustrate how the trade-offs depend on the various factors and validate our model against the literature.

[9] arXiv:2507.11368 (替换) [中文pdf, pdf, html, 其他]

标题： 2025 SNOLAB未来项目研讨会社区报告 显示英文标题

标题： Community Report from the 2025 SNOLAB Future Projects Workshop

M. D. Diamond, P. Abbamonte, A. Arvanitaki, D. M. Asner, D. Balut, D. Baxter, C. Blanco, D. Boreham, M. Boulay, B. Broerman, T. Brunner, E. Caden, A. Chavarria, M. Chen, J. P. Davis, A. Drlica-Wagner, J. Estrada, N. Fatemighomi, J. Foster, D. Freedman, C. Gao, J. Hall, S. Hall, W. Halperin, M. Hirschel, N. Hoch, Z. Hong, A. Ianni, C. Jillings, D. Johnson, Y. Kahn, C. B. Krauss, T. Laframboise, M. Lai, M. R. Lapointe, B. Lillard, W.H. Lippincott, H. Ma, E. Marrufo Villalpando, K. Mistry, M. Nguyen, J. Oh, A. Radick, H. Reaume, B. Roach, J. Schütte-Engel, S. Scorza, J. W. Scott, S. J. Sekula, D. Sinclair, C. Thome, L. Thompson, J. Tiffenberg, K. J. Vetter, A. Williams, L. A. Winslow, M. Wurm

评论： 83页，15图

主题： 高能物理 - 实验 (hep-ex) ; 仪器与探测器 (physics.ins-det)

SNOLAB定期举办每两年一次的未来项目研讨会（FPW），旨在鼓励未来的项目利益相关者提出想法、概念和需求，这些实验或计划可能有一天会在SNOLAB举办。 2025年的FPW是在加拿大创新基金会要求的15年规划工作中举行的。 本报告收集了来自社区的输入，包括对研讨会的贡献以及未能在研讨会上安排但对社区仍然重要的贡献。 显示英文摘要

SNOLAB hosts a biannual Future Projects Workshop (FPW) with the goal of encouraging future project stakeholders to present ideas, concepts, and needs for experiments or programs that could one day be hosted at SNOLAB. The 2025 FPW was held in the larger context of a 15-year planning exercise requested by the Canada Foundation for Innovation. This report collects input from the community, including both contributions to the workshop and contributions that could not be scheduled in the workshop but nonetheless are important to the community.

[10] arXiv:2302.11584 (替换) [中文pdf, pdf, html, 其他]

标题： 第三家族夸克轻子统一与电弱精密测试 显示英文标题

标题： Third-Family Quark-Lepton Unification and Electroweak Precision Tests

Lukas Allwicher, Gino Isidori, Javier M. Lizana, Nudzeim Selimovic, Ben A. Stefanek

评论： 16页+附录，5张图，发表于JHEP的版本

期刊参考： JHEP 05 (2023), 179

主题： 高能物理 - 现象学 (hep-ph) ; 高能物理 - 实验 (hep-ex)

我们分析了在TeV尺度下第三族夸克-轻子统一假设与电弱精确数据、轻子味普遍性测试以及高能$p_T$约束的兼容性。 我们在UV完备的风味非统一4321规范模型框架内进行研究，该模型在单环级别与标准模型有效场理论相匹配。 为了保持一致性，所有电弱精确可观测量也在有效场理论中以单环级别进行计算。 在树图层次，最大的修正来自于$W\rightarrow \tau\nu_\tau$和$Z \to \nu_\tau \nu_\tau$，这是由于模型为中微子质量生成所需的伪狄拉克单态费米子被积分出去所致。 在环图层次，模型中的新色荷态通过主导对数和次主导对数运行效应，对电弱精确可观测量产生大的风味普遍贡献，从而显著改善了电弱拟合（包括$W$-玻色子质量的增加）。 如果该模型解决了带电流$B$-介子异常，则这些效应无法解耦。 总体而言，我们发现数据集之间具有良好的兼容性，同时满足所有低能和高能约束。 显示英文摘要

We analyze the compatibility of the hypothesis of third-family quark-lepton unification at the TeV scale with electroweak precision data, lepton flavor universality tests, and high-$p_T$ constraints. We work within the framework of the UV complete flavor non-universal 4321 gauge model, which is matched at one loop to the Standard Model Effective Field Theory. For consistency, all electroweak precision observables are also computed at one loop within the effective field theory. At tree level, the most sizeable corrections are to $W\rightarrow \tau\nu_\tau$ and $Z \to \nu_\tau \nu_\tau$ due to integrating out a pseudo-Dirac singlet fermion required by the model for neutrino mass generation. At loop level, the new colored states of the model generate large flavor-universal contributions to the electroweak precision observables via leading- and next-to-leading log running effects, yielding a significant improvement in the electroweak fit (including an increase in the $W$-boson mass). These effects cannot be decoupled if the model addresses the charged-current $B$-meson anomalies. Overall, we find good compatibility between the data sets, while simultaneously satisfying all low- and high-energy constraints.

