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A Three-Coupled-Channel Analysis of $Z_c(3900)$ Involving $Dbar{D}^*$, $πJ/ψ$, and $ρη_c $ 涉及 $Dbar{D}^*$、$πJ/ψ$ 和 $ρη_c $ 的 $Z_c(3900)$ 的三耦合通道分析
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.10865
Kang Yu, Guang-Juan Wang, Jia-Jun Wu, Zhi Yang
{"title":"A Three-Coupled-Channel Analysis of $Z_c(3900)$ Involving $Dbar{D}^*$, $πJ/ψ$, and $ρη_c $","authors":"Kang Yu, Guang-Juan Wang, Jia-Jun Wu, Zhi Yang","doi":"arxiv-2409.10865","DOIUrl":"https://doi.org/arxiv-2409.10865","url":null,"abstract":"In this work, we conduct a three-coupled-channel analysis of the $Z_c(3900)$\u0000structure, focusing on the $Dbar{D}^*$, $J/psi pi$, and $rho eta_c$\u0000channels, based on the one-boson exchange model. Drawing from previous study on\u0000the exotic state $T_{cc}$, we only utilize one more parameter to construct the\u0000interactions between the channels. Our model successfully reproduces the\u0000experimental line shapes of the invariant mass distribution at $sqrt{s} =\u00004.23$ and $4.26$ GeV for the three channels. Additionally, the finite-volume\u0000energy levels in our model show agreement with current LQCD conclusion.\u0000Detailed analysis suggests that the $Z_c(3900)$ peaks in the $pi J/psi$ and\u0000$rho eta_c$ distributions primarily arise from the triangle loop involving\u0000the $D_1 bar{D} D^*$ intermediate system. In the $Dbar{D}^*$ distribution,\u0000the threshold peak is generated by the cascade decay mechanism enhanced by a\u0000triangle diagram. Moreover, we find a virtual pole located far from the\u0000threshold, indicating that $Z_c(3900)$ peaks are not associated with physical\u0000pole. We conclude that the $Z_c(3900)$ peaks are predominantly caused by the\u0000threshold cusp.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258810","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
History of a Particle Bounded to the Cosmological LTB Black Hole Surrounded by the Quintom Field 被昆托姆场包围的宇宙学 LTB 黑洞边界粒子的历史
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11318
Sareh Eslamzadeh, Saheb Soroushfar
{"title":"History of a Particle Bounded to the Cosmological LTB Black Hole Surrounded by the Quintom Field","authors":"Sareh Eslamzadeh, Saheb Soroushfar","doi":"arxiv-2409.11318","DOIUrl":"https://doi.org/arxiv-2409.11318","url":null,"abstract":"This paper provides a complete set of analytic time-varying geodesic\u0000equations of the LTB black hole surrounded by the Quintom field. Indeed, we\u0000probe the evolution of the effective potential of such a black hole and\u0000possible photon orbits on cosmic epochs. We deduce that passing time in the\u0000accelerated universe from the early to late time epochs causes the peak of\u0000effective potential to decrease and shift to small radii, while the possibility\u0000of forming a stable orbit increases. Besides, four situations including:\u0000terminating bound orbit, stable orbit, scattering flyby orbit, and terminating\u0000escape orbit have been illustrated in some cosmic time slices. Moreover,\u0000changing orbits with time from the early universe to the late time epochs have\u0000been investigated. Furthermore, the stability of orbits and ISCO have been\u0000analyzed.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"188 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258814","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
Pauli form factor contributions to the inelastic proton bremsstrahlung and dark photon production 保利形式因子对非弹性质子轫致辐射和暗光子产生的贡献
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11386
Dmitry Gorbunov, Ekaterina Kriukova
{"title":"Pauli form factor contributions to the inelastic proton bremsstrahlung and dark photon production","authors":"Dmitry Gorbunov, Ekaterina Kriukova","doi":"arxiv-2409.11386","DOIUrl":"https://doi.org/arxiv-2409.11386","url":null,"abstract":"We study the production of hypothetical vector particles, dark photons\u0000$gamma^prime$, with masses in the the range 0.4--1.8 GeV via inelastic proton\u0000bremsstrahlung. We further develop the approach of Refs. [1-3], where for the\u0000first time we considered the contributions to the cross section that are\u0000associated with the Pauli form factor in $ppgamma^prime$ vertex and obtained\u0000new splitting functions. We demonstrate numerically the importance of these\u0000corrections to full inelastic proton bremsstrahlung cross section and refine\u0000the sensitivity of the ongoing and future fixed target experiments T2K, DUNE\u0000and SHiP to the parameters of dark photon model. A dedicated experiment on\u0000measurements of the proton electromagnetic form factors in the time-like region\u0000below the proton-antiproton threshold, like those suggested in PANDA at FAIR,\u0000would help to obtain the robust predictions for the dark photon production by a\u0000proton beam at fixed target.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258818","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
The $e^+ e^- rightarrow Z H$ Process in the SMEFT Beyond Leading Order 超越前沿阶的 SMEFT 中的 $e^+ e^-rightarrow Z H$ 过程
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11466
Konstantin Asteriadis, Sally Dawson, Pier Paolo Giardino, Robert Szafron
