arXiv - PHYS - Nuclear Theory最新文献_第3页

Fuzzy logic for reconstructing arbitrary moments of multiplicity distributions 重构多重性分布任意矩的模糊逻辑

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-15 DOI: arxiv-2409.09814

Anar Rustamov

{"title":"Fuzzy logic for reconstructing arbitrary moments of multiplicity distributions","authors":"Anar Rustamov","doi":"arxiv-2409.09814","DOIUrl":"https://doi.org/arxiv-2409.09814","url":null,"abstract":"The Identity Method is a statistical technique developed to reconstruct\u0000moments of multiplicity distributions of particles produced in high-energy\u0000nuclear collisions. The method leverages principles from fuzzy logic, allowing\u0000for a more nuanced representation of particle identification by assigning\u0000degrees of membership to different particle types based on detector signals. In\u0000this contribution, a mathematical framework, based on a multivariate moment\u0000generation function, is developed that allows the derivation of the formulas\u0000used in the Identity Method in a more robust way. Moreover, within the\u0000introduced framework, the Identity Method is easily extended to cope with\u0000arbitrarily higher-order moments. The techniques developed here offer\u0000significant potential for improving the accuracy of multiplicity distribution\u0000analyses in high-energy nuclear collisions. While the primary focus of the work\u0000presented is on applications in high-energy and nuclear physics, it can also be\u0000applied in other areas where signal identification is probabilistic and data\u0000are noisy, such as medical imaging, remote sensing, and various other fields of\u0000experimental science.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263017","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

The Current State of the Controversy over Screening in Nuclear Reactions 核反应中筛选问题的争议现状

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-15 DOI: arxiv-2409.09826

Werner Däppen

引用次数: 0

Ab initio calculation of the $^3$He$(α,γ)^7$Be astrophysical S factor with chiral two- and three-nucleon forces 利用手性二核子和三核子力对 $^3$He$(α,γ)^7$Be 天体 S 因子的 Ab initio 计算

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-14 DOI: arxiv-2409.09515

M. C. Atkinson, K. Kravvaris, S. Quaglioni, P. Navrátil

{"title":"Ab initio calculation of the $^3$He$(α,γ)^7$Be astrophysical S factor with chiral two- and three-nucleon forces","authors":"M. C. Atkinson, K. Kravvaris, S. Quaglioni, P. Navrátil","doi":"arxiv-2409.09515","DOIUrl":"https://doi.org/arxiv-2409.09515","url":null,"abstract":"The $^3$He$(alpha,gamma)^7$Be radiative capture reaction plays a key role\u0000in the creation of elements in stars as well as in the production of solar\u0000neutrinos, the observation of which is one of the main tools to study the\u0000properties of our sun. Since accurate experimental measurements of this fusion\u0000cross section at solar energies are difficult due to the strong Coulomb\u0000repulsion between the reactants, the onus falls on theory to provide a robust\u0000means for extrapolating from the region where experimental data is available\u0000down to the desired astrophysical regime. We present the first microscopic\u0000calculations of $^3$He$(alpha,gamma)^7$Be with explicit inclusion of\u0000three-nucleon forces. Our prediction of the astrophysical $S$ factor\u0000qualitatively agrees with experimental data. We further incorporate\u0000experimental bound-state and scattering information in our calculation to\u0000arrive at a more quantitative description. This process reveals that our\u0000current model lacks sufficient repulsion in the $1/2^+$ channel of our model\u0000space to simultaneously reproduce elastic-scattering data. This deficit\u0000suggests that $^3$He$(alpha,gamma)^7$Be probes aspects of the nuclear force\u0000that are not currently well-constrained.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269882","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

N$^{mathbf{3}}$LL + $mathcal{O}(α_s^2)$ predictions of lepton-jet azimuthal angular distribution in deep-inelastic scattering N$^{mathbf{3}}$LL + $mathcal{O}(α_s^2)$ 预测深弹性散射中轻子射流的方位角分布

