arXiv: High Energy Physics - Phenomenology最新文献_第10页

Chiral phase structure and critical end point in QCD QCD中的手性相结构和临界端点

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-26 DOI: 10.1016/j.physletb.2021.136584

F. Gao, J. Pawlowski

引用次数: 41

Sensitivities of future reactor and long-baseline neutrino experiments to NSI 未来反应堆和长基线中微子实验对NSI的敏感性

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-24 DOI: 10.1103/PHYSREVD.103.075003

P. Bakhti, M. Rajaee

引用次数: 8

Transverse structure of electron in momentum space in basis light-front quantization 基光前量子化中动量空间中电子的横向结构

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-23 DOI: 10.1103/PHYSREVD.103.036005

Zhi Hu, Siqi Xu, C. Mondal, Xingbo Zhao, J. Vary

引用次数: 8

O(αsv2) corrections to the hadronic decay of vector quarkonia 向量夸克子强子衰变的O(αsv2)修正

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-22 DOI: 10.1103/physrevd.102.094021

Wen-Long Sang, F. Feng, Yu Jia

{"title":"O(αsv2)\u0000 corrections to the hadronic decay of vector quarkonia","authors":"Wen-Long Sang, F. Feng, Yu Jia","doi":"10.1103/physrevd.102.094021","DOIUrl":"https://doi.org/10.1103/physrevd.102.094021","url":null,"abstract":"Within the nonrelativistic QCD (NRQCD) factorization framework, we compute the ${mathcal O}(alpha_s v^2)$ corrections to the hadronic decay rate of vector quarkonia, exemplified by $J/psi$ and $Upsilon$. Setting both the renormalization and NRQCD factorization scales to be $m_Q$, we obtain $Gamma(J/psito {rm LH})= 0.0716frac{alpha_s^3}{m_c^2} langle mathcal{O}_1({}^3S_1)rangle_{J/psi} [1-1.19alpha_s+(-5.32+3.03alpha_s)langle v^2rangle_{J/psi}]$ and $Gamma(Upsilonto {rm LH})= 0.0716frac{alpha_s^3}{m_b^2}langlemathcal{O}_1({}^3S_1)rangle_{Upsilon}[1-1.56alpha_s+(-5.32+4.61alpha_s)langle v^2rangle_{Upsilon}]$. We confirm the previous calculation of $mathcal{O}(alpha_s)$ corrections on a diagram-by-diagram basis, with the accuracy significantly improved. For $J/psi$ hadronic decay, we find that the ${mathcal O}(alpha_sv^2)$ corrections are moderate and positive, nevertheless unable to counterbalance the huge negative corrections. On the other hand, the effect of ${mathcal O}(alpha_sv^2)$ corrections for $Upsilon(nS)$ is sensitive to the $mathcal{O}(v^2)$ NRQCD matrix elements. With the appropriate choice of the NRQCD matrix elements, our theoretical predictions for the decay rates may be consistent with the experimental data for $Upsilon(1S,2S)to {rm LH}$. As a byproduct, we also present the theoretical predictions for the branching ratio of $J/psi(Upsilon)to 3gamma$ accurate up to $mathcal{O}(alpha_s v^2)$.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80615958","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: 2

Exploring the Universe with dark light scalars 用暗光标量探索宇宙

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-21 DOI: 10.1103/PHYSREVD.103.083528

Bugeon Jo, HyeonTae Kim, Hyungdo Kim, C. Shin

{"title":"Exploring the Universe with dark light scalars","authors":"Bugeon Jo, HyeonTae Kim, Hyungdo Kim, C. Shin","doi":"10.1103/PHYSREVD.103.083528","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.083528","url":null,"abstract":"We study the cosmology of a dark sector consisting of (ultra) light scalars. Since the scalar mass is radiatively unstable, a special explanation is required to make it much smaller than the UV scale. There are two well-known mechanisms for the origin of scalar mass. The scalar can be identified as a pseudo-Goldstone boson, whose shift symmetry is explicitly broken by non-perturbative corrections, like the axion. Alternatively, it can be identified as a composite particle like the glueball, whose mass is limited by the confinement scale of the theory. In both cases, the scalar can be naturally light, but interaction behavior is quite different. The lighter the axion (glueball) mass is, the weaker (stronger) the interaction strength is. We consider the dark axion whose shift symmetry is anomalously broken by the hidden non-abelian gauge symmetry. After the confinement of the gauge group, the dark axion and the dark glueball get masses and both form multicomponent dark matter. We carefully consider the effects of energy flow from the dark gluons to the dark axions and derive the full equations of motion for the background and the perturbed variables. The effect of the dark axion-dark gluon coupling on the evolution of the entropy and the isocurvature perturbations is also clarified. Finally, we discuss the gravo-thermal collapse of the glueball subcomponent dark matter after the halos form, in order to explore the potential to contribute to the formation of seeds for the supermassive black holes observed at high redshifts. With simplified assumptions, the glueball subcomponent dark matter with the mass of $sim 0.01-1{rm MeV}$, and the axion dark matter with the GUT scale decay constant (the mass of ${cal O}(10^{-18}),{rm eV}$) can provide the hint on the origin of the supermassive black holes at high redshifts.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85818198","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: 16

