arXiv: High Energy Physics - Phenomenology最新文献

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The Logarithmic Contributions to the Polarized and Operator Matrix Elements in Deeply Inelastic Scattering 深度非弹性散射中极化和算子矩阵元的对数贡献
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-05-20 DOI: 10.1103/PhysRevD.104.034030
J. Blumlein, A. D. Freitas, M. Saragnese, Schneider, K. Schonwald
{"title":"The Logarithmic Contributions to the Polarized and Operator Matrix Elements in Deeply Inelastic Scattering","authors":"J. Blumlein, A. D. Freitas, M. Saragnese, Schneider, K. Schonwald","doi":"10.1103/PhysRevD.104.034030","DOIUrl":"https://doi.org/10.1103/PhysRevD.104.034030","url":null,"abstract":"We compute the logarithmic contributions to the polarized massive Wilson coefficients for deep-inelastic scattering in the asymptotic region $Q^2 gg m^2$ to 3-loop order in the fixed-flavor number scheme and present the corresponding expressions for the polarized massive operator matrix elements needed in the variable flavor number scheme. The calculation is performed in the Larin scheme. For the massive operator matrix elements $A_{qq,Q}^{(3),rm PS}$ and $A_{qg,Q}^{(3),rm S}$ the complete results are presented. The expressions are given in Mellin-$N$ space and in momentum fraction $z$-space.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"3 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83623100","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
Fast flavor instabilities and the search for neutrino angular crossings 快速风味不稳定性和寻找中微子角交叉
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-04-08 DOI: 10.1103/PhysRevD.103.123012
Lucas Johns, H. Nagakura
{"title":"Fast flavor instabilities and the search for neutrino angular crossings","authors":"Lucas Johns, H. Nagakura","doi":"10.1103/PhysRevD.103.123012","DOIUrl":"https://doi.org/10.1103/PhysRevD.103.123012","url":null,"abstract":"With the recognition that fast flavor instabilities likely affect supernova and neutron-star-merger neutrinos, using simulation data to pin down when and where the instabilities occur has become a high priority. The effort faces an interesting problem. Fast instabilities are related to neutrino angular crossings, but simulations often employ moment methods, sacrificing momentum-space angular resolution in order to allocate resources elsewhere. How can limited angular information be used most productively? The main aims here are to sharpen this question and examine some of the available answers. A recently proposed method of searching for angular crossings is scrutinized, the limitations of moment closures are highlighted, and two ways of reconstructing angular distributions solely from the flux factors (based respectively on maximum-entropy and sharp-decoupling assumptions) are compared. In (semi)transparent regions, the standard closure prescriptions likely miss some crossings that should be there and introduce others that should not.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87888508","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: 20
Chiral susceptibility in a dense thermomagnetic QCD medium within the hard thermal loop approximation 硬热环近似下致密热磁QCD介质的手性磁化率
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-03-15 DOI: 10.1103/PHYSREVD.103.074019
R. Ghosh, B. Karmakar, M. G. Mustafa
{"title":"Chiral susceptibility in a dense thermomagnetic QCD medium within the hard thermal loop approximation","authors":"R. Ghosh, B. Karmakar, M. G. Mustafa","doi":"10.1103/PHYSREVD.103.074019","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.074019","url":null,"abstract":"We have computed the chiral susceptibility in quark-gluon plasma in presence of finite chemical potential and weak magnetic field within hard thermal loop approximation. First we construct the massive effective quark propagator in a thermomagnetic medium. Then we obtain completely analytic expression for the chiral susceptibility in weak magnetic field approximation. In the absence of magnetic field the thermal chiral susceptibility increases in presence of finite chemical potential. The effect of thermomagnetic correction is found to be very marginal as temperature is the dominant scale in weak field approximation.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82859922","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
On the radiation of an arbitrary moving permanent magnetic moment 关于任意移动永磁矩的辐射
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-02-23 DOI: 10.17223/00213411/63/11/179
B. Zon, V. Chernov, M. University, Voronezh, Russia., A. D. O. P. Sciences, S. Petersburg, Russia G. Racah Institute of Physics of the Hebrew University, Jérusalem, Israel.
