Journal of High Energy Physics最新文献_第10页

Non-factorisable effects in the decays ( {overline{B}}_s^0to {D}_s^{+}{pi}^{-} ) and ( {overline{B}}^0to {D}^{+}{K}^{-} ) from LCSR 来自 LCSR 的 ( {overline{B}}_s^0to {D}_s^{+}{pi}^{-}) 和 ( {overline{B}}^0to {D}^{+}{K}^{-}) 衰变中的不可因子效应

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)180

Maria Laura Piscopo, Aleksey V. Rusov

{"title":"Non-factorisable effects in the decays ( {overline{B}}_s^0to {D}_s^{+}{pi}^{-} ) and ( {overline{B}}^0to {D}^{+}{K}^{-} ) from LCSR","authors":"Maria Laura Piscopo, Aleksey V. Rusov","doi":"10.1007/JHEP10(2023)180","DOIUrl":"10.1007/JHEP10(2023)180","url":null,"abstract":"In light of the current discrepancies between the recent predictions based on QCD factorisation (QCDF) and the experimental data for several non-leptonic colour-allowed two-body B-meson decays, we obtain new determinations of the non-factorisable soft-gluon contribution to the decays ( {overline{B}}_s^0to {D}_s^{+}{pi}^{-} ) and ( {overline{B}}^0to {D}^{+}{K}^{-} ), using the framework of light-cone sum rule (LCSR), with a suitable three-point correlation function and B-meson light-cone distribution amplitudes. In particular, we discuss the problem associated with a double light-cone (LC) expansion of the correlator, and motivate future determinations of the three-particle B-meson matrix element with the gluon and the spectator quark aligned along different light-cone directions. Performing a LC-local operator product expansion of the correlation function, we find, for both modes considered, the non-factorisable part of the amplitude to be sizeable and positive, however, with very large systematic uncertainties. Furthermore, we also determine for the first time, using LCSR, the factorisable amplitudes at LO-QCD, and thus the corresponding branching fractions. Our predictions are in agreement with the experimental data and consistent with the results based on QCDF, although again within very large uncertainties. In this respect, we provide a rich outlook for future improvements and investigations.","PeriodicalId":48906,"journal":{"name":"Journal of High Energy Physics","volume":"2023 10","pages":""},"PeriodicalIF":5.4,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2023)180.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136106380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Eternal traversable wormholes in three dimensions 三维空间中可永恒穿越的虫洞

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)178

William Harvey, Kristan Jensen

引用次数: 0

Fusion of conformal defects in interacting theories 相互作用理论中保元缺陷的融合

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)183

Alexander Söderberg Rousu

引用次数: 0

The absence of observable proton decay in a global SU(5) F-theory model 全局 SU(5) F 理论模型中不存在可观测的质子衰变

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)181

Herbert Clemens, Stuart Raby

引用次数: 0

On the initial singularity and extendibility of flat quasi-de Sitter spacetimes 关于平坦准德西特空间的初始奇异性和可扩展性

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)182

Ghazal Geshnizjani, Eric Ling, Jerome Quintin

{"title":"On the initial singularity and extendibility of flat quasi-de Sitter spacetimes","authors":"Ghazal Geshnizjani, Eric Ling, Jerome Quintin","doi":"10.1007/JHEP10(2023)182","DOIUrl":"10.1007/JHEP10(2023)182","url":null,"abstract":"Inflationary spacetimes have been argued to be past geodesically incomplete in many situations. However, whether the geodesic incompleteness implies the existence of an initial spacetime curvature singularity or whether the spacetime may be extended (potentially into another phase of the universe) is generally unknown. Both questions have important physical implications. In this paper, we take a closer look at the geometrical structure of inflationary spacetimes and investigate these very questions. We first classify which past inflationary histories have a scalar curvature singularity and which might be extendible and/or non-singular in homogeneous and isotropic cosmology with flat spatial sections. Then, we derive rigorous extendibility criteria of various regularity classes for quasi-de Sitter spacetimes that evolve from infinite proper time in the past. Finally, we show that beyond homogeneity and isotropy, special continuous extensions respecting the Einstein field equations with a perfect fluid must have the equation of state of a de Sitter universe asymptotically. An interpretation of our results is that past-eternal inflationary scenarios are most likely physically singular, except in situations with very special initial conditions.","PeriodicalId":48906,"journal":{"name":"Journal of High Energy Physics","volume":"2023 10","pages":""},"PeriodicalIF":5.4,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2023)182.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136068341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Probing proton structure with ( textrm{c}overline{textrm{c}} ) correlations in ultraperipheral pA collisions 用超外围 pA 碰撞中的（textrm{c}overline{textrm{c}}）相关性探测质子结构

