The European Physical Journal C最新文献_第3页

Measurement of the W-boson angular coefficients and transverse momentum in (p!p) collisions at (sqrt{s}=13) TeV with the ATLAS detector 用ATLAS探测器测量(sqrt{s}=13) TeV下(p!p)碰撞中w -玻色子角系数和横向动量

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-06 DOI: 10.1140/epjc/s10052-025-15264-w

ATLAS Collaboration

{"title":"Measurement of the W-boson angular coefficients and transverse momentum in (p!p) collisions at (sqrt{s}=13) TeV with the ATLAS detector","authors":"ATLAS Collaboration","doi":"10.1140/epjc/s10052-025-15264-w","DOIUrl":"10.1140/epjc/s10052-025-15264-w","url":null,"abstract":"<div>The angular distributions of Drell–Yan lepton pairs provide sensitive probes of the underlying dynamics of quantum chromodynamics (QCD) effects in vector-boson production. This paper presents for the first time the measurement of the full set of angular coefficients together with the differential cross-section as a function of the transverse momentum of the W boson, in the full phase space of the decay leptons. The measurements are performed separately for the (W^-) and (W^+) channels. The analysis uses proton–proton collision data recorded by the ATLAS experiment at the Large Hadron Collider in 2017 and 2018, during special low-luminosity runs with a reduced number of interactions per bunch crossings (pile-up). The data correspond to an integrated luminosity of 338 pb(^{-1}) at a centre-of-mass energy of (sqrt{s} = 13) TeV. The low pile-up environment provides excellent experimental conditions for high-precision measurements of W-boson production. All results agree with theoretical predictions incorporating finite-order QCD corrections up to order (alpha _S^2). \u0000\u0000\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 5","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-15264-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829167","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

Dirac sources for nonmetricity and torsion in metric-affine gravity 度量仿射引力中非规性和扭转的狄拉克源

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-06 DOI: 10.1140/epjc/s10052-026-15696-y

James T. Wheeler

引用次数: 0

Half-BPS impurity backgrounds and supersymmetry 半bps杂质背景和超对称

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-06 DOI: 10.1140/epjc/s10052-026-15714-z

D. Bazeia, A. C. Lehum

{"title":"Half-BPS impurity backgrounds and supersymmetry","authors":"D. Bazeia, A. C. Lehum","doi":"10.1140/epjc/s10052-026-15714-z","DOIUrl":"10.1140/epjc/s10052-026-15714-z","url":null,"abstract":"<div>We develop a rigid (mathcal {N}=(1,1)) superspace framework for spatially inhomogeneous impurity deformations in (D=1+1) dimensions by embedding the impurity profile into a real background superfield (spurion). This spurionic completion provides a manifestly supersymmetric description at the level of the action and offers a systematic route to identify which inhomogeneous backgrounds preserve a nontrivial subset of supercharges. Focusing on static interface-type configurations, we determine the half-BPS condition on the spurion background and the corresponding supersymmetry projector. In the resulting half-BPS sector we derive the associated first-order BPS equation for static bosonic matter configurations and establish an exact Bogomol’nyi completion of the static energy, yielding a sharp bound saturated by BPS solutions. We further comment on how explicit coordinate dependence and derivative-dependent impurity couplings can obstruct the Bogomol’nyi structure, thereby motivating spurionic extensions that retain supersymmetric control over inhomogeneous deformations.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 5","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-15714-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829638","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

Precise measurement of the (tbar{t}) production cross-section and lepton differential distributions in ( emu ) dilepton events from (sqrt{s}=13,text {TeV}) pp collisions with the ATLAS detector 用ATLAS探测器精确测量(sqrt{s}=13,text {TeV}) pp碰撞中( emu )双轻子事件(tbar{t})产生横截面和轻子微分分布

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15311-0

ATLAS Collaboration

{"title":"Precise measurement of the (tbar{t}) production cross-section and lepton differential distributions in ( emu ) dilepton events from (sqrt{s}=13,text {TeV}) pp collisions with the ATLAS detector","authors":"ATLAS Collaboration","doi":"10.1140/epjc/s10052-026-15311-0","DOIUrl":"10.1140/epjc/s10052-026-15311-0","url":null,"abstract":"<div>The inclusive top quark pair ((tbar{t})) cross-section (sigma _{tbar{t}}) has been measured in proton–proton collisions at (sqrt{s}=13,text {TeV}), using (140,{text {fb}^{-1}} ) of data collected by the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge (emu ) pair and b-tagged jets, the cross-section is measured to be: <div><div>$$begin{aligned} sigma _{tbar{t}} & = 829.3pm 1.3,mathrm {(stat)} pm 8.0,mathrm {(syst)} pm 7.3,mathrm {(lumi)} & quad pm 1.9,mathrm {(beam)},textrm{pb}, end{aligned}$$</div></div>where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the proton beam energy, giving a total uncertainty of 1.3%. The result is used to determine the top quark pole mass via the dependence of the predicted cross-section on ({m_{t}^textrm{pole}}), giving ({m_{t}^textrm{pole}}=172.8^{+1.5}_{-1.7}) (text {GeV}). The same event sample is used to measure absolute and normalised differential cross-sections for the (tbar{t} rightarrow emu nu bar{nu }bbar{b} ) process as a function of single-lepton and dilepton kinematic variables. Complementary measurements of (emu bbar{b} ) production, treating both (tbar{t}) and Wt events as signal, are also provided. Both sets of differential cross-sections are compared to the predictions of various Monte Carlo event generators, demonstrating that the state-of-the-art generators Powheg MiNNLO and Powheg bb4l describe the data better than Powheg hvq. \u0000\u0000\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 5","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-15311-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829304","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