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-14 DOI: arxiv-2409.09248

Shen Fang, Mei-Sen Gao, Hai Tao Li, Ding Yu Shao

{"title":"N$^{mathbf{3}}$LL + $mathcal{O}(α_s^2)$ predictions of lepton-jet azimuthal angular distribution in deep-inelastic scattering","authors":"Shen Fang, Mei-Sen Gao, Hai Tao Li, Ding Yu Shao","doi":"arxiv-2409.09248","DOIUrl":"https://doi.org/arxiv-2409.09248","url":null,"abstract":"We present an analysis of lepton-jet azimuthal decorrelation in\u0000deep-inelastic scattering (DIS) at next-to-next-to-next-to-leading logarithmic\u0000(N$^{3}$LL) accuracy, combined with fixed-order corrections at\u0000$mathcal{O}(alpha_s^2)$. In this study, jets are defined in the lab frame\u0000using the anti-$k_T$ clustering algorithm and the winner-take-all recombination\u0000scheme. The N$^{3}$LL resummation results are derived from the\u0000transverse-momentum dependent factorization formula within the soft-collinear\u0000effective theory, while the $mathcal{O}(alpha_s^2)$ fixed-order matching\u0000distribution is calculated using the {tt NLOJET++} event generator. The\u0000azimuthal decorrelation between the jet and electron serves as a critical probe\u0000of the three-dimensional structure of the nucleon. Our numerical predictions\u0000provide a robust framework for precision studies of QCD and the nucleon's\u0000internal structure through jet observables in DIS. These results are\u0000particularly significant for analyses involving jets in HERA data and the\u0000forthcoming electron-ion collider experiments.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263023","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

Effect of Magnetic Fields on Urca Rates in Neutron Star Mergers 磁场对中子星合并中乌卡率的影响

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-14 DOI: arxiv-2409.09423

Pranjal Tambe, Debarati Chatterjee, Mark Alford, Alexander Haber

引用次数: 0

Pion-nucleon scattering with decuplet contribution in heavy baryon SU(3) chiral perturbation theory 重重子SU(3)手性扰动理论中带有十亿分之一贡献的质子-核子散射

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-14 DOI: arxiv-2409.09388

Jing Ou-Yang, Bo-Lin Huang

引用次数: 0

Multiple-models prediction for light neutron-rich isotopes cross section by $Q_g$ systematics in $^{40}$Ar projectile fragmentation reactions ^{40}$Ar射弹碎裂反应中Q_g$系统学对轻中子富同位素截面的多模型预测

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-14 DOI: arxiv-2409.09367

X. B. Wei, H. L. Wei, C. W. Ma, C. Y. Qiao, Y. F. Guo, J. Pu, K. X. Cheng, Y. T. Wang, Z. X. Wang, T. R. Zhou, D. Peng, S. T. Wang, S. W. Tang, Y. H. Yu, X. H. Zhang, Y. Z. Sun, S. Y. Jin, G. L. Zhang, X. Jiang, Z. Y. Li, Y. F. Xu, F. H. Lu, T. Q. Liu

{"title":"Multiple-models prediction for light neutron-rich isotopes cross section by $Q_g$ systematics in $^{40}$Ar projectile fragmentation reactions","authors":"X. B. Wei, H. L. Wei, C. W. Ma, C. Y. Qiao, Y. F. Guo, J. Pu, K. X. Cheng, Y. T. Wang, Z. X. Wang, T. R. Zhou, D. Peng, S. T. Wang, S. W. Tang, Y. H. Yu, X. H. Zhang, Y. Z. Sun, S. Y. Jin, G. L. Zhang, X. Jiang, Z. Y. Li, Y. F. Xu, F. H. Lu, T. Q. Liu","doi":"arxiv-2409.09367","DOIUrl":"https://doi.org/arxiv-2409.09367","url":null,"abstract":"Precise predictions for nuclei near drip lines are crucial for experiments in\u0000new generation of rare isotope facilities. A multi-models investigation of the\u0000$Q_g$ systematics for fragments production cross sections, with $Q_g$ defined\u0000as the difference of mass excess (ME) between the projectile ($Z_{p}, A_{p}$)\u0000and the fragment ($Z_{f}, A_{f}$) nuclei $Q_{g}=ME(Z_{p}, A_{p})-ME(Z_{f},\u0000A_{f})$, has been performed to verify the model prediction abilities for light\u0000neutron-rich isotopes in measured $^{40}$Ar + $^9$Be projectile fragmentation\u0000reactions from 57$A$ MeV to 1$A$ GeV. The models used are the FRACS\u0000parametrizations and the newly developed Bayesian neural networks (BNN) model.\u0000%method The results show that FRACS, BNN, and $Q_g$ extrapolations are\u0000generally consistent, except for fragments near the nuclear mass of the\u0000projectile. Additionally, both measured data and model extrapolations provide\u0000evidence for a shell closure at $N=$ 16 in fluorine and neon, as well as the\u0000disappearance of the traditional magic number $N=$ 20 in neon, sodium and\u0000magnesium.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263064","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

