arXiv - PHYS - High Energy Physics - Phenomenology最新文献_第8页

Exotic Hidden-heavy Hadrons and Where to Find Them 奇异的隐重强子及其发现地点

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08002

Eric Braaten, Roberto Bruschini

引用次数: 0

Transverse momentum and rapidity distributions of top quarks in pair and single top quark production within the non-commutative standard model at the LHC 在大型强子对撞机的非交换标准模型中对顶夸克和单顶夸克产生的顶夸克横动量和快速分布

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.07893

Mohamed El Arebi Gadja, Yazid Delenda, Lamine Khodja

{"title":"Transverse momentum and rapidity distributions of top quarks in pair and single top quark production within the non-commutative standard model at the LHC","authors":"Mohamed El Arebi Gadja, Yazid Delenda, Lamine Khodja","doi":"arxiv-2409.07893","DOIUrl":"https://doi.org/arxiv-2409.07893","url":null,"abstract":"This paper presents a comprehensive study of top quark phenomenology within\u0000the Non-Commutative Standard Model. We calculate non-commutative corrections to\u0000the squared amplitudes for top quark pair production, as well as for single top\u0000quark production via the $t$-channel and $tW$-channel, while noting that the\u0000$s$-channel remains unaffected by non-commutative geometry. Utilizing\u0000MadGraph5_aMC@NLO, we determine total cross-sections at various center-of-mass\u0000energies and examine differential distributions in transverse momentum and\u0000rapidity at leading order in both the strong coupling $alpha_S$ and the\u0000non-commutative parameter $Theta$. For single top production in the\u0000$t$-channel, a matching technique is employed to extend the validity of the\u0000distribution to low $p_t^{top}$ values through resummation. We also compare the\u0000non-commutative corrections with higher-order QCD corrections obtained at NLO\u0000using MCFM and at NNLO from existing literature. Our findings reveal\u0000significant deviations arising from non-commutative geometry at high energies,\u0000providing insights into potential new physics at energy scales accessible by\u0000current and future colliders.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-loop amplitudes for $mathcal{O}(α_s^2)$ corrections to $Wγγ$ production at the LHC 大型强子对撞机上$Wγγ$产生的$mathcal{O}(α_s^2)$修正的二重振幅

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08146

Simon Badger, Heribertus Bayu Hartanto, Zihao Wu, Yang Zhang, Simone Zoia

引用次数: 0

Muon anomalous magnetic moment and Right handed sterile neutrino 介子反常磁矩和右手不育中微子

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07184

Iman Motie, S. Mahmoudi, Mahdi Sadegh, Jafar Khodagholizadeh, Alain Blanchard, She-Sheng Xue

{"title":"Muon anomalous magnetic moment and Right handed sterile neutrino","authors":"Iman Motie, S. Mahmoudi, Mahdi Sadegh, Jafar Khodagholizadeh, Alain Blanchard, She-Sheng Xue","doi":"arxiv-2409.07184","DOIUrl":"https://doi.org/arxiv-2409.07184","url":null,"abstract":"The muon's magnetic moment is a fundamental quantity in particle physics and\u0000the deviation of its value from quantum electrodynamics (QED), motivates\u0000research beyond the standard models (SM). In this study, we utilize the\u0000effective coupling of right-handed sterile neutrinos with SM gauge bosons to\u0000calculate the muon anomalous magnetic moment ($boldsymbol{mu}$AMM) at\u0000one-loop level. The contribution of the sterile neutrino interactions on the\u0000$boldsymbol{mu}$AMM is calculated by considering the standard and\u0000non-standard neutrino interactions. Our results show that the standard sterile\u0000neutrino interactions give a negligible contribution to $Delta\u0000a_{boldsymbol{mu}}$ while the non-standard neutrino interactions can play a\u0000significant role in explaining the muon $(g-2)$ anomaly. In the context of the\u0000non-standard neutrino interaction, our calculation shows that a Dirac mass\u0000scale $M_D$ around $100,text{GeV}$ could explain the muon anomaly if the\u0000right handed sterile neutrino's coupling with SM particles is about\u0000$mathcal{G}_Rapprox 10^{-3}$. We have also plotted the allowed region of the\u0000model parameters that satisfy the experimental data on $Delta\u0000a_{{boldsymbol{mu}}}^{SN}$ and discuss the percentage of the\u0000${boldsymbol{mu}}$ anomaly compensation in terms of the coupling constant\u0000$mathcal{G}_R$.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cosmic-ray deuteron excess from a primary component 主成分的宇宙射线氘核过量

