Physics Letters B最新文献_第9页

The gallium solar neutrino capture cross section revisited

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2025.139259

W.C. Haxton , Evan Rule

{"title":"The gallium solar neutrino capture cross section revisited","authors":"W.C. Haxton , Evan Rule","doi":"10.1016/j.physletb.2025.139259","DOIUrl":"10.1016/j.physletb.2025.139259","url":null,"abstract":"<div><div>Solar neutrino flux constraints from the legacy GALLEX/GNO and SAGE experiments continue to influence contemporary global analyses of neutrino properties. The constraints depend on the neutrino absorption cross sections for various solar sources. Following recent work updating the <sup>51</sup>Cr and <sup>37</sup>Ar neutrino source cross sections, we reevaluate the <sup>71</sup>Ga solar neutrino cross sections, focusing on contributions from transitions to <sup>71</sup>Ge excited states, but also revising the ground-state transition to take into account new <sup>71</sup>Ge electron-capture lifetime measurements and various theory corrections. The excited-state contributions have been traditionally taken from forward-angle <span><math><mo>(</mo><mi>p</mi><mo>,</mo><mi>n</mi><mo>)</mo></math></span> cross sections. Here we correct this procedure for the <span><math><mo>≈</mo><mn>10</mn><mtext>%</mtext></math></span>–20% tensor operator contribution that alters the relationship between Gamow-Teller and <span><math><mo>(</mo><mi>p</mi><mo>,</mo><mi>n</mi><mo>)</mo></math></span> transition strengths. Using state-of-the-art nuclear shell-model calculations to evaluate this correction, we find that it lowers the <sup>8</sup>B and hep neutrino cross sections. However, the addition of other corrections, including contributions from near-threshold continuum states that radiatively decay, leads to an overall increase in the <sup>8</sup>B and hep cross sections of <span><math><mo>≈</mo><mn>10</mn><mtext>%</mtext></math></span> relative to the values recommended by Bahcall. Uncertainties are propagated using Monte Carlo simulations.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"861 ","pages":"Article 139259"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143035298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

On constraints of the (β-deformed) partition functions with W-representations

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2025.139286

Yu-Sen Zhu , Ren Cuo Ji , Min-Li Li , Rui Wang

引用次数: 0

Measurement of inclusive and differential cross sections for W+W− production in proton-proton collisions at s=13.6 TeV TeV下质子-质子碰撞W+W−产生的包含截面和微分截面的测量

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2024.139231

{"title":"Measurement of inclusive and differential cross sections for W+W− production in proton-proton collisions at s=13.6 TeV","authors":"","doi":"10.1016/j.physletb.2024.139231","DOIUrl":"10.1016/j.physletb.2024.139231","url":null,"abstract":"<div><div>Measurements at <span><math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13.6</mn><mspace></mspace><mtext>TeV</mtext></math></span> of the opposite-sign W boson pair production cross section in proton-proton collisions are presented. The data used in this study were collected with the CMS detector at the CERN LHC in 2022, and correspond to an integrated luminosity of 34.8<span><math><mspace></mspace><msup><mrow><mtext>fb</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>. Events are selected by requiring one electron and one muon of opposite charge. A maximum likelihood fit is performed on signal- and background-enriched data categories defined by the flavor and charge of the leptons, the number of jets, and number of jets originating from b quarks. The overall sensitivity is significantly better than that of previous results with a similar integrated luminosity. The improvement comes from a more refined control of experimental uncertainties and an improved fit strategy. An inclusive <span><math><msup><mrow><mi>W</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>W</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> production cross section of <span><math><mn>125.7</mn><mo>±</mo><mn>5.6</mn></math></span> pb is measured, in agreement with standard model predictions. Cross sections are also reported in a fiducial region close to that of the detector acceptance, both inclusively and differentially, as a function of the jet multiplicity in the event. For the first time in proton-proton collisions, <span><math><mi>W</mi><mi>W</mi></math></span> events with zero, one, and at least two jets are studied simultaneously and compared with recent theoretical predictions.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"861 ","pages":"Article 139231"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142967782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Polarization of thermal dilepton radiation