Optical model potentials for deuteron scattering off $^{24}$Mg, $^{28}$Si, $^{58}$Ni, $^{90}$Zr, $^{116}$Sn, and $^{208}$Pb at $sim$100 MeV/nucleon 氘核在 $^{24}$Mg, $^{28}$Si, $^{58}$Ni, $^{90}$Zr, $^{116}$Sn 和 $^{208}$Pb 以 $sim$100 MeV/nucleon 发生散射时的光学模型电位

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-13 DOI: arxiv-2409.08517

D. Patel, D. C. Cuong, K. B. Howard, U. Garg, Dao T. Khoa, H. Akimune, G. P. A. Berg, M. Fujiwara, M. N. Harakeh, M. Itoh, C. Iwamoto, T. Kawabata, K. Kawase, J. T. Matta, T. Murakami, M. Yosoi

{"title":"Optical model potentials for deuteron scattering off $^{24}$Mg, $^{28}$Si, $^{58}$Ni, $^{90}$Zr, $^{116}$Sn, and $^{208}$Pb at $sim$100 MeV/nucleon","authors":"D. Patel, D. C. Cuong, K. B. Howard, U. Garg, Dao T. Khoa, H. Akimune, G. P. A. Berg, M. Fujiwara, M. N. Harakeh, M. Itoh, C. Iwamoto, T. Kawabata, K. Kawase, J. T. Matta, T. Murakami, M. Yosoi","doi":"arxiv-2409.08517","DOIUrl":"https://doi.org/arxiv-2409.08517","url":null,"abstract":"Angular distributions of the elastic and inelastic deuteron-nucleus\u0000scattering off $^{24}$Mg, $^{28}$Si, $^{58}$Ni, $^{90}$Zr, $^{116}$Sn, and\u0000$^{208}$Pb have been measured at a beam energy of 98 MeV/nucleon, with the goal\u0000of constraining the deuteron optical potential in this kinematical regime, and\u0000to extract the reduced transition probabilities for the ground-state\u0000transitions to low-lying excited states of these nuclei. Two potential models\u0000were used in the analysis of the measured $(d,d)$ and $(d,d')$ data within the\u0000optical model and the distorted-wave Born approximation: the phenomenological\u0000optical model potential associated with the collective model of nuclear\u0000scattering, and the semi-microscopic double-folding model of the\u0000deuteron-nucleus potential based on a realistic density-dependent M3Y\u0000interaction. The deuteron optical potential and inelastic $(d,d')$ scattering\u0000form factors were calculated using these two potential models, allowing for a\u0000direct comparison between the potential models as well as the validation of the\u0000deduced $Elambda$ transition rates.","PeriodicalId":501573,"journal":{"name":"arXiv - PHYS - Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269884","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

Heavy flavor angular correlations as a direct probe of the glasma 重味角相关性是对等离子体的直接探测

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-13 DOI: arxiv-2409.10565

Dana Avramescu, Vincenzo Greco, Tuomas Lappi, Heikki Mäntysaari, David Müller

引用次数: 0

Domain-wall Skyrmion phase of QCD in magnetic field: Gauge field dynamics 磁场中 QCD 的域壁 Skyrmion 相：量子场动力学

arXiv - PHYS - Nuclear Theory Pub Date : 2024-09-13 DOI: arxiv-2409.08841

Yuki Amari, Minoru Eto, Muneto Nitta

引用次数: 0