Nuclear and Particle Physics Proceedings最新文献

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Non-prompt Λc+ production measurement using machine learning methods in p–Pb collisions at sNN = 5.02 TeV with ALICE 在 sNN = 5.02 TeV 的 p-Pb 对撞中使用机器学习方法测量非突发性Λc+生成量的 ALICE

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-13 DOI: 10.1016/j.nuclphysbps.2024.06.018

Pengzhong Lu, ALICE collaboration

引用次数: 0

Ternary fission of various Z=120 isotopes with 3H, 4He and 8Be as light charge particle 以 3H、4He 和 8Be 为轻荷粒子的各种 Z=120 同位素的三元裂变

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-09 DOI: 10.1016/j.nuclphysbps.2024.07.001

Amaya Pavithran , N.P. Saeed Abdulla , M.K. Preethi-Rajan , R.K. Biju

The spontaneous cold ternary fission of various Z = 120 isotopes accompanied by light charge particles (LCP's)³H, ⁴He and ⁸Be in equatorial configuration is investigated using Unified ternary fission model (UTFM). The favourable ternary fission channel is predicted based on the computation of Q value, driving potential, barrier penetrability and relative yield of all potential ternary fragment configurations. For the parent isotopes ^302,306,308,120 with LCP ³H, the maximum relative yield is for the combinations that have one fragment respectively as ^131,132I and ¹³⁹Ba, which are nearly magic. However, in the case of³¹⁰120 with LCP ³H, the combination ¹⁴⁵La+¹⁶²Sm+³H exhibits the maximum relative yield. For the ⁴He accompanied fission of ^{302,306,308,310,}120 isotopes, the fragmentation that include ¹³⁹Cs, ^140,144Ba and ¹³¹Te isotopes, which is in the vicinity of shell closure possess high relative yield. In the case of⁸Be accompanied ternary breakup of the parent isotopes ^302,306,120, the maximum yield is due to the magic neutron shell and near-magic proton shell of ¹³⁴Te. Whereas, for parent isotopes ^308,310,120, it is due to the presence of respective doubly magic ¹³²Sn and near doubly magic ¹³¹Sn as one fragment. Therefore, our findings emphasize the prominent role of both high Q value as well as existence of doubly and near doubly magic nuclei in the ternary fission of super heavy even-even isotopes ^{302,306–310,}120, accompanied by light charge particles ³H, ⁴He and ⁸Be.

利用统一三元裂变模型（UTFM）研究了各种 Z = 120 同位素在赤道构型中伴随轻电荷粒子（LCP）3H、4He 和 8Be 的自发冷三元裂变。根据对所有潜在三元碎片构型的 Q 值、驱动势能、势垒穿透性和相对产率的计算，预测了有利的三元裂变通道。对于具有 LCP 3H 的母同位素 302、306、308、120，最大相对产率是分别有一个碎片的组合，即 131、132I 和 139Ba，它们几乎是神奇的。然而，在含有 LCP 3H 的 310120 中，145La+162Sm+3H 组合的相对产率最大。对于 302、306、308、310 和 120 同位素的 4He 伴随裂变，包括 139Cs、140、144Ba 和 131Te 同位素在内的碎片在壳闭附近具有较高的相对产率。在 8Be 伴随母同位素 302、306、120 的三元分裂中，134Te 的神奇中子壳和近乎神奇的质子壳产生了最大产率。而对于母同位素 308、310、120，则是由于各自的双魔态 132Sn 和近双魔态 131Sn 作为一个碎片存在。因此，我们的研究结果强调了在超重偶偶同位素 302、306-310、120 与轻电荷粒子 3H、4He 和 8Be 的三元裂变中，高 Q 值以及双魔幻核和近双魔幻核的存在所起的重要作用。

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引用次数: 0

Theoretical motivations for hidden light bosons 隐藏光玻色子的理论动机

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-08 DOI: 10.1016/j.nuclphysbps.2024.06.010

Luca Visinelli

引用次数: 0

Ωc0 two-body hadronic decays at LHCb 大型强子对撞机b上的Ωc0双体强子衰变

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-08 DOI: 10.1016/j.nuclphysbps.2024.06.008