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)179

Barbara Linek, Agnieszka Łuszczak, Marta Łuszczak, Roman Pasechnik, Wolfgang Schäfer, Antoni Szczurek

{"title":"Probing proton structure with ( textrm{c}overline{textrm{c}} ) correlations in ultraperipheral pA collisions","authors":"Barbara Linek, Agnieszka Łuszczak, Marta Łuszczak, Roman Pasechnik, Wolfgang Schäfer, Antoni Szczurek","doi":"10.1007/JHEP10(2023)179","DOIUrl":"10.1007/JHEP10(2023)179","url":null,"abstract":"We study the exclusive diffractive ( coverline{c} ) photoproduction in ultraperipheral pA collisions. The formalism makes use of off-diagonal generalizations of the unintegrated gluon distribution, the so-called generalized transverse momentum dependent distributions (GTMDs). We present two different formulations. The first one is based directly on gluon GTMD parametrizations in momentum space. Another option is the calculation of the GTMD as a Fourier transform of the dipole-nucleon scattering amplitude N(Y, ( overrightarrow{r} )⊥, ( overrightarrow{b} )⊥). The latter approach requires some extra regularization discussed in the paper. Different dipole amplitudes from the literature are used. Compared to previous calculations in the literature, we integrate over the full phase space and therefore cross sections for realistic conditions are obtained. We present distributions in rapidity of c or ( overline{c} ), transverse momentum of the ( coverline{c} ) pair, four-momentum transfer squared as well as the azimuthal correlation between a sum and a difference of the c and ( overline{c} ) transverse momenta. The azimuthal correlations are partially due to the so-called elliptic gluon Wigner distribution. Different models lead to different modulations in the azimuthal angle. The modulations are generally smaller than 5%. They depend on the range of transverse momentum selected for the calculation.","PeriodicalId":48906,"journal":{"name":"Journal of High Energy Physics","volume":"2023 10","pages":""},"PeriodicalIF":5.4,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2023)179.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136069205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

5d to 3d compactifications and discrete anomalies 5d 到 3d 压缩和离散异常

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)185

Matteo Sacchi, Orr Sela, Gabi Zafrir

{"title":"5d to 3d compactifications and discrete anomalies","authors":"Matteo Sacchi, Orr Sela, Gabi Zafrir","doi":"10.1007/JHEP10(2023)185","DOIUrl":"10.1007/JHEP10(2023)185","url":null,"abstract":"Much insight into the dynamics of quantum field theories can be gained by studying the relationship between field theories in different dimensions. An interesting observation is that when two theories are related by dimensional reduction on a compact surface, their ’t Hooft anomalies corresponding to continuous symmetries are also related: the anomaly polynomial of the lower-dimensional theory can be obtained by integrating that of the higher-dimensional one on the compact surface. Naturally, this relation only holds if both theories are even dimensional. This raises the question of whether similar relations can also hold for the case of anomalies in discrete symmetries, which might be true even in odd dimensions. The natural generalization to discrete symmetries is that the anomaly theories, associated with the lower and higher dimensional theories, would be related by reduction on the compact surface. We explore this idea for compactifications of 5d superconformal field theories (SCFTs) to 3d on Riemann surfaces with global-symmetry fluxes. In this context, it can be used both as a check for these compactification constructions and for discovering new anomalies in the 5d SCFTs. This opens the way to applying the same idea of dimensional reduction of the anomaly theory to more general types of compactifications.","PeriodicalId":48906,"journal":{"name":"Journal of High Energy Physics","volume":"2023 10","pages":""},"PeriodicalIF":5.4,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2023)185.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Renormalons in the energy-energy correlator 能能相关器中的正负电子

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)187

Stella T. Schindler, Iain W. Stewart, Zhiquan Sun

引用次数: 0

Marginal deformations of Calabi-Yau hypersurface hybrids with (2,2) supersymmetry 具有 (2,2) 超对称性的 Calabi-Yau 超曲面混合体的边际变形

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2023-10-30 DOI: 10.1007/JHEP10(2023)186

Griffen Adams, Ilarion V. Melnikov

引用次数: 0

Scattering three closed strings off a Dp-brane in pure spinor formalism 在纯自旋形式主义中散射 Dp 膜上的三条闭合弦