arXiv - PHYS - High Energy Physics - Phenomenology最新文献_第6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

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":null,"pages":null},"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":null,"pages":null},"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

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

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

Towards NNLO QCD corrections to Higgs boson pair production 走向 NNLO QCD 对希格斯玻色子成对产生的修正

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07573

Matthias Steinhauser

引用次数: 0

Anomalous Ionization in the Central Molecular Zone by sub-GeV Dark Matter 亚GeV暗物质在中央分子区的反常电离作用

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07515

Pedro De la Torre Luque, Shyam Balaji, Joseph Silk

引用次数: 0

Finite Energy Resolution, Correlations Between Bins and Non-Nested Hypotheses 有限能量分辨率、箱间相关性和非嵌套假设

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07157

Emilio Ciuffoli, Jarah Evslin

{"title":"Finite Energy Resolution, Correlations Between Bins and Non-Nested Hypotheses","authors":"Emilio Ciuffoli, Jarah Evslin","doi":"arxiv-2409.07157","DOIUrl":"https://doi.org/arxiv-2409.07157","url":null,"abstract":"We show that whenever independent events are binned, there is no correlation\u0000between bins. In particular, neither the uncertainty in the energy resolution\u0000nor a systematic error in the energy response of a detector will lead to a\u0000correlation between bins. This is in contrast with a result that recently\u0000appeared in the literature, where it was claimed that the finite energy\u0000resolution could induce correlation between bins, changing the distribution of\u0000$Deltachi^2$ when attempting to determine the neutrino mass ordering using\u0000reactor neutrinos. We will compute the expression for the variance of\u0000$Deltachi^2$ in the case of non-nested hypotheses if correlations between\u0000bins are present, showing that they could indeed affect the distribution. We\u0000will also show, however, that the detector response cannot introduce\u0000statistical correlations between bins unless these are already present in the\u0000original spectrum. Both of these results are valid in general: the absence of\u0000correlation is true for any detector response and the distribution of\u0000$Deltachi^2$ in the presence of (intrinsic) correlations, while obtained\u0000having the mass ordering in mind, it is true for any non-nested hypotheses.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178504","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

Possibility of the experimental study on semi-leptonic and non-leptonic $D^*_{(s)}$ weak decays 对半轻子和非轻子 $D^*_{(s)}$ 弱衰变进行实验研究的可能性

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07302

Hao Yang, Zhi-Qing Zhang, Peng Li, You-Ya Yang

{"title":"Possibility of the experimental study on semi-leptonic and non-leptonic $D^*_{(s)}$ weak decays","authors":"Hao Yang, Zhi-Qing Zhang, Peng Li, You-Ya Yang","doi":"arxiv-2409.07302","DOIUrl":"https://doi.org/arxiv-2409.07302","url":null,"abstract":"Just like other heavy flavor mesons, the weak decays of $D^*_{(s)}$ mesons\u0000can also provide a platform to check the Standard Model (SM), explore new\u0000physics (NP) and understand the mechanisms of weak interactions. At present,\u0000the theoretical and experimental researches on $D^*_{(s)}$ mesons are\u0000relatively limited. In addition to the dominant electromagnetic decays, the\u0000$D^*_{(s)}$ weak decays should also be feasible to explore the $D^*_{(s)}$\u0000mesons. In this paper, we use the covariant light-front quark model (CLFQM) to\u0000study the branching ratios of the semi-leptonic decays $D^*_{(s)}to\u0000Pell^{+}nu_{ell}$ and the non-leptonic decays $D^*_{(s)}to PP, PV$ with\u0000$P=pi, K, eta^{(prime)}, V=rho, K^*, phi$ and $ell=e, mu$, which are\u0000within the range $10^{-13}sim 10^{-6}$. Among these decays, the channels\u0000$D_{s}^{*+}toeta ell^{+}nu_{ell}$ and $D^{*+}_{s}to etarho^{+}$ possess\u0000the largest branching ratios, which can reach up to $10^{-6}$ order. These\u0000decays are most likely to be accessible at the future high-luminosity\u0000experiments. One can find that the branching ratios\u0000$mathcal{B}r(D_{s}^{*+}toeta ell^{+}nu_{ell})=1.46times10^{-6}$ and\u0000$mathcal{B}r(D_{s}^{*+}toeta rho^{+})=1.04times10^{-6}$ correspond to tens\u0000of thousands of events in the $e^+e^-$ collider experiments, such as the STCF,\u0000CEPC and FCC-ee, and tens of millions of events at the HL-LHC. In a word, it is\u0000feasible to study the $D^*_{(s)}$ meson weak decays in the future experiments.\u0000Furthermore, we also predict and discuss another two physical observations,\u0000that is, the longitudinal polarization fraction $f_{L}$ and the\u0000forward-backward asymmetry $A_{FB}$, for our considered decays.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223501","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

CP violation at finite temperature 有限温度下的 CP 违约

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI: arxiv-2409.07180

Károly Seller, Zsolt Szép, Zoltán Trócsányi

引用次数: 0