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Acta Physica Polonica B, Proceedings Supplement最新文献

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The Tensor Pomeron and Low-(x) Deeply Virtual Compton Scattering 张量波密子和低(x)深虚康普顿散射
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-04-04 DOI: 10.5506/aphyspolbsupp.16.7-a15
P. Lebiedowicz, A. Szczurek, O. Nachtmann
{"title":"The Tensor Pomeron and Low-(x) Deeply Virtual Compton Scattering","authors":"P. Lebiedowicz, A. Szczurek, O. Nachtmann","doi":"10.5506/aphyspolbsupp.16.7-a15","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.7-a15","url":null,"abstract":"The two-tensor-pomeron model is applied to deeply virtual Compton scattering (DVCS) on a proton. A good description of the DVCS HERA data at small Bjorken-$x$ is achieved due to a sizeable interference of soft and hard pomeron contributions. We present two fits which differ somewhat in the strength of the hard pomeron contribution. We describe, in the same framework, both the low $Q^{2}$ and high $Q^{2}$ regimes and the transition between them. We find that the soft-pomeron contribution is considerable up to $Q^{2} sim 20$ GeV$^{2}$. The reggeon exchange term is particularly relevant for describing the scattering of a real photon on a proton measured at lower $gamma p$ energies at FNAL. We find that the ratio of $gamma^{*} p to gamma p$ cross-sections for longitudinally and transversely polarized virtual photons strongly increases with $t$. Our findings may be checked in future lepton-nucleon scattering experiments in the low-$x$ regime, for instance, at a future Electron-Ion Collider (EIC) at the BNL and LHeC at the LHC.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83281922","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
Gamow Shell Model Description of (^7)Li and Elastic Scattering Reaction (^4)He((^3)H,(^3)H)(^4)He (^7) Li与弹性散射反应的Gamow壳模型描述(^4) He((^3) H, (^3) H) (^4) He
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-04-02 DOI: 10.5506/APhysPolBSupp.16.4-A22
J. Fern'andez, M. Płoszajczak, N. Michel
{"title":"Gamow Shell Model Description of (^7)Li and Elastic Scattering Reaction (^4)He((^3)H,(^3)H)(^4)He","authors":"J. Fern'andez, M. Płoszajczak, N. Michel","doi":"10.5506/APhysPolBSupp.16.4-A22","DOIUrl":"https://doi.org/10.5506/APhysPolBSupp.16.4-A22","url":null,"abstract":"Spectrum of $^7$Li and elastic scattering reaction $^4$He($^3$H, $^3$H)$^4$He are studied using the unified description of the Gamow shell model in the coupled-channel formulation (GSMCC). The reaction channels are constructed using the cluster expansion with the two mass partitions [$^4$He + $^3$H], [$^6$Li + n].","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89228628","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
Neutrino Cooled Disk in Post-merger System Studied via Numerical GR MHD Simulation with a Composition-dependent Equation of State 基于组成相关状态方程的合并后系统中中微子冷却盘的数值GR MHD模拟研究
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-03-31 DOI: 10.5506/aphyspolbsupp.16.6-a6
A. Janiuk
{"title":"Neutrino Cooled Disk in Post-merger System Studied via Numerical GR MHD Simulation with a Composition-dependent Equation of State","authors":"A. Janiuk","doi":"10.5506/aphyspolbsupp.16.6-a6","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.6-a6","url":null,"abstract":"The code HARM_COOL, a conservative scheme for relativistic magnetohydrodynamics, is being developed in our group and works with a tabulated equation of state of dense matter. This EOS can be chosen and used during dynamical simulation, instead of the simple ideal gas one. In this case, the inversion scheme between the conserved and primitive variables is not a trivial task. In principle, the code needs to solve numerically five coupled non-linear equations at every time-step. The 5-D recovery schemes were originally implemented in HARM and worked accurately for a simple polytropic EOS which has an analytic form. Our current simulations support the composition-dependent EOS, formulated in terms of rest-mass density, temperature and electron fraction. In this proceeding, I discuss and compare several recovery schemes that have been included in our code. I also present and discuss their convergence tests. Finally, I show set of preliminary results of a numerical simulation, addressed to the post-merger system formed after the binary neutron stars (BNS) coalescence.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85731591","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