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07139

Xing-Jian Lv, Xiao-Jun Bi, Kun Fang, Peng-Fei Yin, Meng-Jie Zhao

{"title":"Cosmic-ray deuteron excess from a primary component","authors":"Xing-Jian Lv, Xiao-Jun Bi, Kun Fang, Peng-Fei Yin, Meng-Jie Zhao","doi":"arxiv-2409.07139","DOIUrl":"https://doi.org/arxiv-2409.07139","url":null,"abstract":"The recent AMS-02 measurements of cosmic-ray (CR) deuteron fluxes suggest the\u0000presence of primary deuterons in quantities far exceeding predictions from Big\u0000Bang nucleosynthesis. This poses a significant challenge to modern\u0000astrophysics, as no known processes can account for such large amounts of\u0000deuterons without violating existing constraints~cite{Epstein:1976hq}. In\u0000contrast, it is recently proposed that the AMS-02 measurements can be explained\u0000by a purely secondary origin when contributions from heavier nuclei are\u0000considered. In this study, we recalculate the secondary deuteron flux using\u0000production cross sections updated with the latest collider data. We find that\u0000some of the deuteron production cross sections are overestimated in the\u0000widely-used calculation tools for CR propagation, and a primary deuteron\u0000component is still necessary. We then propose a novel process for generating\u0000primary deuterons at CR sources through a fusion mechanism, which is naturally\u0000unique to deuterons. This model could explain the observed deuteron excess\u0000while maintaining consistency with other CR measurements.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"342 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grand Unification at the Cosmological Collider with Chemical Potential 宇宙对撞机上的大统一与化学势

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07524

Arushi Bodas, Edward Broadberry, Raman Sundrum

引用次数: 0

Experimental Summary of the Moriond 2024 conference -- Electroweak Interaction & Unified Theories 莫里恩德 2024 会议实验摘要 -- 弱电相互作用与统一理论

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07120

Barbara Clerbaux

引用次数: 0

How new physics affects primordial neutrinos decoupling: Direct Simulation Monte Carlo approach 新物理学如何影响原始中微子解耦：直接模拟蒙特卡洛方法

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07378

Maksym Ovchynnikov, Vsevolod Syvolap

{"title":"How new physics affects primordial neutrinos decoupling: Direct Simulation Monte Carlo approach","authors":"Maksym Ovchynnikov, Vsevolod Syvolap","doi":"arxiv-2409.07378","DOIUrl":"https://doi.org/arxiv-2409.07378","url":null,"abstract":"Cosmological observations from Big Bang Nucleosynthesis and the Cosmic\u0000Microwave Background (CMB) offer crucial insights into the Early Universe,\u0000enabling us to trace its evolution back to lifetimes as short as 0.01 seconds.\u0000Upcoming CMB spectrum measurements, such as those underway at the Simons\u0000Observatory, will achieve unprecedented precision, allowing for more accurate\u0000extraction of information about the properties of the primordial plasma and, in\u0000particular, primordial neutrinos. This provides an opportunity to test whether\u0000these properties align with the predictions of the standard cosmological model\u0000or indicate the presence of new physics that influenced the evolution of the\u0000MeV-temperature plasma. A key component in understanding how new physics may\u0000have affected primordial neutrinos is solving the neutrino Boltzmann equation.\u0000In this paper, we present a novel approach to solving this equation that offers\u0000model independence, transparency, and computational efficiency - features that\u0000current state-of-the-art methods lack. We demonstrate a proof-of-concept\u0000implementation and apply it to several toy scenarios, showcasing key aspects of\u0000the primordial plasma's evolution in the presence of new physics.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"102 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measuring the weak mixing angle at SBND 测量 SBND 的弱混合角

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07430

Gustavo F. S. Alves, Antonio P. Ferreira, Shirley Weishi Li, Pedro A. N. Machado, Yuber F. Perez-Gonzalez

引用次数: 0

Precision Calculations in B physics B 物理中的精密计算

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07572

Matthias Steinhauser

引用次数: 0