{"title":"On the radiation of an arbitrary moving permanent magnetic moment","authors":"B. Zon, V. Chernov, M. University, Voronezh, Russia., A. D. O. P. Sciences, S. Petersburg, Russia G. Racah Institute of Physics of the Hebrew University, Jérusalem, Israel.","doi":"10.17223/00213411/63/11/179","DOIUrl":"https://doi.org/10.17223/00213411/63/11/179","url":null,"abstract":"It is demonstrated that a constant magnetic moment does not emit electo-magnetic radiation while moving in an arbitrary field","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74952870","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
Higgs alignment and the top quark 希格斯排列和顶夸克
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-02-14 DOI: 10.1103/PhysRevD.103.115022
E. Eichten, K. Lane
{"title":"Higgs alignment and the top quark","authors":"E. Eichten, K. Lane","doi":"10.1103/PhysRevD.103.115022","DOIUrl":"https://doi.org/10.1103/PhysRevD.103.115022","url":null,"abstract":"There is a surprising connection between the top quark and Higgs alignment in Gildener-Weinberg multi-Higgs doublet models. Were it not for the top quark and its large mass, the coupling of the 125 GeV Higgs boson $H$ to gauge bosons and fermions would be indistinguishable from those of the Standard Model Higgs. The top quark's coupling to a single Higgs doublet breaks this perfect alignment in higher orders of the Coleman-Weinberg loop expansion of the effective potential. But the effect is still small, $< {cal{O}}(1%)$, and probably experimentally inaccessible.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73661170","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: 3
Measuring solar neutrinos over gigayear timescales with paleo detectors 用古探测器测量十亿年时间尺度上的太阳中微子
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-02-02 DOI: 10.1103/PhysRevD.103.123016
N. Tapia-Arellano, S. Horiuchi
{"title":"Measuring solar neutrinos over gigayear timescales with paleo detectors","authors":"N. Tapia-Arellano, S. Horiuchi","doi":"10.1103/PhysRevD.103.123016","DOIUrl":"https://doi.org/10.1103/PhysRevD.103.123016","url":null,"abstract":"Measuring the solar neutrino flux over gigayear timescales could provide a new window to inform the Solar Standard Model as well as studies of the Earth's long-term climate. We demonstrate the feasibility of measuring the time-evolution of the $^8$B solar neutrino flux over gigayear timescales using paleo detectors, naturally occurring minerals which record neutrino-induced recoil tracks over geological times. We explore suitable minerals and identify track lengths of 15--30 nm to be a practical window to detect the $^8$B solar neutrino flux. A collection of ultra-radiopure minerals of different ages, each some 0.1 kg by mass, can be used to probe the rise of the $^8$B solar neutrino flux over the recent gigayear of the Sun's evolution. We also show that models of the solar abundance problem can be distinguished based on the time-integrated tracks induced by the $^8$B solar neutrino flux.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"169 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75490476","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
Super heavy particle production in high energy heavy ion collision 高能重离子碰撞中超重粒子的产生
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-01-22 DOI: 10.21203/RS.3.RS-150643/V1
Kurepin Alexey
{"title":"Super heavy particle production in high energy heavy ion collision","authors":"Kurepin Alexey","doi":"10.21203/RS.3.RS-150643/V1","DOIUrl":"https://doi.org/10.21203/RS.3.RS-150643/V1","url":null,"abstract":"The estimate based on the parton model is made on the rate of production of Super Heavy Particle ( SHP ) in subthreshold collision of heavy ions at LHC. For the one month run of lead-lead collision the yield of 16 TeV particle is of the order of 70 per year.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"153 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83171968","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 evidence of triple kinetic freezeout scenario observed in all centrality intervals in Cu-Cu, Au-Au and Pb-Pb collisions at high energies. 在高能Cu-Cu、Au-Au和Pb-Pb碰撞中,在所有中心间隔观察到三重动力学冻结情景的证据。
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-01-20 DOI: 10.1088/1361-6471
M. Waqas, G. Peng, Fu-Hu Liu