Small-(x) Quark and Gluon Helicity Contributions to the Proton Spin Puzzle 小的(x)夸克和胶子螺旋度对质子自旋谜题的贡献
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-03-30 DOI: 10.5506/aphyspolbsupp.16.7-a8
Y. Tawabutr
{"title":"Small-(x) Quark and Gluon Helicity Contributions to the Proton Spin Puzzle","authors":"Y. Tawabutr","doi":"10.5506/aphyspolbsupp.16.7-a8","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.7-a8","url":null,"abstract":"A small-$x$ helicity evolution has been derived in 2016-18 and received an important modification in 2022. This article discusses its general framework and summarizes the recent theoretical developments, including the asymptotic behaviors of helicity PDFs and $g_1$ structure function at small $x$. The latest fits to various polarized scattering data are also discussed. The results from this research program will provide important theoretical inputs for the future polarized small-$x$ measurements at the electron-ion collider (EIC).","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"194 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85494241","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
Diffractive Scattering at Next-to-leading Order in the Dipole Picture 偶极子图中次领先阶的衍射散射
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-03-28 DOI: 10.5506/aphyspolbsupp.16.7-a14
H. Mantysaari
{"title":"Diffractive Scattering at Next-to-leading Order in the Dipole Picture","authors":"H. Mantysaari","doi":"10.5506/aphyspolbsupp.16.7-a14","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.7-a14","url":null,"abstract":"We discuss recent developments towards next-to-leading order (NLO) accuracy in the dipole picture. We review recent NLO results for exclusive vector meson production and diffractive structure functions, and discuss how it is becoming possible to describe both inclusive and exclusive DIS data simultaneously within the Color Glass Condensate framework at NLO accuracy. These developments will make it possible to probe the gluon saturation phenomena in detail especially when nuclear-DIS data from the EIC become available.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87492647","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
Exclusive Heavy Vector Meson Photoproduction on Nuclei in NLO Perturbative QCD NLO微扰QCD中原子核上的独占重矢量介子光产生
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-03-22 DOI: 10.5506/aphyspolbsupp.16.7-a9
K. Eskola, V. Guzey, T. Loytainen, H. Paukkunen, C. Flett
{"title":"Exclusive Heavy Vector Meson Photoproduction on Nuclei in NLO Perturbative QCD","authors":"K. Eskola, V. Guzey, T. Loytainen, H. Paukkunen, C. Flett","doi":"10.5506/aphyspolbsupp.16.7-a9","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.7-a9","url":null,"abstract":"We make predictions for the cross section of coherent $J/psi$ photoproduction in Pb-Pb and O-O ultraperipheral collisions (UPCs) at the LHC as a function of the $J/psi$ rapidity $y$ in the framework of collinear factorization and next-to-leading order (NLO) perturbative QCD. We quantify the strong scale dependence and significant uncertainties due to nuclear PDFs and show that our approach provides a reasonable description of the LHC data on coherent $J/psi$ photoproduction in Pb-Pb UPCs. We demonstrate that these uncertainties are reduced by approximately a factor of 10 in the scaled ratio of the O-O and Pb-Pb UPC cross sections. Our analysis indicates the dominance of the quark contribution to the UPC cross section at central rapidities, which affects the interpretation of the UPC data.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85637120","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
Active Target TPC for Study of Photonuclear Reactions at Astrophysical Energies 用于天体物理能量下光核反应研究的主动靶TPC
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-03-13 DOI: 10.5506/aphyspolbsupp.16.4-a17
M. Kuich, M. Ćwiok, W. Dominik, A. Fijałkowska, M. Fila, A. Giska, Z. Janas, A. Kalinowski, K. Kierzkowski, C. Mazzocchi, W. Okli'nski, M. Zaremba, D. Grzkadziel, J. Lekki, W. Kr'olas, A. Kuli'nska, A. Kurowski, W. Janik, T. Pieprzyca, Z. Szklarz, M. Scholz, M. Turza'nski, U. Wikacek, U. Wo'znicka, A. Caciolli, M. Campostrini, V. Rigato, M. Gai, H. Fynbo