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2025.139267

Florian Seck , Bengt Friman , Tetyana Galatyuk , Hendrik van Hees , Ralf Rapp , Enrico Speranza , Jochen Wambach

{"title":"Polarization of thermal dilepton radiation","authors":"Florian Seck , Bengt Friman , Tetyana Galatyuk , Hendrik van Hees , Ralf Rapp , Enrico Speranza , Jochen Wambach","doi":"10.1016/j.physletb.2025.139267","DOIUrl":"10.1016/j.physletb.2025.139267","url":null,"abstract":"<div><div>The invariant mass spectra of dileptons radiated from the fireballs formed in high-energy heavy-ion collisions have been successfully used to investigate the properties of hot and dense QCD matter. Using a realistic model for the in-medium electromagnetic spectral function, we predict polarization observables and compare them to experiment. This allows, for the first time, independent tests of the longitudinal and transverse components of the virtual photon's selfenergy. While the low- and high-mass regions exhibit the expected limits of transverse and unpolarized photons, respectively, baryon-driven medium effects in the <em>ρ</em>-meson mass region create a marked longitudinal polarization that transits into a largely unpolarized emission from the quark-gluon plasma, thus providing a sensitive test of microscopic emission processes in QCD matter. Applications to available data from the HADES and NA60 experiments at SIS and SPS energies, respectively, are consistent with our predictions and set the stage for quantitative polarization studies at FAIR and collider energies.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"861 ","pages":"Article 139267"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143035234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A simple parametrisation of the pion form factor

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2025.139266

Matthew Kirk , Bastian Kubis , Méril Reboud , Danny van Dyk

{"title":"A simple parametrisation of the pion form factor","authors":"Matthew Kirk , Bastian Kubis , Méril Reboud , Danny van Dyk","doi":"10.1016/j.physletb.2025.139266","DOIUrl":"10.1016/j.physletb.2025.139266","url":null,"abstract":"<div><div>We discuss a novel and simple parametrisation of the pion vector form factor that transparently connects spacelike and timelike regions of the momentum transfer <span><math><msup><mrow><mi>q</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>. Our parametrisation employs the framework of conformal mapping and respects the known analyticity properties of the form factor, accounting explicitly for the <span><math><mi>ρ</mi><mo>(</mo><mn>770</mn><mo>)</mo></math></span>-meson pole. The parametrisation manifestly fulfils the normalisation condition at <span><math><msup><mrow><mi>q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>=</mo><mn>0</mn></math></span> as well as further restrictions at the pion production threshold and in the limit <span><math><mo>|</mo><msup><mrow><mi>q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>|</mo><mo>→</mo><mo>∞</mo></math></span>. In contrast to the widely used Omnès parametrisation, our approach does not use the pion–pion scattering phase shift as input. We confront the parametrisation with experimental data from <em>πH</em> scattering and <span><math><msup><mrow><mi>τ</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup><mi>ν</mi></math></span> decay. We already find a good description of the data with only five free parameters, which include the pole mass and decay width of the <span><math><mi>ρ</mi><mo>(</mo><mn>770</mn><mo>)</mo></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"861 ","pages":"Article 139266"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143035235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Unitarization of the one-loop graviton-graviton scattering amplitudes and study of the graviball

