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Flavor Violation at LHC in Events with Two Opposite Sign Leptons and a B-Jet 具有两个相反符号轻子和一个b型喷气机的大型强子对撞机事件的风味冲突
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-25 DOI: 10.1007/978-981-33-4408-2_34
N. Kumar
{"title":"Flavor Violation at LHC in Events with Two Opposite Sign Leptons and a B-Jet","authors":"N. Kumar","doi":"10.1007/978-981-33-4408-2_34","DOIUrl":"https://doi.org/10.1007/978-981-33-4408-2_34","url":null,"abstract":"","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88697375","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: 1
Flavor structure of anomaly-free hidden photon models 无异常隐藏光子模型的风味结构
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-25 DOI: 10.1103/PHYSREVD.103.075024
M. Bauer, P. Foldenauer, Martin Mosny
{"title":"Flavor structure of anomaly-free hidden photon models","authors":"M. Bauer, P. Foldenauer, Martin Mosny","doi":"10.1103/PHYSREVD.103.075024","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.075024","url":null,"abstract":"Extensions of the Standard Model with an abelian gauge group are constrained by gauge anomaly cancellation, so that only a limited number of possible charge assignments is allowed without the introduction of new chiral fermions. For flavour universal charges, couplings of the associated hidden photon to Standard Model fermions are flavour conserving at tree-level. We show explicitly that even the flavour specific charge assignments allowed by anomaly cancellation condition lead to flavour conserving tree-level couplings of the hidden photon to quarks and charged leptons emph{if} the CKM or PMNS matrix can be successfully reconstructed. Further, loop-induced flavour changing couplings are strongly suppressed. As a consequence, the structure of the Majorana mass matrix is constrained and flavour changing tree-level couplings of the hidden photon to neutrino mass eigenstates are identified as a means to distinguish the $U(1)_{B-L}$ gauge boson from any other anomaly-free extension of the Standard Model without new chiral fermions. We present a comprehensive analysis of constraints and projections for future searches for a $U(1)_{B-3L_i}$ gauge boson, calculate the reach of resonance searches in $B$ meson decays and comment on the implications for non-standard neutrino interactions.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84274185","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: 14
Inclusive diffractive heavy quarkonium photoproduction including quark subprocesses 包括夸克子过程的包涵衍射重夸克子光生产
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-25 DOI: 10.1103/PhysRevC.104.015204
Jiayu Wu, Yanbing Cai, W. Xiang
{"title":"Inclusive diffractive heavy quarkonium photoproduction including quark subprocesses","authors":"Jiayu Wu, Yanbing Cai, W. Xiang","doi":"10.1103/PhysRevC.104.015204","DOIUrl":"https://doi.org/10.1103/PhysRevC.104.015204","url":null,"abstract":"The inclusive $J/Psi$, $Psi(2S)$ and $Upsilon(1S)$ direct and resolved photoproduction are investigated by including the quark subprocesses in the framework of non-relativistic quantum chromodynamics (NRQCD). We find that the theoretical total cross section of heavy quarkonium productions are in good agreement with the data available at HERA, once the $gamma q$, $qg$ and $qq$ subprocesses in the heavy quark pair productions are taken into account. The inclusive diffractive rapidity and transverse momentum distributions of $J/Psi$, $Psi(2S)$ and $Upsilon(1S)$ in $pp$, $pPb$ and $PbPb$ collisions at LHC are also studied by our quark improved NRQCD model combined with the resolved pomeron model. We find that the contributions from the quark involved subprocesses can reach to $8%$ in the rapidity distribution and $6%$ in the transverse momentum distribution. The numerical results show that the contributions from quark involved subprocesses are significant in heavy quarkonium photoprodution.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88512465","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
Low energy phenomena of the lepton sector in an $A_4$ symmetry model with heavy inverse seesaw neutrinos 具有重反跷跷板中微子的$A_4$对称模型中轻子扇区的低能现象
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-24 DOI: 10.1093/ptep/ptac002
T. P. Nguyen, T. T. Thuc, D. T. Si, T.T.Hong, L. T. Hue