{"title":"Active Target TPC for Study of Photonuclear Reactions at Astrophysical Energies","authors":"M. Kuich, M. Ćwiok, W. Dominik, A. Fijałkowska, M. Fila, A. Giska, Z. Janas, A. Kalinowski, K. Kierzkowski, C. Mazzocchi, W. Okli'nski, M. Zaremba, D. Grzkadziel, J. Lekki, W. Kr'olas, A. Kuli'nska, A. Kurowski, W. Janik, T. Pieprzyca, Z. Szklarz, M. Scholz, M. Turza'nski, U. Wikacek, U. Wo'znicka, A. Caciolli, M. Campostrini, V. Rigato, M. Gai, H. Fynbo","doi":"10.5506/aphyspolbsupp.16.4-a17","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.4-a17","url":null,"abstract":"A setup designed to study photonuclear reactions at astrophysical energies - an active target Time Projection Chamber was developed and constructed at the Faculty of Physics, University of Warsaw. The device was successfully employed in two experiments at the Institute of Nuclear Physics Polish Academy of Sciences in Cracow, in which {gamma}- and neutron-induced reactions with CO2 gas target were measured. The reaction products were detected and their momenta reconstructed. Preliminary results are shown.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89530251","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
Inclusive and Diffractive Dijet Photoproduction at the Electron–Ion Collider in NLO QCD NLO QCD中电子-离子对撞机的包涵和衍射双射流光产生
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-03-09 DOI: 10.5506/aphyspolbsupp.16.7-a11
V. Guzey, M. Klasen
{"title":"Inclusive and Diffractive Dijet Photoproduction at the Electron–Ion Collider in NLO QCD","authors":"V. Guzey, M. Klasen","doi":"10.5506/aphyspolbsupp.16.7-a11","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.7-a11","url":null,"abstract":"In the framework of collinear factorization and next-to-leading order (NLO) perturbative QCD, we make predictions for inclusive and diffractive dijet photoproduction in electron-proton and electron-nucleus scattering in the EIC kinematics. We establish kinematic ranges in the ${bar p}_T$, ${bar eta}$, $x_A^{rm obs}$ and $x_{gamma}^{rm obs}$ variables, quantify sensitivity to small-$x$ nuclear PDFs, and analyze various scenarios of factorization breaking in the case of diffractive scattering.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88345267","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
Parton Distribution Functions for Discovery Physics at the LHC 大型强子对撞机发现物理的部分子分布函数
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-02-23 DOI: 10.5506/aphyspolbsupp.16.7-a10
A. Cooper-Sarkar
{"title":"Parton Distribution Functions for Discovery Physics at the LHC","authors":"A. Cooper-Sarkar","doi":"10.5506/aphyspolbsupp.16.7-a10","DOIUrl":"https://doi.org/10.5506/aphyspolbsupp.16.7-a10","url":null,"abstract":"At the LHC we are colliding protons, but it is not the protons that are doing the interacting. It is their constituents the quarks, antiquarks and gluons-collectively known as partons. We need to know how what fractional momentum of the proton each of these partons takes at the energy scale of LHC collisions, in order to understand LHC physics. Such parton momentum distributions are known as PDFs (Parton Distribution Functions) and are a field of study in their own right. However, it is now the case that the uncertainties on PDFs are a major contributor to the background to the discovery of physics Beyond the Standard Model (BSM). Firstly in searches at the highest energy scales of a few TeV and secondly in precision measurements of Standard Model (SM) parameters such as the mass of the W-boson, $m_W$, or the weak mixing angle, $sin^2theta_W$, which can provide indirect evidence for BSM physics in their deviations from SM values.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75125464","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
Manifestation of Pairing Modes in Nuclear Collisions 核碰撞中配对模式的表现
Acta Physica Polonica B, Proceedings Supplement Pub Date : 2023-02-22 DOI: 10.5506/APhysPolBSupp.16.4-A38
A. Makowski, M. Barton, P. Magierski, K. Sekizawa, Gabriel Wlazłowski
{"title":"Manifestation of Pairing Modes in Nuclear Collisions","authors":"A. Makowski, M. Barton, P. Magierski, K. Sekizawa, Gabriel Wlazłowski","doi":"10.5506/APhysPolBSupp.16.4-A38","DOIUrl":"https://doi.org/10.5506/APhysPolBSupp.16.4-A38","url":null,"abstract":"We discuss the possible manifestation of pairing dynamics in nuclear collisions beyond the standard quasi-static treatment of pairing correlations. These involve solitonic excitations induced by pairing phase difference of colliding nuclei and pairing dynamic enhancement in the di-nuclear system formed by merging nuclei.","PeriodicalId":39158,"journal":{"name":"Acta Physica Polonica B, Proceedings Supplement","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81622246","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
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