The European Physical Journal A最新文献_第7页

Analysis of the resonance X(4630) at non-zero temperature 非零温度下的共振 X(4630) 分析

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-18 DOI: 10.1140/epja/s10050-024-01405-4

G. Bozkır

{"title":"Analysis of the resonance X(4630) at non-zero temperature","authors":"G. Bozkır","doi":"10.1140/epja/s10050-024-01405-4","DOIUrl":"10.1140/epja/s10050-024-01405-4","url":null,"abstract":"<div>We calculate the spectroscopic parameters of resonance X(4630) observed in the process (B^{+}rightarrow J/Psi phi K^{+}) by at the LHCb experiments at CERN by means of thermal QCD sum rule method at non-zero temperature. The exotic vector X(4630) is assigned as the diquark–antidiquark state ([cs][overline{cs}]) with spin-parity (J^{PC}=1^{-+}). Employing the two-point QCD sum rule approach up to the sixth order of the operator dimension by including non-perturbative contribution, we calculate the mass and decay constant of X(4630) at (Tne 0). The numerical analyses demonstrate that the values of the mass and decay constant of X(4630) near the deconfinement temperature decrease up to (9.8%) and (60%) of their vacuum values. At (Trightarrow 0), the obtained results for the mass (m_{X(4630)}=(4649pm 40)) MeV and decay constant (lambda _{X(4630)}=(10.07pm 0.8)times 10^{-3} ) MeV are in excellent agreement with the results reported by LHCb experiments and other theoretical predictions.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01405-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Half-lives of one-proton emitters using Effective Liquid Drop Model 利用有效液滴模型计算一质子发射器的半衰期

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-17 DOI: 10.1140/epja/s10050-024-01412-5

Nithu Ashok, K. M. Ashiq, K. P. Santhosh

引用次数: 0

The nuclear many-body problem 核多体问题

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-16 DOI: 10.1140/epja/s10050-024-01384-6

David Blaschke, Hisashi Horiuchi, Peter Ring, Gerd Röpke

引用次数: 0

Quantum vortices in fermionic superfluids: from ultracold atoms to neutron stars. 费米子超流体中的量子漩涡：从超冷原子到中子星。

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-16 DOI: 10.1140/epja/s10050-024-01378-4

Piotr Magierski, Andrea Barresi, Andrzej Makowski, Daniel Pcak, Gabriel Wlazłowski

引用次数: 0

Scissors mode in transuranium elements 跨铀元素的剪刀模式

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-16 DOI: 10.1140/epja/s10050-024-01386-4

E. B. Balbutsev, I. V. Molodtsova

引用次数: 0

The ( ^{19})N(n,(gamma )^{20})N capture rate in light of the probable bubble nature of ( ^{20})N 考虑到 $$ ^{20}$ N 的可能泡沫性质，N(n, $$gamma )^{20}$ N 的捕获率为 $$ ^{19}$ N(n, $$gamma )^{20}$

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-16 DOI: 10.1140/epja/s10050-024-01407-2

V. Choudhary, M. Dan, R. Chatterjee, M. Kimura, W. Horiuchi, Shubhchintak, G. Singh

引用次数: 0

Tensor factorization in ab initio many-body calculations 多体计算中的张量因子化

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-14 DOI: 10.1140/epja/s10050-024-01397-1