{"title":"Low energy phenomena of the lepton sector in an $A_4$ symmetry model with heavy inverse seesaw neutrinos","authors":"T. P. Nguyen, T. T. Thuc, D. T. Si, T.T.Hong, L. T. Hue","doi":"10.1093/ptep/ptac002","DOIUrl":"https://doi.org/10.1093/ptep/ptac002","url":null,"abstract":"An extension of the two Higgs doublet model including inverse seesaw neutrinos and neutral Higgs bosons was constructed based on the $A_4$ symmetry in order to explain the recent neutrino oscillation data. This model can distinguish two well-known normal and inverted order schemes of neutrino data once both the effective masses $m_{beta}$ in tritium beta decays and $langle mrangle$ in the neutrinoless double beta decay are observed. The lepton flavor violating decays of the charged leptons $e_brightarrow e_agamma$, $murightarrow3e$, the Standard model-like Higgs boson decays $hrightarrow e_be_a$, and the $mu$-e conversions in some nuclei arise from loop corrections. The experimental data of the branching ratio Br$(murightarrow egamma, 3e)$ predicts that the upper bounds of Br$(tau rightarrow mugamma,egamma)$ and Br$(hrightarrow e_{a}e_b)$ are much smaller than the planned experimental sensitivities. In contrast, the $mu$-e conversions are the promising signals for experiments.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90028978","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
Decoding the nature of Zcs(3985) and establishing the spectrum of charged heavy quarkoniumlike states in chiral effective field theory 破译Zcs(3985)的性质，建立手性有效场论中带电重夸克类态谱
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-22 DOI: 10.1103/PHYSREVD.103.L021501
Bo Wang, L. Meng, Shi-Lin Zhu
{"title":"Decoding the nature of \u0000Zcs(3985)\u0000 and establishing the spectrum of charged heavy quarkoniumlike states in chiral effective field theory","authors":"Bo Wang, L. Meng, Shi-Lin Zhu","doi":"10.1103/PHYSREVD.103.L021501","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.L021501","url":null,"abstract":"We study the newly observed charmoniumlike state $Z_{cs}(3985)$ in the framework of chiral effective field theory. The interaction kernel of the $bar{D}_sD^ast/bar{D}^ast_sD$ system is calculated up to the next-to-leading order with the explicit chiral dynamics. With the fitted parameters extracted from the $Z_c(3900)$ data as inputs, the mass, width and event distributions of the $Z_{cs}(3985)$ are very consistent with the experimental measurements. Our studies strongly support the $Z_{cs}(3985)$ as the partner of the $Z_c(3900)$ in the SU(3)$_f$ symmetry and the $bar{D}_sD^ast/bar{D}^ast_sD$ molecular resonance with the same dynamical origin as the other charged heavy quarkoniumlike states. We precisely predict the resonance parameters of the unobserved states in $bar{D}_s^ast D^ast$, $B^ast_s bar{B}/B_sbar{B}^ast$ and $B_s^astbar{B}^ast$ systems, and establish a complete spectrum of the charged charmoniumlike and bottomoniumlike states with the $I(J^P)$ quantum numbers $1(1^+)$ and $frac{1}{2}(1^+)$, respectively.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79030285","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: 8
Resummation effects in weak SUSY processes 弱SUSY过程的恢复效应
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-21 DOI: 10.22323/1.390.0239
J. Fiaschi, M. Klasen
{"title":"Resummation effects in weak SUSY processes","authors":"J. Fiaschi, M. Klasen","doi":"10.22323/1.390.0239","DOIUrl":"https://doi.org/10.22323/1.390.0239","url":null,"abstract":"We present updated results for the production cross sections of slepton pairs and neutralino-chargino pairs at the LHC with next-to-next-to logarithmic precision matched at approximate QCD next-to-next-to leading order. The explored range of masses of the supersymmetric particles are chosen to be relevant for current and future searches at the LHC. We find moderate increases in the invariant mass distributions and integrated cross sections, and substantial reductions in the scale uncertainty of the results.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77449512","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
Testing momentum dependence of the nonperturbative hadron structure in a global QCD analysis 在全局QCD分析中检验非微扰强子结构的动量依赖性
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-19 DOI: 10.1103/PHYSREVD.103.054029
A. Courtoy, P. Nadolsky
