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Revisiting the rare H → q i q j decays in the standard model 重新审视标准模型中罕见的H→q i q j衰变
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abb44d
J. I. Aranda, G. González-Estrada, J. Montano, F. Ramírez-Zavaleta, E. Tututi
{"title":"Revisiting the rare H → q i q j decays in the standard model","authors":"J. I. Aranda, G. González-Estrada, J. Montano, F. Ramírez-Zavaleta, E. Tututi","doi":"10.1088/1361-6471/abb44d","DOIUrl":"https://doi.org/10.1088/1361-6471/abb44d","url":null,"abstract":"","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"47 9","pages":"125001"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72605334","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
Nonadiabatic quasiparticle description of rotation-particle coupling in triaxial odd–odd nuclei 三轴奇-奇核中旋转-粒子耦合的非绝热准粒子描述
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abb6c2
P. Siwach, P. Arumugam, S. Modi, L. Ferreira, E. Maglione
{"title":"Nonadiabatic quasiparticle description of rotation-particle coupling in triaxial odd–odd nuclei","authors":"P. Siwach, P. Arumugam, S. Modi, L. Ferreira, E. Maglione","doi":"10.1088/1361-6471/abb6c2","DOIUrl":"https://doi.org/10.1088/1361-6471/abb6c2","url":null,"abstract":"A large wealth of data and a variety of models led to significant progress in understanding the spectra of deformed nuclei. However, a robust theoretical approach, which is less reliant on adjustable parameters is still elusive. Due to the scarcity of data, this drawback gets more pronounced while studying the exotic nuclei. With the motive to overcome this difficulty, we have developed the nonadiabatic quasiparticle approach for the description of rotational states in triaxial deformed odd–odd nuclei. The rotation-particle coupling is carried out utilizing an appropriate basis transformation such that the matrix elements of the odd–odd system can be written in terms of the rotor energies. This provides the advantage of studying the role of core more efficiently as compared to the conventional particle rotor model. The residual interaction between the valence proton and neutron is incorporated in two reliable ways, namely, the constant potential form and the zero-range interaction.","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"637 1","pages":"125105"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74736567","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
Understanding partonic energy loss from measured light charged particles and jets in PbPb collisions at LHC energies 了解在LHC能量下PbPb碰撞中测量的轻带电粒子和喷流的部分能量损失
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abb58a
P. Shukla, Kapil Saraswat
{"title":"Understanding partonic energy loss from measured light charged particles and jets in PbPb collisions at LHC energies","authors":"P. Shukla, Kapil Saraswat","doi":"10.1088/1361-6471/abb58a","DOIUrl":"https://doi.org/10.1088/1361-6471/abb58a","url":null,"abstract":"We perform a comprehensive study of partonic energy loss reflected in the nuclear modification factors of charged particles and jets measured in PbPb collisions at √ sNN = 2.76 and 5.02 TeV in wide transverse momentum (pT) and centrality range. The pT distributions in pp collisions are fitted with a modified power law and the nuclear modification factor in PbPb collisions can be obtained using effective shift (∆pT) in the spectrum measured at different centralities. Driven by physics consideration, the functional form of energy loss given by ∆pT can be assumed as power law with different power indices in three different pT regions. The power indices and the boundaries of three pT regions are obtained by fitting the measured nuclear modification factor as a function of pT in all collision centralities simultaneously. The energy loss in different collisions centralities are described in terms of fractional power of number of participants. It is demanded that the power law functions in three pT regions and their derivatives are continuous at the pT boundaries. The ∆pT for light charged particles is found to increase linearly with pT in low pT region below ∼ 5−6 GeV/c and approaches a constant value in high pT region above ∼ 22− 29 GeV/c with an intermediate power law connecting the two regions. The method is also used for jets and it is found that for jets, the ∆pT increases approximately linearly even at very high pT. ar X iv :2 10 5. 06 36 4v 1 [ he pph ] 1 3 M ay 2 02 1 Understanding partonic energy loss ... 2","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"3 1","pages":"125103"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80831761","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
Nucleonic localisation and alpha radioactivity 核子定域和α放射性
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abcf25
J. Ebran, E. Khan, R. Lasseri
{"title":"Nucleonic localisation and alpha radioactivity","authors":"J. Ebran, E. Khan, R. Lasseri","doi":"10.1088/1361-6471/abcf25","DOIUrl":"https://doi.org/10.1088/1361-6471/abcf25","url":null,"abstract":"","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89680268","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
Search for SU(2) V singlet Higgs boson in the Georgi–Machacek model at the LHC 在大型强子对撞机的george - machacek模型中寻找SU(2) V单线态希格斯玻色子
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abaddf
J. Zhu, Ren-You Zhang, Wen-gan Ma, Qiang Yang, M. Long, Yi Jiang
{"title":"Search for SU(2) V singlet Higgs boson in the Georgi–Machacek model at the LHC","authors":"J. Zhu, Ren-You Zhang, Wen-gan Ma, Qiang Yang, M. Long, Yi Jiang","doi":"10.1088/1361-6471/abaddf","DOIUrl":"https://doi.org/10.1088/1361-6471/abaddf","url":null,"abstract":"","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"49 1","pages":"125005"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90770924","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