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2025.139275

J.A. Oller , Marcela Peláez

{"title":"Unitarization of the one-loop graviton-graviton scattering amplitudes and study of the graviball","authors":"J.A. Oller , Marcela Peláez","doi":"10.1016/j.physletb.2025.139275","DOIUrl":"10.1016/j.physletb.2025.139275","url":null,"abstract":"<div><div>From the graviton-graviton scattering amplitudes calculated perturbatively in quantum gravity to the one-loop order, we develop further a formalism that allows one to calculate infrared-finite partial-wave amplitudes fulfilling perturbative unitarity. As a result of this process a parameter dubbed <span><math><mi>ln</mi><mo>⁡</mo><mi>a</mi></math></span> emerges that separate between infrared and typical external momenta. The resulting partial-wave amplitudes are next unitarized by employing the Inverse Amplitude Method and the algebraic-<span><math><mi>N</mi><mo>/</mo><mi>D</mi></math></span> method. Then, the graviball resonance, with a similar pole position, is confirmed in the <em>S</em>-wave partial-wave amplitude for all unitarization methods, also with respect to the unitarization of only the leading-order amplitude. Although the spectrum of the theory is independent of the specific value of <span><math><mi>ln</mi><mo>⁡</mo><mi>a</mi></math></span>, the requirement for a well-behaved unitarized effective field theory of gravity identifies the optimal range of <span><math><mi>ln</mi><mo>⁡</mo><mi>a</mi></math></span> for our next-to-leading-order calculations as <span><math><mn>0.5</mn><mo>≲</mo><mi>ln</mi><mo>⁡</mo><mi>a</mi><mo>≲</mo><mn>1.7</mn></math></span>. Briefly, we discuss the <em>D</em>-wave scattering that is weaker than the <em>S</em>-wave scattering, repulsive and non-resonant for <span><math><mi>ln</mi><mo>⁡</mo><mi>a</mi><mo>≈</mo><mn>1</mn></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"861 ","pages":"Article 139275"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143035242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Right-handed interactions in puzzling B-decays

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2025.139285

Damir Bečirević , Svjetlana Fajfer , Nejc Košnik , Lovre Pavičić

引用次数: 0

Connecting quasi-normal modes with causality in Lovelock theories of gravity 洛夫洛克引力理论中准正模与因果关系的联系

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2024.139219

Avijit Chowdhury , Akash K. Mishra , Sumanta Chakraborty

引用次数: 0

Evolution of interior entropy of a loop quantum-corrected black hole pierced by a cosmic string 被宇宙弦穿透的环形量子修正黑洞内部熵的演化

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2024.139237

Wei Zhang

引用次数: 0

On the realization of infinite (continuous) spin field representations in AdS4 space AdS4空间中无限（连续）自旋场表示的实现

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-01 DOI: 10.1016/j.physletb.2024.139226

I.L. Buchbinder , S.A. Fedoruk , A.P. Isaev , M.A. Podoinitsyn

{"title":"On the realization of infinite (continuous) spin field representations in AdS4 space","authors":"I.L. Buchbinder , S.A. Fedoruk , A.P. Isaev , M.A. Podoinitsyn","doi":"10.1016/j.physletb.2024.139226","DOIUrl":"10.1016/j.physletb.2024.139226","url":null,"abstract":"<div><div>We study the symmetry properties of infinite spin fields in <span><math><mi>Ad</mi><msub><mrow><mi>S</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> space which are involved in the Lagrangian model proposed in <span><span><span>arXiv:2403.14446 [hep-th]</span></span><svg><path></path></svg></span> where the main role is played by operator constraints. It is shown that the conditions defining infinite spin states in <span><math><mi>Ad</mi><msub><mrow><mi>S</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> space are <span><math><mrow><mi>SO</mi></mrow><mo>(</mo><mn>2</mn><mo>,</mo><mn>3</mn><mo>)</mo></math></span>-invariant. It is found that in the model under consideration the Casimir operators are completely fixed by the constraint operators and only one of the Casimir operators is independent. It is shown that in this model, infinite spin fields in <span><math><mi>Ad</mi><msub><mrow><mi>S</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> space are described by the most degenerate representations of the <span><math><mrow><mi>SO</mi></mrow><mo>(</mo><mn>2</mn><mo>,</mo><mn>3</mn><mo>)</mo></math></span> group.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"861 ","pages":"Article 139226"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142967783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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