{"title":"The $e^+ e^- rightarrow Z H$ Process in the SMEFT Beyond Leading Order","authors":"Konstantin Asteriadis, Sally Dawson, Pier Paolo Giardino, Robert Szafron","doi":"arxiv-2409.11466","DOIUrl":"https://doi.org/arxiv-2409.11466","url":null,"abstract":"We systematically study potential effects of Beyond the Standard Model\u0000physics in the $e^+ e^- rightarrow Z H$ process. To this end, we include all\u0000relevant dimension-6 Standard Model Effective Field Theory operators and work\u0000to next-to-leading order (NLO) accuracy in the electroweak coupling. We\u0000consider both polarized and unpolarized electron and positron beams and present\u0000results for $sqrt{s}=240, ~365$ and $500~{rm GeV}$, emphasizing contributions\u0000where the NLO predictions differ significantly from the leading order results.\u0000At NLO, a sensitivity arises to operators that do not contribute at tree level,\u0000such as the Higgs trilinear coupling, CP-violating operators, and dimension-6\u0000operators involving the top quark, among many others. We compare the prospects\u0000of future $e^+e^-$ colliders to explore these new physics effects with existing\u0000measurements from the LHC, electron EDMs (for CP violating operators), and Z\u0000pole measurements.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258750","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
Dark photon production via inelastic proton bremsstrahlung with Pauli form factor 通过具有保利形式因子的非弹性质子轫致辐射产生暗光子
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11089
Dmitry Gorbunov, Ekaterina Kriukova
{"title":"Dark photon production via inelastic proton bremsstrahlung with Pauli form factor","authors":"Dmitry Gorbunov, Ekaterina Kriukova","doi":"arxiv-2409.11089","DOIUrl":"https://doi.org/arxiv-2409.11089","url":null,"abstract":"We study the production of vector portal mediators, dark photons, with masses\u0000in the range 0.4--1.8,GeV in proton-proton collisions via the process of\u0000inelastic proton bremsstrahlung. In contrast to previous studies, we take into\u0000account the contribution of Pauli electromagnetic form factor to differential\u0000cross section and introduce two new splitting functions of the proton. We show\u0000that their contributions can become leading in the mass region 0.9--1.8,GeV\u0000and present the updated estimate for the sensitivity of the future SHiP\u0000experiment to visible decays of dark photons.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258809","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
Feasibility study of True Muonium discovery with CERN-SPS H4 positron beam 利用欧洲核子研究中心-空间站 H4 正电子束发现真钚的可行性研究
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11342
Ruben Gargiulo, Elisa Di Meco, Stefano Palmisano
{"title":"Feasibility study of True Muonium discovery with CERN-SPS H4 positron beam","authors":"Ruben Gargiulo, Elisa Di Meco, Stefano Palmisano","doi":"arxiv-2409.11342","DOIUrl":"https://doi.org/arxiv-2409.11342","url":null,"abstract":"True muonium ($mu^+mu^-$) is one of the heaviest and smallest\u0000electromagnetic bound states not containing hadrons, and has never been\u0000observed so far. %Unlike atoms containing $tau$ particles, the muon lifetime\u0000is long enough to allow observation of true muonium (TM) decays and\u0000transitions. In this work it is shown that the spin-1 TM state (ortho-TM) can\u0000be observed at a discovery level of significance in three months at the CERN\u0000SPS North-Area H4A beam line, using 43.7 GeV secondary positrons. In this way,\u0000by impinging the positrons on multiple thin low-Z targets, ortho-TM, which\u0000decays predominantly to $e^+e^-$, can be produced from $e^+e^- to TM$\u0000interaction on resonance ($sqrt{s} sim 2m_{mu}$).","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258813","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
Capability of Cosmic Gravitational Focusing on Identifying the Neutrino Mass Ordering 宇宙引力聚焦识别中微子质量排序的能力
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11115
Shao-Feng Ge, Liang Tan
{"title":"Capability of Cosmic Gravitational Focusing on Identifying the Neutrino Mass Ordering","authors":"Shao-Feng Ge, Liang Tan","doi":"arxiv-2409.11115","DOIUrl":"https://doi.org/arxiv-2409.11115","url":null,"abstract":"The cosmic gravitational focusing (CGF) of relic neutrinos can provide an\u0000independent measurement of the absolute neutrino masses $m_i$ with fourth-power\u0000dependence ($m^4_i$). We demonstrate in this paper for the first time how this\u0000can help identifying the neutrino mass ordering (NMO). Upon incorporating the\u0000projected CGF sensitivity at DESI, the preference for the normal ordering (NO)\u0000with a prior $sum m_nu > 0.509,{rm eV}$ would increase from the original\u000089.9% of the current clustering method with both DESI BAO and CMB to 98.2%\u0000while the inverted ordering (IO) is further disfavored from 10.1% to 1.8%. We\u0000also show how this can affect the prospects of the neutrinoless double beta\u0000decay and single beta decay measurements.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258868","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
Exploring the Key Features of Repeating Fast Radio Bursts with Machine Learning 利用机器学习探索重复快速无线电脉冲的关键特征
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11173