Event-by-event mean-p t fluctuations from the AMPT model with a dynamical quark coalescence mechanism 具有动态夸克聚结机制的AMPT模型的逐事件mean- t涨落
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abb44e
Zhenyu Xu, J. Liu, Donghai Wei, J. Huo, Chunhui Zhang, L. Huo
{"title":"Event-by-event mean-p t fluctuations from the AMPT model with a dynamical quark coalescence mechanism","authors":"Zhenyu Xu, J. Liu, Donghai Wei, J. Huo, Chunhui Zhang, L. Huo","doi":"10.1088/1361-6471/abb44e","DOIUrl":"https://doi.org/10.1088/1361-6471/abb44e","url":null,"abstract":"","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"77 1","pages":"125102"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84987950","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
Photoproduction of K +Λ, ${K}_{S}^{0}{mathbf{Sigma }}^{+}$ and K +Σ0 on the proton K +Λ， ${K}_{S}^{0}{mathbf{Sigma}}^{+}$和K +Σ0在质子上的光产生
Journal of Physics G Pub Date : 2020-12-01 DOI: 10.1088/1361-6471/abb5bb
M. Egorov
{"title":"Photoproduction of K +Λ, ${K}_{S}^{0}{mathbf{Sigma }}^{+}$ and K +Σ0 on the proton","authors":"M. Egorov","doi":"10.1088/1361-6471/abb5bb","DOIUrl":"https://doi.org/10.1088/1361-6471/abb5bb","url":null,"abstract":"","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"71 1","pages":"125006"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76421714","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
Nucleon-nucleus optical potential computed with the Gogny interaction 用高格尼相互作用计算核子-核子光势
Journal of Physics G Pub Date : 2020-11-25 DOI: 10.1088/1361-6471/abcdf8
X. Viñas, Juan Lopez Moraña
{"title":"Nucleon-nucleus optical potential computed with the Gogny interaction","authors":"X. Viñas, Juan Lopez Moraña","doi":"10.1088/1361-6471/abcdf8","DOIUrl":"https://doi.org/10.1088/1361-6471/abcdf8","url":null,"abstract":"The ability of the Gogny forces of the D1 family to describe the nucleon-nucleus scattering is studied. To this end, we use an optical model potential built up using a semi-microscopic nuclear matter approach. The real and imaginary parts of the optical model are provided by the first and second-order terms, respectively, of the Taylor expansion of the mass operator calculated within the Brueckner-Hartree-Fock method using the reaction G-matrix built up with the effective Gogny force instead of a microscopic interaction. The optical potential in finite nuclei is obtained through the Local Density Approximation using the neutron and proton densities provided by a quasi-local Hartree-Fock calculation with the same Gogny force for the sake of consistency. A reasonable good agreement is found between the theoretical differential cross-sections and the analyzing powers of the elastic neutron and proton scattering along the periodic table from Ca to Pb calculated with the Gogny forces and the corresponding values predicted by the global phenomenological potential of Koning and Delaroche. To investigate the limits of the approximations used in this work, comparisons with the results of nucleon-nucleus elastic scattering in $^{40}$Ca and $^{48}$Ca obtained using the Nuclear Structure Model are also performed.","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"130 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84925343","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
Two-delta shell resonance description of α-decay: analytic expression of half-life via energy derivative of phase-shift α-衰变的双δ壳共振描述:通过相移的能量导数解析半衰期
Journal of Physics G Pub Date : 2020-11-23 DOI: 10.1088/1361-6471/abcd1d
B. Sahu
{"title":"Two-delta shell resonance description of α-decay: analytic expression of half-life via energy derivative of phase-shift","authors":"B. Sahu","doi":"10.1088/1361-6471/abcd1d","DOIUrl":"https://doi.org/10.1088/1361-6471/abcd1d","url":null,"abstract":"","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"91 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85665304","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
An exploratory study of the impact of CMS double-differential top distributions on the gluon parton distribution function CMS双微分顶分布对胶子部分子分布函数影响的探索性研究
Journal of Physics G Pub Date : 2020-11-23 DOI: 10.1088/1361-6471/abb1b6
M. Czakon, S. Dulat, T. Hou, J. Huston, A. Mitov, A. Papanastasiou, Ibrahim Sitiwaldi, Zhite Yu, C. Yuan
{"title":"An exploratory study of the impact of CMS double-differential top distributions on the gluon parton distribution function","authors":"M. Czakon, S. Dulat, T. Hou, J. Huston, A. Mitov, A. Papanastasiou, Ibrahim Sitiwaldi, Zhite Yu, C. Yuan","doi":"10.1088/1361-6471/abb1b6","DOIUrl":"https://doi.org/10.1088/1361-6471/abb1b6","url":null,"abstract":"LHC $tbar{t}$ data have the potential to provide constraints on the gluon distribution, especially at high $x$, with both ATLAS and CMS performing differential measurements. Recently, CMS has measured double-differential $tbar{t}$ distributions at 8 TeV. In this paper we examine the impact of this data set on the gluon distribution. To that end we develop novel, double-differential NNLO predictions for that data. No significant impact is found when the CMS data is added to the CT14HERA2 global PDF fit, due to the larger impact of the inclusive jet data from both the Tevatron and the LHC. If the jet data are removed from the fit, then an impact is observed. If the CMS data is scaled by a larger weight, representing the greater statistical power of the jet data, a roughly equal impact on the gluon distribution is observed for the $tbar{t}$ as for the inclusive jet data. For data samples with higher integrated luminosity at 13 TeV, a more significant impact of the double-differential $tbar{t}$ data may be observed.","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"26 1","pages":"015003"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78271010","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: 12
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