Chuangxin Lin, LHCb collaboration

引用次数: 0

Open heavy-flavour production and transport properties with ALICE at the LHC 在大型强子对撞机上利用 ALICE 实现开放式重味产生和传输特性

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-05 DOI: 10.1016/j.nuclphysbps.2024.06.006

Xinye Peng, ALICE collaboration

引用次数: 0

Search for Higgs boson pair production with one associated vector boson in proton-proton collisions at S=13TeV with the CMS experiment 利用 CMS 实验在 S=13TeV 质子-质子对撞中搜索希格斯玻色子与一个相关矢量玻色子的成对产生

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-05 DOI: 10.1016/j.nuclphysbps.2024.06.013

Z. Licheng, X. Sun

引用次数: 0

Development of the muon entrance trigger system for the PSI muEDM experiment 为 PSI muEDM 实验开发μ介子入口触发系统

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-02 DOI: 10.1016/j.nuclphysbps.2024.06.007

Tianqi Hu, muEDM collaboration

引用次数: 0

Studies of new Higgs boson interactions through nonresonant HH production in the bb¯γγ final state in pp collisions at s = 13 TeV with the ATLAS detector 利用 ATLAS 探测器在 s = 13 TeV 的 pp 对撞中通过 bb¯γγ 最终态中的非共振 HH 产生对新希格斯玻色子相互作用的研究

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-07-02 DOI: 10.1016/j.nuclphysbps.2024.06.005

Zihang Jia, ATLAS collaboration

引用次数: 0

Theoretical overview on heavy flavor physics at LHCb 大型强子对撞机的重味道物理学理论概述

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-06-28 DOI: 10.1016/j.nuclphysbps.2024.06.015

Yue-Long Shen

Precise prediction of the heavy hadrons decay amplitudes is of great importance in the determination of the parameters of KM matrix and searching for new physics signals beyond the standard model. Due to the high accuracy of the B meson decay constants, the structure dependent QED corrections should be taken into account for $B \to μ^{+} μ^{-}$ decays due to the power enhancement, but this effect is numerically negligible for $B \to τ^{+} τ^{-}$ . The radiative leptonic decays and double radiative decays are the best channels to determine the B meson distribution amplitudes, but one should systematically deal with the power corrections to reduce the uncertainty. The heavy-to-light form factors is one of the most important nonperturbative quantities, and an improved method to improve the theoretical accuracy is to fit the form factors using combined data from Lattice and light-cone sum rules which works well at large recoil region. The power suppressed weak annihilation contribution is phenomenologically important in the nonleptonic decays, and the previously neglected hard-collinear gluon exchange diagrams have the potential to cancel the endpoint singularity arising from the hard gluon exchange. Therefore, more endeavors need to be paid to this topic.

重强子衰变振幅的精确预测对于确定 KM 矩阵参数和寻找标准模型之外的新物理信号具有重要意义。由于 B 介子衰变常数的高精度，B→μ+μ- 衰变由于功率增强而产生的与结构相关的 QED 修正应该考虑在内，但这种影响对于 B→τ+τ- 在数值上可以忽略不计。辐射轻子衰变和双辐射衰变是确定 B 介子分布振幅的最佳渠道，但我们应该系统地处理功率修正以减少不确定性。重光形式因子是最重要的非微扰量之一，而提高理论精度的一种改进方法是利用格点和光锥和规则的综合数据来拟合形式因子，这在大反冲区效果很好。功率被抑制的弱湮灭贡献在非轻子衰变中具有重要的现象学意义，而之前被忽视的硬共线胶子交换图有可能抵消硬胶子交换产生的端点奇异性。因此，我们需要对这一课题付出更多的努力。

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引用次数: 0

Automated calculation of jet fragmentation at NLO in QCD QCD 中 NLO 喷射碎片的自动计算

Q4 Physics and Astronomy

Nuclear and Particle Physics Proceedings

Pub Date : 2024-06-25 DOI: 10.1016/j.nuclphysbps.2024.05.006

ChongYang Liu, Xiao-Min Shen, Bin Zhou, Jun Gao

引用次数: 0

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