[11] arXiv:2504.16983 (替换) [中文pdf, pdf, html, 其他]

标题： 重子数破坏：从核矩阵元到超出标准模型的物理 显示英文标题

标题： Baryon Number Violation: From Nuclear Matrix Elements to BSM Physics

Leah J. Broussard, Andreas Crivellin, Martin Hoferichter, Sergey Syritsyn, Yasumichi Aoki, Joshua L. Barrow, Arnau Bas i Beneito, Zurab Berezhiani, Nicola Fulvio Calabria, Svjetlana Fajfer, Susan Gardner, Julian Heeck, Cailian Jiang, Luca Naterop, Alexey A. Petrov, Robert Shrock, Adrian Thompson, Ubirajara van Kolck, Michael L. Wagman, Linyan Wan, John Womersley, Jun-Sik Yoo

评论： 42页，INT研讨会“INT-25-91W：重子数破坏：从核矩阵元到超出标准模型的物理”摘要；期刊版本

期刊参考： J. 物理。G 52 (2025) 083001

主题： 高能物理 - 现象学 (hep-ph) ; 高能物理 - 实验 (hep-ex) ; 高能物理 - 格点 (hep-lat) ; 核实验 (nucl-ex) ; 核理论 (nucl-th)

违反重子数的过程，尤其是质子衰变和$n\bar n$转换，是探索标准模型之外的物理（BSM）的有希望的探针，以理解宇宙中缺乏反物质的现象。 为了解释当前和未来的实验限制，需要从核矩阵元到紫外线完备模型的理论输入。 因此，需要实验、有效场论、格点QCD和BSM模型构建之间的相互作用，以制定策略，从当前和未来数据中准确提取信息，并最大化下一代实验的影响和灵敏度。 在这里，我们简要总结了研讨会"INT-25-91W：重子数破坏：从核矩阵元到BSM物理"的主要结果和讨论，该研讨会于2025年1月13日至17日在华盛顿大学核理论研究所，华盛顿州西雅图举行。 显示英文摘要

Processes that violate baryon number, most notably proton decay and $n\bar n$ transitions, are promising probes of physics beyond the Standard Model (BSM) needed to understand the lack of antimatter in the Universe. To interpret current and forthcoming experimental limits, theory input from nuclear matrix elements to UV complete models enters. Thus, an interplay of experiment, effective field theory, lattice QCD, and BSM model building is required to develop strategies to accurately extract information from current and future data and maximize the impact and sensitivity of next-generation experiments. Here, we briefly summarize the main results and discussions from the workshop "INT-25-91W: Baryon Number Violation: From Nuclear Matrix Elements to BSM Physics," held at the Institute for Nuclear Theory, University of Washington, Seattle, WA, January 13-17, 2025.

[12] arXiv:2507.23092 (替换) [中文pdf, pdf, html, 其他]

标题： 研究利用HERA数据的深度非弹性散射中的双光子交换 显示英文标题

标题： Studying Two-Photon Exchange in Deep Inelastic Scattering with the HERA Data

Henry T. Klest

评论： 欢迎发表评论！

主题： 高能物理 - 现象学 (hep-ph) ; 高能物理 - 实验 (hep-ex) ; 核实验 (nucl-ex)

双光子交换（TPE）是解释质子电磁形式因子测量差异的主要原因之一。 人们提出TPE不仅可能影响弹性散射，还可能影响包括深度非弹性散射（DIS）和半包括DIS的截面，从而影响基于部分子分布的DIS结构函数的解释。 预计更高阶的QED效应，如TPE，应在\epp 和\emp DIS截面比值中表现出与1的偏差。 我们使用来自HERA和SLAC的现有包括$e^{\pm}p$DIS数据来限制包括DIS中的更高阶QED效应。 显示英文摘要

Two-photon exchange (TPE) is one of the leading explanations for discrepancies in measurements of the proton electromagnetic form factors. It has been proposed that TPE could impact not only elastic scattering, but also the cross sections for both inclusive deep inelastic scattering (DIS) and semi-inclusive DIS, thereby affecting the interpretation of DIS structure functions in terms of parton distributions. It is expected that higher-order QED effects such as TPE should manifest as a deviation from unity in the ratio of \epp and \emp DIS cross sections. We use the existing inclusive $e^{\pm}p$ DIS data from HERA and SLAC to constrain higher-order QED effects on inclusive DIS.