Analysis of the hidden-charm pentaquark candidates in the (J/psi Lambda ) mass spectrum via the QCD sum rules 用QCD和规则分析(J/psi Lambda )质谱中隐粲五夸克候选者

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15680-6

Zhi-Gang Wang, Qi Xin

引用次数: 0

Charged Higgs signatures at future electron–proton colliders 未来电子-质子对撞机的带电希格斯特征

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15677-1

Baradhwaj Coleppa, Gokul B. Krishna

{"title":"Charged Higgs signatures at future electron–proton colliders","authors":"Baradhwaj Coleppa, Gokul B. Krishna","doi":"10.1140/epjc/s10052-026-15677-1","DOIUrl":"10.1140/epjc/s10052-026-15677-1","url":null,"abstract":"<div>In this work, we present a detailed collider phenomenology study of the charged Higgs boson within a Beyond the Standard Model (BSM) framework featuring an extended gauge and scalar sector. The charged Higgs can decay via conventional modes, such as ( H^- rightarrow bar{t}b ) and ( H^- rightarrow W^-h ), as well as through exotic channels like ( H^- rightarrow W'Z ) (or ( WZ' )). These decays lead to distinct final-state topologies determined by the nature of the intermediate particles. We perform a comprehensive phenomenological analysis at future electron–proton colliders, namely the LHeC and FCC-eh, considering the luminosity projections provided in their design reports. Our results indicate that the conventional decay modes of the charged Higgs boson can achieve observable sensitivity and even discovery prospects at sufficiently high luminosities. In contrast, the exotic decay channel ( H^- rightarrow W'Z ) does not exhibit any viable discovery potential. These findings highlight the complementarity of future electron-proton colliders in probing extended Higgs sectors, particularly through conventional charged Higgs signatures.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 5","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-15677-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829134","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

Effect of spin on the dynamics of multi-component transonic accretion flows around the spinning black holes 自旋对旋转黑洞周围多组分跨音速吸积流动力学的影响

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15564-9

Kalyanbrata Pal, Souvik Ghose, Shilpa Sarkar, Tapas K. Das

{"title":"Effect of spin on the dynamics of multi-component transonic accretion flows around the spinning black holes","authors":"Kalyanbrata Pal, Souvik Ghose, Shilpa Sarkar, Tapas K. Das","doi":"10.1140/epjc/s10052-026-15564-9","DOIUrl":"10.1140/epjc/s10052-026-15564-9","url":null,"abstract":"<div>We investigate axially symmetric accretion of low-angular-momentum hydrodynamic matter onto a rotating black hole. The gravitational field under consideration is assumed to be described by the pseudo-Newtonian Kerr potential proposed by Artemova et al. (ApJ 461:565, https://doi.org/10.1086/177084, 1996). A relativistic equation of state that incorporates information about different species is used in this work. Our aim is to construct and solve the hydrodynamical conservation equations governing such a flow and to obtain the corresponding stationary integral solutions. We find that, depending on the values of the initial boundary conditions, the accretion flow may exhibit multitransonic behaviour and a standing shock may form. It is observed that the spin of the black hole influences the transonic properties of the accretion flow. In addition, the composition of the infalling matter determines the thermodynamic characteristics of the flow. In this work, we investigate in detail the interplay between spin and composition in shaping the dynamics of accretion flows and the astrophysics of shock formation.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 5","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-15564-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829582","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

Gravitational waveforms from periodic orbits around a novel regular black hole 一个新的规则黑洞的周期轨道的引力波

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15667-3

Huajie Gong, Sheng Long, Xi-Jing Wang, Zhongwu Xia, Jian-Pin Wu, Qiyuan Pan

引用次数: 0

The effective field theory of the gravitational functional measure 引力泛函测度的有效场论

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15733-w

Henrique Knopki, Iberê Kuntz

{"title":"The effective field theory of the gravitational functional measure","authors":"Henrique Knopki, Iberê Kuntz","doi":"10.1140/epjc/s10052-026-15733-w","DOIUrl":"10.1140/epjc/s10052-026-15733-w","url":null,"abstract":"<div>The gravitational path integral measure has been the subject of an increasing interest lately, and no conclusive answer yet exists for its correct form. In this paper, we adopt effective field theory techniques to shed light on this issue. We build the configuration-space metric as an energy expansion, including all possible terms that satisfy the underlying symmetries, and use it to define a Riemannian measure. We study the running of the free parameters that show up in this expansion at leading order, which corresponds to the DeWitt metric with parameter (lambda .) We show that a flat configuration space is excluded on unitarity grounds. Within the vacuum-sector normalization convention adopted here, the renormalization group flow in the DeWitt truncation exhibits a UV-attractive fixed point at (lambda =-1.) This fixed point matches the value obtained by identifying DeWitt’s metric from the kinetic term of general relativity, but in our approach it arises without assuming that identification a priori, providing a renormalization group rationale for the standard choice.\u0000\u0000\u0000\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 5","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-15733-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829550","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

Electrical conductivity of QGP with quasiparticle quarks and Gribov gluon 具有准粒子夸克和格里波夫胶子的QGP的电导率

IF 4.8 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-05-05 DOI: 10.1140/epjc/s10052-026-15706-z

Sadaf Madni, Sumit, Lata Thakur, Najmul Haque

引用次数: 0