{"title":"Testing momentum dependence of the nonperturbative hadron structure in a global QCD analysis","authors":"A. Courtoy, P. Nadolsky","doi":"10.1103/PHYSREVD.103.054029","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.054029","url":null,"abstract":"We discuss strategies for comparisons of nonperturbative QCD predictions for parton distribution functions (PDFs) with high-energy experiments in the region of large partonic momentum fractions $x$. Analytic functional forms for PDFs cannot be uniquely determined solely based on discrete experimental measurements because of a mathematical property of mimicry of PDF parametrizations that we prove using a representation based on B'ezier curves. Predictions of nonperturbative QCD approaches for the $x$ dependence of PDFs instead should be cast in a form that enables decisive comparisons against experimental measurements. Predictions for effective power laws of $(1-x)$ dependence of PDFs may play this role. Expectations for PDFs in a proton based on quark counting rules are compared against the effective power laws of $(1-x)$ dependence satisfied by CT18 next-to-next-to-leading order parton distributions. We comment on implications for studies of PDFs in a pion, in particular on the comparison of nonperturbative approaches with phenomenological PDFs.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76761885","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
Reaching the Planck scale with muon lifetime measurements 通过测量介子寿命达到普朗克尺度
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-19 DOI: 10.1103/PhysRevD.103.106025
I. Lobo, C. Pfeifer
{"title":"Reaching the Planck scale with muon lifetime measurements","authors":"I. Lobo, C. Pfeifer","doi":"10.1103/PhysRevD.103.106025","DOIUrl":"https://doi.org/10.1103/PhysRevD.103.106025","url":null,"abstract":"Planck scale modified dispersion relations are one way how to capture the influence of quantum gravity on the propagation of fundamental point particles effectively. We derive the time dilation between an observer's or particle's proper time, given by a Finslerian length measure induced from a modified dispersion relation, and a reference laboratory time. To do so, the Finsler length measure for general first order perturbations of the general relativistic dispersion relation is constructed explicitly. From this we then derive the time dilation formula for the $kappa$-Poincar'e dispersion relation in several momentum space bases, as well as for modified dispersion relations considered in the context of loop quantum gravity and Hov{r}ava-Lifshitz gravity. Most interestingly we find that the momentum Lorentz factor in the present and future colliders can, in principle, become large enough to constrain the $kappa$-Poincar'e dispersion relation in the bicrossproduct basis with Planck scale sensitivity with help of the muon's lifetime.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80750390","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: 21
Theoretical and experimental status of rare charm decays 稀有粲衰变的理论与实验现状
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-18 DOI: 10.1142/S0217732321300020
H. Gisbert, Marcel Golz, D. Mitzel
{"title":"Theoretical and experimental status of rare charm decays","authors":"H. Gisbert, Marcel Golz, D. Mitzel","doi":"10.1142/S0217732321300020","DOIUrl":"https://doi.org/10.1142/S0217732321300020","url":null,"abstract":"Rare charm decays offer the unique possibility to explore flavour-changing neutral-currents in the up-sector within the Standard Model and beyond. Due to the lack of effective methods to reliably describe its low energy dynamics, rare charm decays have been considered as less promising for long. However, this lack does not exclude the possibility to perform promising searches for New Physics per se, but a different philosophy of work is required. Exact or approximate symmetries of the Standard Model allow to construct clean null-test observables, yielding an excellent road to the discovery of New Physics, complementing the existing studies in the down-sector. In this review, we summarise the theoretical and experimental status of rare charm $|Delta c|=|Delta u|=1$ transitions, as well as opportunities for current and future experiments such as LHCb, Belle II, BES III and the FCC-ee. We also use the most recent experimental results to report updated limits on lepton-flavour conserving and lepton-flavour violating Wilson coefficients.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90416817","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: 10
Study the $$B^{0}_{(s)}$$ decays into $$phi $$ and a scalar or vector meson 研究$$B^{0}_{(s)}$$衰变为$$phi $$和一个标量或矢量介子
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-11-17 DOI: 10.1140/epjc/s10052-021-09497-8
Hiwa A. Ahmed, Zhong-Yu Wang, Zhi-Feng Sun, C. Xiao
{"title":"Study the $$B^{0}_{(s)}$$ decays into $$phi $$ and a scalar or vector meson","authors":"Hiwa A. Ahmed, Zhong-Yu Wang, Zhi-Feng Sun, C. Xiao","doi":"10.1140/epjc/s10052-021-09497-8","DOIUrl":"https://doi.org/10.1140/epjc/s10052-021-09497-8","url":null,"abstract":"","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84214433","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: 8
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