Wan-Peng Sun, Ji-Guo Zhang, Yichao Li, Wan-Ting Hou, Fu-Wen Zhang, Jing-Fei Zhang, Xin Zhang
{"title":"Exploring the Key Features of Repeating Fast Radio Bursts with Machine Learning","authors":"Wan-Peng Sun, Ji-Guo Zhang, Yichao Li, Wan-Ting Hou, Fu-Wen Zhang, Jing-Fei Zhang, Xin Zhang","doi":"arxiv-2409.11173","DOIUrl":"https://doi.org/arxiv-2409.11173","url":null,"abstract":"Fast radio bursts (FRBs) are enigmatic high-energy events with unknown\u0000origins, which are observationally divided into two categories, i.e., repeaters\u0000and non-repeaters. However, there are potentially a number of non-repeaters\u0000that may be misclassified, as repeating bursts are missed due to the limited\u0000sensitivity and observation periods, thus misleading the investigation of their\u0000physical properties. In this work, we propose a repeater identification method\u0000based on the t-distributed Stochastic Neighbor Embedding (t-SNE) algorithm and\u0000apply the classification to the first Canadian Hydrogen Intensity Mapping\u0000Experiment Fast Radio Burst (CHIME/FRB) catalog. We find that the spectral\u0000morphology parameters, specifically spectral running ($r$), represent the key\u0000features for identifying repeaters from the non-repeaters. Also, the results\u0000suggest that repeaters are more biased towards narrowband emission, whereas\u0000non-repeaters are inclined toward broadband emission. We provide a list of 163\u0000repeater candidates, with $5$ of which are confirmed with an updated repeater\u0000catalog from CHIME/FRB. Our findings help to the understanding of the various\u0000properties underlying repeaters and non-repeaters, as well as guidelines for\u0000future FRB detection and categorization.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258815","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
Searches for long-lived dark photons at proton accelerator experiments 在质子加速器实验中寻找长寿命暗光子
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.11096
Yehor Kyselov, Maksym Ovchynnikov
{"title":"Searches for long-lived dark photons at proton accelerator experiments","authors":"Yehor Kyselov, Maksym Ovchynnikov","doi":"arxiv-2409.11096","DOIUrl":"https://doi.org/arxiv-2409.11096","url":null,"abstract":"A systematic and unified study of the ability of lifetime frontier\u0000experiments to explore the parameter space of hypothetical long-lived particles\u0000is one of the main steps in defining their parameter space. Such an analysis\u0000has not been conducted for dark photons -- hypothetical massive particles that\u0000have kinetic mixing with Standard Model photons. Existing studies have varied\u0000in their assumptions about dark photon phenomenology, often using outdated\u0000models that do not reflect recent advancements. In this paper, we present a\u0000unified calculation of the parameter space for GeV-scale dark photons probed by\u0000lifetime frontier experiments, delineating the regions excluded by past\u0000experiments and those accessible to future experiments. Our approach\u0000incorporates the latest advances in studying dark photon production mechanisms,\u0000including proton bremsstrahlung and mixing with neutral mesons, and utilizes\u0000the full palette of hadronic decays. Additionally, we explore the impact of\u0000uncertainties in proton bremsstrahlung on the dark photon parameter space, and\u0000find that they may severely affect the reach of many past and future\u0000experiments, including the maximal probed mass. The results are provided in a\u0000publicly accessible format, specifically through the implementation of the\u0000updated phenomenological models in texttt{SensCalc} - a unified tool for\u0000calculating event rates of new physics particles at lifetime frontier\u0000experiments, that has been supplemented by the module texttt{EventCalc} that\u0000samples events similar to traditional Monte Carlo generators.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258808","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
Lepton seesaw model in a modular $A_4$ symmetry 模块$A_4$对称中的质子跷跷板模型
arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-17 DOI: arxiv-2409.10912
Takaaki Nomura, Hiroshi Okada
{"title":"Lepton seesaw model in a modular $A_4$ symmetry","authors":"Takaaki Nomura, Hiroshi Okada","doi":"arxiv-2409.10912","DOIUrl":"https://doi.org/arxiv-2409.10912","url":null,"abstract":"We propose a lepton seesaw model to get the same mass-origin of\u0000charged-leptons and neutrinos introducing a modular $A_4$ symmetry. In this\u0000scenario, the mass matrix of charged-leptons is induced via seesaw-like\u0000mechanism while the mass matrix of neutrino is realized via an inverse seesaw\u0000mechanism with help of vector-like fermions and an isospin singlet and triplet\u0000scalar field with nonzero vacuum expectation values. In analyzing the model we\u0000concentrate on fixed points of modulus $tau$ that is favored by a flux\u0000compactification of Type IIB string theory. We search for allowed region at\u0000nearby these fixed points and find good solutions at nearby $tau=omega$ with\u0000several good predictions.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258869","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
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