M. Frosini, T. Duguet, P. Tamagno

{"title":"Tensor factorization in ab initio many-body calculations","authors":"M. Frosini, T. Duguet, P. Tamagno","doi":"10.1140/epja/s10050-024-01397-1","DOIUrl":"10.1140/epja/s10050-024-01397-1","url":null,"abstract":"<div>Whether for fundamental studies or nuclear data evaluations, first-principle calculations of atomic nuclei constitute the path forward. Today, performing ab initio calculations (a) of heavy nuclei, (b) of doubly open-shell nuclei or (c) with a sub-percent accuracy is at the forefront of nuclear structure theory. While combining any two of these features constitutes a major challenge, addressing the three at the same time is currently impossible. From a numerical standpoint, these challenges relate to the necessity to handle (i) very large single-particle bases and (ii) mode-6, i.e. three-body, tensors (iii) that must be stored repeatedly. Performing second-order many-body perturbation theory(ies) calculations based on triaxially deformed and superfluid reference states of doubly open-shell nuclei up to mass (A=72), the present work achieves a significant step forward by addressing challenge (i). To do so, the memory and computational cost associated with the handling of large tensors is scaled down via the use of tensor factorization techniques. The presently used factorization format is based on a randomized singular value decomposition that does not require the computation and storage of the very large initial tensor. The procedure delivers an inexpensive and controllable approximation to the original problem, as presently illustrated for calculations that could not be performed without tensor factorization. With the presently developed technology at hand, one can envision to perform calculations of yet heavier doubly open-shell nuclei at sub-percent accuracy in a foreseeable future.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixture density network in evaluating incomplete fission mass yields 评估不完全裂变质量当量的混合物密度网络

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-12 DOI: 10.1140/epja/s10050-024-01409-0

Vasilis Tsioulos, Vaia Prassa

引用次数: 0

Lifetimes of excited states in (^{16})C as a benchmark for ab initio developments 以 $$^{16}$ C 中激发态的寿命作为 ab initio 发展的基准

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-12 DOI: 10.1140/epja/s10050-024-01396-2

M. Mathy, M. Petri, R. Roth, L. Wagner, S. Heil, A. D. Ayangeakaa, S. Bottoni, M. P. Carpenter, H. L. Crawford, P. Fallon, J. Elson, J. Kinnison, T. Lauritsen, I.-Y. Lee, A. O. Macchiavelli, S. Paschalis, W. Reviol, D. G. Sarantites, I. Syndikus, S. L. Tabor, M. Wiedeking, S. Zhu

{"title":"Lifetimes of excited states in (^{16})C as a benchmark for ab initio developments","authors":"M. Mathy, M. Petri, R. Roth, L. Wagner, S. Heil, A. D. Ayangeakaa, S. Bottoni, M. P. Carpenter, H. L. Crawford, P. Fallon, J. Elson, J. Kinnison, T. Lauritsen, I.-Y. Lee, A. O. Macchiavelli, S. Paschalis, W. Reviol, D. G. Sarantites, I. Syndikus, S. L. Tabor, M. Wiedeking, S. Zhu","doi":"10.1140/epja/s10050-024-01396-2","DOIUrl":"10.1140/epja/s10050-024-01396-2","url":null,"abstract":"<div>Lifetimes of higher-lying states ((2_2^+) and (4_1^+)) in (^{16})C have been measured, employing the Gammasphere and Microball detector arrays, as key observables to test and refine ab initio calculations based on interactions developed within chiral Effective Field Theory. The presented experimental constraints to these lifetimes of (tau ({2_2^+}) = [,244, 446],~textrm{fs}) and (tau ({4_1^+}) = [,1.8, 4],~textrm{ps}), combined with previous results on the lifetime of the (2_1^+) state of (^{16})C, provide a rather complete set of key observables to benchmark the theoretical developments. We present No-Core Shell-Model calculations using state-of-the-art chiral 2- (NN) and 3-nucleon (3N) interactions at next-to-next-to-next-to-leading order for both the NN and the 3N contributions and a generalized natural-orbital basis (instead of the conventional harmonic-oscillator single-particle basis) which reproduce, for the first time, the experimental findings remarkably well. The level of agreement of the new calculations as compared to the CD-Bonn meson-exchange NN interaction is notable and presents a critical benchmark for theory.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01396-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Astrophysical S-factors for complete fusion reactions (^{12,13}textrm{C},+,^{12,13})C 完全聚变反应的天体物理 S 因子 $$^{12,13}textrm{C},+,^{12,13}$$ C

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-09-11 DOI: 10.1140/epja/s10050-024-01406-3

V. V. Sargsyan, G. G. Adamian, N. V. Antonenko

引用次数: 0