3-D structure of the Glasma initial state: Breaking boost-invariance by collisions of extended shock waves in classical Yang-Mills theory 等离子体初始态的三维结构:经典杨-米尔斯理论中扩展激波碰撞打破助推不变性

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-21 DOI: 10.1103/physrevd.103.014003

Soeren Schlichting, Pragya Singh

引用次数: 4

Effects of hadronic repulsive interactions on the fluctuations of conserved charges 强子斥力相互作用对守恒电荷波动的影响

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-21 DOI: 10.1103/PHYSREVD.103.054015

Somenath Pal, G. Kadam, H. Mishra, A. Bhattacharyya

引用次数: 2

The study of exotic state $$Z_c^{pm }(3900)$$ decaying to $$J/psi pi ^{pm }$$ in the pp collisions at $$sqrt{s}$$ = 1.96, 7, and 13 TeV 在$$sqrt{s}$$ = 1.96、7和13 TeV的pp碰撞中，奇异态$$Z_c^{pm }(3900)$$衰变成$$J/psi pi ^{pm }$$的研究

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-20 DOI: 10.1140/EPJC/S10052-021-08983-3

Zhen Zhang, Liang Zheng, Gang Chen, Hong-ge Xu, D. Zhou, Yu-Liang Yan, B. Sa

引用次数: 3

Signatures of α-clustering in O16 by using a multiphase transport model 基于多相输运模型的O16中α-聚类特征

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-20 DOI: 10.1103/PhysRevC.102.054907

Yi-An Li, Song Zhang, Yugang Ma

{"title":"Signatures of \u0000α\u0000-clustering in \u0000O16\u0000 by using a multiphase transport model","authors":"Yi-An Li, Song Zhang, Yugang Ma","doi":"10.1103/PhysRevC.102.054907","DOIUrl":"https://doi.org/10.1103/PhysRevC.102.054907","url":null,"abstract":"$alpha$-clustered structures in light nuclei could be studied through \"snapshots\" taken by relativistic heavy-ion collisions. A multiphase transport (AMPT) model is employed to simulate the initial structure of collision nuclei and the proceeding collisions at center of mass energy $sqrt{s_{NN}}$ = 6.37 TeV. This initial structure can finally be reflected in the subsequent observations, such as elliptic flow ($v_{2}$), triangular flow ($v_{3}$) and quadrangular flow ($v_4$). Three sets of the collision systems are chosen to illustrate system scan is a good way to identify the exotic $alpha$-clustered nuclear structure, case I: $mathrm{^{16}O}$ nucleus (with or without $alpha$-cluster) + ordinary nuclei (always in Woods-Saxon distribution) in most central collisions, case II: $mathrm{^{16}O}$ nucleus (with or without $alpha$-cluster) + $mathrm{^{197}Au}$ nucleus collisions for centrality dependence, and case III: symmetric collision systems (namely, $^{10}$B + $^{10}$B, $^{12}$C + $^{12}$C, $^{16}$O + $^{16}$O (with or without $alpha$-cluster), $^{20}$Ne + $^{20}$Ne, and $^{40}$Ca + $^{40}$Ca) in most central collisions. Our calculations propose that relativistic heavy-ion collision experiments at $sqrt{s_{NN}}$ = 6.37 TeV are promised to distinguish the tetrahedron structure of $mathrm{^{16}O}$ from the Woods-Saxon one and shed lights on the system scan projects in experiments.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91148915","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: 6

Sterile neutrino searches at tagged kaon beams 无菌中微子搜索标记的介子束

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-10-20 DOI: 10.1103/PHYSREVD.103.035018

Luis A. Delgadillo, P. Huber

引用次数: 4