{"title":"An evidence of triple kinetic freezeout scenario observed in all centrality intervals in Cu-Cu, Au-Au and Pb-Pb collisions at high energies.","authors":"M. Waqas, G. Peng, Fu-Hu Liu","doi":"10.1088/1361-6471","DOIUrl":"https://doi.org/10.1088/1361-6471","url":null,"abstract":"Transverse momentum spectra of $pi^+$, $K^+$, $p$, $K^0_s$, $Lambda$, $Xi$ or $barXi^+$ and $Omega$ or $barOmega^+$ or $Omega+barOmega$ in Copper-Copper (Cu-Cu), Gold-Gold (Au-Au) and Lead-Lead (Pb-Pb) collisions at 200 GeV, 62.4 GeV and 2.76 TeV respectively, are analyzed in different centrality bins by the blast wave model with Tsallis statistics. The model results are approximately in agreement with the experimental data measured by BRAHMS, STAR and ALICE Collaborations in special transverse momentum ranges. Kinetic freeze out temperature, transverse flow velocity and kinetic freezeout volume are extracted from the transverse momentum spectra of the particles. It is observed that $barXi^+$ and $Omega$ or $barOmega^+$ or $Omega+barOmega$ have larger kinetic freezeout temperature followed by $K^+$, $K^0_s$ and $Lambda$ than $pi^+$ and $p$ due to smaller reaction cross-sections of multi-strange and strange particles than non-strange particles. The present work reveals the scenario of triple kinetic freezeout in collisions at BRAHMS, STAR and ALICE Collaborations, however the transverse flow velocity and kinetic freezeout volume are mass dependent and they decrease with the increasing rest mass of the particle. In addition, the kinetic freezeout temperature, transverse flow velocity and kinetic freezeout volume are decreasing from central to peripheral collisions while the parameter q increase from central to peripheral collisions, indicating the approach of quick equilibrium in the central collisions. Besides, the kinetic freezeout temperature and kinetic freezeout volume are observed to be larger in larger collision system which shows its dependence on the size of the interacting system, while transverse flow velocity increase with increasing energy.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90287896","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
A survey of heavy-antiheavy hadronic molecules 重-反-重强子分子的研究进展
arXiv: High Energy Physics - Phenomenology Pub Date : 2021-01-04 DOI: 10.13725/j.cnki.pip.2021.02.001
Xiang-Kun Dong, F. Guo, B. Zou
{"title":"A survey of heavy-antiheavy hadronic molecules","authors":"Xiang-Kun Dong, F. Guo, B. Zou","doi":"10.13725/j.cnki.pip.2021.02.001","DOIUrl":"https://doi.org/10.13725/j.cnki.pip.2021.02.001","url":null,"abstract":"Many efforts have been made to reveal the nature of the overabundant resonant structures observed by the worldwide experiments in the last two decades. Hadronic molecules attract special attention because many of these seemingly unconventional resonances are located close to the threshold of a pair of hadrons. To give an overall feature of the spectrum of hadronic molecules composed of a pair of heavy-antiheavy hadrons, namely, which pairs are possible to form molecular states, we take charmed hadrons for example to investigate the interaction between them and search for poles by solving the Bethe-Salpeter equation. We consider all possible combinations of hadron pairs of the $S$-wave singly-charmed mesons and baryons as well as the narrow $P$-wave charmed mesons. The interactions, which are assumed to be meson-exchange saturated, are described by constant contact terms which are resummed to generate poles. It turns out that if a system is attractive near threshold by the light meson exchange, there is a pole close to threshold corresponding to a bound state or a virtual state, depending on the strength of interaction and the cutoff. In total, 229 molecular states are predicted. The observed near-threshold structures with hidden-charm, like the famous $X(3872)$ and $P_c$ states, fit into the spectrum we obtain. We also highlight a $Lambda_cbar Lambda_c$ bound state that has a pole consistent with the cross section of the $e^+e^-toLambda_cbar Lambda_c$ precisely measured by the BESIII Collaboration.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"364 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72696647","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: 65
Measuring QCD Splittings with Invertible Networks 用可逆网络测量QCD分裂
arXiv: High Energy Physics - Phenomenology Pub Date : 2020-12-17 DOI: 10.21468/SciPostPhys.10.6.126
S. Bieringer, A. Butter, Theo Heimel, S. Hoche, Ullrich Kothe, T. Plehn, Stefan T. Radev
{"title":"Measuring QCD Splittings with Invertible Networks","authors":"S. Bieringer, A. Butter, Theo Heimel, S. Hoche, Ullrich Kothe, T. Plehn, Stefan T. Radev","doi":"10.21468/SciPostPhys.10.6.126","DOIUrl":"https://doi.org/10.21468/SciPostPhys.10.6.126","url":null,"abstract":"QCD splittings are among the most fundamental theory concepts at the LHC. We show how they can be studied systematically with the help of invertible neural networks. These networks work with sub-jet information to extract fundamental parameters from jet samples. Our approach expands the LEP measurements of QCD Casimirs to a systematic test of QCD properties based on low-level jet observables. Starting with an toy example we study the effect of the full shower, hadronization, and detector effects in detail.","PeriodicalId":8457,"journal":{"name":"arXiv: High Energy Physics - Phenomenology","volume":"155 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78514073","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: 29
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