arXiv: High Energy Physics - Phenomenology最新文献_第7页

Zcs(3985)− as the U-spin partner of Zc(3900)− and implication of other states in the SU(3)F symmetry and heavy quark symmetry Zcs(3985)−作为Zc(3900)−的u自旋伙伴以及SU(3)F对称和重夸克对称中其他态的含义

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-17 DOI: 10.1103/physrevd.102.111502

L. Meng, Bo Wang, Shi-Lin Zhu

{"title":"Zcs(3985)−\u0000 as the \u0000U\u0000-spin partner of \u0000Zc(3900)−\u0000 and implication of other states in the \u0000SU(3)F\u0000 symmetry and heavy quark symmetry","authors":"L. Meng, Bo Wang, Shi-Lin Zhu","doi":"10.1103/physrevd.102.111502","DOIUrl":"https://doi.org/10.1103/physrevd.102.111502","url":null,"abstract":"Recently, for the first time, the BESIII Collaboration reported the strange hidden charm tetraquark states $Z_{cs}(3985)^-$ in the $K^+$ recoil-mass spectrum near the $D_{s}^{-}D^{*0}/ D_{s}^{*-}D^{0}$ mass thresholds in the processes of $e^{+}e^{-}to K^{+}(D_{s}^{-}D^{*0}+D_{s}^{*-}D^{0})$ at $sqrt{s}=4.681$ GeV. The significance was estimated to be 5.3 $sigma$. We show that the newly observed $Z_{cs}(3985)^-$ state is the $U$-spin partner of $Z_c(3900)^{-}$ as a resonance within coupled-channel calculation in the $text{SU(3)}_F$ symmetry and heavy quark spin symmetry (HQSS). In the $text{SU(3)}_F$ symmetry, we introduce the $G_{U/V}$ parity to construct the flavor wave functions of the $Z_{cs}$ states. In a unified framework, we consider the $J/psipi(K)$, $bar{D}_{(s)}{D}^*/bar{D}_{(s)}^*{D}$ coupled-channel effect with the contact interaction. With the masses and widths of $Z_c(3900)$ and $Z_c(4020)$, we determine all the unknown coupling constants. We obtain mass and width of $Z_{cs}(3985)$ in good agreement with the experimental results, which strongly supports the $Z_{cs}$ states as the $U/V$-spin partner states of the charged $Z_c(3900)$. We also calculate the ratio of the partial decay widths of $Z_{cs}(3985)$, which implies that the $bar{D}_sD^*/bar{D}^*_s D$ decay modes are dominant. We also predict the $Z_{cs}^prime$ states with a mass around $4130$ MeV and width around $30$ MeV, which are the $U/V$-spin partner states of the charged $Z_c(4020)$ and HQSS partner states of the $Z_{cs}(3985)$. In the hidden bottom sector, we predict the strange tetraquark states $Z_{bs}$ and $Z_{bs}^prime$ with a mass around 10700 MeV and 10750 MeV, which are the $U/V$-spin partner states of $Z_{b}(10610)^{pm}$ and $Z_b(10650)^{pm}$, respectively.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76865170","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: 18

Field dependence of the Yukawa coupling in the three flavor quark-meson model 三味夸克-介子模型中汤川耦合的场依赖性

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-17 DOI: 10.1103/PHYSREVD.103.056015

G. Fejős, A. Patkós

引用次数: 1

IR-improved DGLAP parton shower effects for associated production of a W boson and jets in pp collisions at s = 8 and 13 TeV 在s = 8和13 TeV的pp碰撞中，红外改进的DGLAP部分子阵雨效应对W玻色子和喷流的相关产生

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-16 DOI: 10.1142/S0217751X20501973

B. Shakerin, B. Ward

{"title":"IR-improved DGLAP parton shower effects for associated production of a W boson and jets in pp collisions at s = 8 and 13 TeV","authors":"B. Shakerin, B. Ward","doi":"10.1142/S0217751X20501973","DOIUrl":"https://doi.org/10.1142/S0217751X20501973","url":null,"abstract":"In a previous paper, hereafter referred to as I, we have analyzed the 7 TeV LHC data on W + jets events from the standpoint of IR-improved DGLAP parton shower effects, using the IR-improved Herwiri1.031 parton shower MC in comparison with the Herwig6.5 parton shower MC in the context of the exact $O(alpha_s)$ matrix element matched parton shower framework provided by MG5_aMC@NLO. In the current paper, we extend this analysis to the LHC 8 and 13 TeV data to investigate the energy dependence of the results obtained in I. Specifically, W~+ jet events are generated in the MADGRAPH5_aMC@NLO framework and showered by HERWIG6.521 and HERWIRI1.031 with $mathtt{PTRMS}=2.2$ and 0 GeV, respectively. The differential cross sections are reported as functions of jet multiplicity, transverse linear momenta ($P_{T}$), the jet pesudo-rapidity ($eta$) and the scalar sum of jet transverse momenta ($H_{T}$) for different jet multiplicities 1--3. The dijet cross sections as functions of transverse linear momenta, invariant mass of the dijet and the jet separation are shown as well. Distributions of angular correlations between the jets and the muon are examined as well and the corresponding cross sections are presented. The respective measured cross sections are compared with the exact next-to-leading-order (NLO) matrix element matched parton shower theoretical predictions provided by MADGRAPH5_aMC@NLO/HERWIRI1.031~($mathtt{PTRMS}=0)$ and MADGRAPH5_aMC@NLO/HERWIG6.521~($mathtt{PTRMS}=2.2~mathrm{GeV})$ and the phenomenological consequences are discussed with an eye toward their energy dependence.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"83 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80405700","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

Chiral gauge leptoquark mass limits and branching ratios of KL0,B0,Bs → li+lj− decays with account of the general fermion mixing in leptoquark currents 考虑费米子在轻夸克电流中的混合，手性规范轻夸克的KL0,B0,Bs→li+lj−的质量极限和分支比

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-16 DOI: 10.1142/s0217732321500188

M. Martynov, A. D. Smirnov

{"title":"Chiral gauge leptoquark mass limits and branching ratios of KL0,B0,Bs → li+lj− decays with account of the general fermion mixing in leptoquark currents","authors":"M. Martynov, A. D. Smirnov","doi":"10.1142/s0217732321500188","DOIUrl":"https://doi.org/10.1142/s0217732321500188","url":null,"abstract":"The contributions of the chiral gauge leptoquarks $V^{L,R}$ induced by the chiral four color quark-lepton symmetry to the branching ratios of $ K_L^0, B^0, B_s to l_1 , l_2 $ decays are calculated and analysed using the general parametrizations of the fermion mixing matrices in the leptoguark currents. From the current experimental data on these decays under assumption $ m_{V^L} ll m_{V^R} $ the lower mass limit $ m_{V^L} cos{gamma_L} > 5.68 ,, mbox{TeV}$ is found, which in particular case of equal gauge coupling constants gives $ m_{V^L} > 8.03 ,, mbox{TeV} $. The branching ratios of the decays under consideration predicted by the chiral gauge leptoquarks are calculated and analysed in dependence on the leptoquark masses and the mixing parameters. It is shown that in consistency with the current experimental data these branching ratios for $ B_s, B^0 to mu e $ decays can be close to their experimental limits and those for $ B_s, B^0 to tau e, tau mu $ decays can be of order of~$10^{-7}$. The calculated branching ratios will be useful in the further experimental searches for these decays.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80269642","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

Reflection identities of harmonic sums and pole decomposition of BFKL eigenvalue 调和和的反射恒等式与BFKL特征值的极点分解

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-16 DOI: 10.1142/S0217751X21500251

Mohammad Joubat, A. Prygarin

引用次数: 4

Can discovery of hidden charm strange pentaquark states help determine the spins of Pc(4440) and Pc(4457)? 发现隐藏的魅力奇异五夸克态能帮助确定Pc(4440)和Pc(4457)的自旋吗?

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-16 DOI: 10.1103/PHYSREVD.103.034003

Ming-Zhu Liu, Ya-Wen Pan, L. Geng

引用次数: 26

Can the newly reported Pcs(4459) be a strange hidden-charm ΞcD¯* molecular pentaquark? 新报道的Pcs(4459)会是一个奇怪的隐蔽粲粲ΞcD¯*分子五夸克吗？

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-14 DOI: 10.1103/PHYSREVD.103.054007

Rui Chen

引用次数: 27

Strong vertices of doubly heavy spin-3/2–spin-1/2 baryons with light mesons in light-cone QCD sum rules 光锥QCD和规则中双重自旋-3/2 -自旋-1/2重子与轻介子的强顶点

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-13 DOI: 10.1103/PHYSREVD.103.054044

T. Aliev, K. Şimşek

引用次数: 4

Suppression of electroweak instanton processes in high-energy collisions 高能碰撞中电弱瞬子过程的抑制

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-13 DOI: 10.1142/S0217751X21500329

V. Khoze, D. Milne

引用次数: 4

Low energy constraints from absolute neutrino mass observables and lepton flavor violation in left-right symmetric model 绝对中微子质量观测的低能约束和左右对称模型中的轻子风味违逆

arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-12 DOI: 10.1103/PHYSREVD.103.055016

S. Goswami, K. N. Vishnudath

{"title":"Low energy constraints from absolute neutrino mass observables and lepton flavor violation in left-right symmetric model","authors":"S. Goswami, K. N. Vishnudath","doi":"10.1103/PHYSREVD.103.055016","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.055016","url":null,"abstract":"We have studied the correlations among the three absolute neutrino mass observables - the effective Majorana mass ($m_{ee}$) which can be obtained from neutrinoless double beta decay, the electron neutrino mass ($m_{beta}$) which is measured in single beta decay experiments and the sum of the light neutrino masses ($Sigma$) which is constrained from cosmological observations, in the context of minimal left-right symmetric model. Two phenomenologically interesting cases of type-I seesaw dominance as well as type-II seesaw dominance have been considered. We have taken into account the independent constraints coming from lepton flavor violation, single $beta$ decay, cosmology and neutrinoless double beta decay and have determined the combined allowed parameter space that can be probed in the future experiments. We have also analyzed the correlations and tensions between the different mass variables. In addition, the constraints on the masses of the heavy particles coming from lepton flavor violation and the bounds on three absolute neutrino mass observables are also determined. We show that these constraints can rule out some of the parameter space which are not probed by the collider experiments.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"177 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79868519","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: 4