Physics Letters B最新文献

{"title":"First measurement of b-jet mass with and without grooming","authors":"LHCb collaboration","doi":"10.1016/j.physletb.2025.139854","DOIUrl":"10.1016/j.physletb.2025.139854","url":null,"abstract":"<div><div>The LHCb collaboration presents a novel suite of heavy-flavour jet substructure measurements at forward rapidity in proton-proton collisions at a centre-of-mass energy of <span><math><mrow><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn></mrow></math></span>TeV. The jet mass is a perturbatively calculable probe of the virtuality of hard-scattered quarks and gluons, connecting small-distance quantum chromodynamics (QCD) with long-distance experimental measurement. The jet mass is dominated by nonperturbative corrections at small values, presenting an excellent test of QCD across a broad range of jet energies. Measuring heavy-flavour jet mass with a theoretically unambiguous flavour definition for the first time probes the gluon splitting mechanism for heavy-flavour production and offers tests of perturbative QCD at new levels of theoretical precision. Utilising the soft drop jet-grooming technique to access the perturbative jet core further enhances constraints on first-principles theory. Measurements of the jet mass for jets containing fully reconstructed <span><math><msup><mi>B</mi><mo>±</mo></msup></math></span> hadrons are reported with and without grooming. The unique phase space instrumented by LHCb offers a different quark-gluon fraction than at midrapidity. These results offer unparalleled tests of quark flavour and mass dependence in QCD and provide a baseline for future studies of heavy-flavour jet quenching in heavy-ion collisions.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139854"},"PeriodicalIF":4.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Diffusion Monte Carlo calculation of compact Tcs0 and Tcs¯0 tetraquarks","authors":"M.C. Gordillo ,&nbsp;J. Segovia","doi":"10.1016/j.physletb.2025.139927","DOIUrl":"10.1016/j.physletb.2025.139927","url":null,"abstract":"<div><div>The LHCb collaboration amplitude analysis of the decays <span><math><mrow><msup><mi>B</mi><mo>+</mo></msup><mo>→</mo><msup><mi>D</mi><mo>+</mo></msup><msup><mi>D</mi><mo>−</mo></msup><msup><mi>K</mi><mo>+</mo></msup></mrow></math></span>, <span><math><mrow><msup><mi>B</mi><mo>+</mo></msup><mo>→</mo><msup><mi>D</mi><mo>−</mo></msup><msubsup><mi>D</mi><mi>s</mi><mo>+</mo></msubsup><msup><mi>π</mi><mo>+</mo></msup></mrow></math></span>, and <span><math><mrow><msup><mi>B</mi><mn>0</mn></msup><mo>→</mo><msup><mover><mi>D</mi><mo>¯</mo></mover><mn>0</mn></msup><msubsup><mi>D</mi><mi>s</mi><mo>+</mo></msubsup><msup><mi>π</mi><mo>−</mo></msup></mrow></math></span> suggested the existence of two new resonant <span><math><mrow><msup><mi>J</mi><mi>P</mi></msup><mo>=</mo><msup><mn>0</mn><mo>+</mo></msup></mrow></math></span> states with minimum quark content <span><math><mrow><mover><mi>u</mi><mo>¯</mo></mover><mover><mi>d</mi><mo>¯</mo></mover><mi>s</mi><mi>c</mi></mrow></math></span> and <span><math><mrow><mover><mi>s</mi><mo>¯</mo></mover><mover><mi>u</mi><mo>¯</mo></mover><mi>d</mi><mi>c</mi></mrow></math></span>/<span><math><mrow><mover><mi>s</mi><mo>¯</mo></mover><mover><mi>d</mi><mo>¯</mo></mover><mi>u</mi><mi>c</mi></mrow></math></span>, named <span><math><msub><mi>T</mi><mrow><mi>c</mi><mi>s</mi><mn>0</mn></mrow></msub></math></span> and <span><math><msub><mi>T</mi><mrow><mi>c</mi><mover><mi>s</mi><mo>¯</mo></mover><mn>0</mn></mrow></msub></math></span>, respectively. In this work, we used the diffusion Monte Carlo (DMC) method to compute the masses of those tetraquarks within the framework of the constituent quark model. We describe the systems as compact structures, not as diquark/antidiquark or meson/meson arrangements. In this context, compact means that we used directly the eigenvectors of the spin, color and flavor operators without any splitting and/or (re)combination of smaller units. This allows us to deduce the existence of two distinct bound configurations for each composition, corresponding to ground and excited flavor states. In both cases, the excited flavor states are the ones with masses comparable to the ones observed by LHCb. In addition, our analysis allows us to assign unambiguously an isospin value of <span><math><mi>I</mi></math></span>=1 to the experimentally obtained <span><math><msub><mi>T</mi><mrow><mi>c</mi><mi>s</mi><mn>0</mn></mrow></msub></math></span> tetraquark.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139927"},"PeriodicalIF":4.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Tensor-polarized parton density in the N→Δ transition","authors":"June-Young Kim,&nbsp;Christian Weiss","doi":"10.1016/j.physletb.2025.139924","DOIUrl":"10.1016/j.physletb.2025.139924","url":null,"abstract":"<div><div>The generalized parton distributions for transitions between baryon states with different masses have a forward limit in which they behave as parton densities (light-front momentum transfer <span><math><mrow><msup><mstyle><mi>Δ</mi></mstyle><mo>+</mo></msup><mo>,</mo><msub><mstyle><mi>Δ</mi></mstyle><mi>T</mi></msub><mo>=</mo><mn>0</mn></mrow></math></span>, energy transfer <span><math><mrow><msup><mstyle><mi>Δ</mi></mstyle><mo>−</mo></msup><mo>≠</mo><mn>0</mn></mrow></math></span>). These “transition parton densities” can realize spin/isospin quantum numbers not accessible in the ground-state nucleon. The <span><math><mrow><mi>N</mi><mo>→</mo><mstyle><mi>Δ</mi></mstyle></mrow></math></span> transition gives rise to a new parton density proportional to the <span><math><mrow><mn>1</mn><mo>/</mo><mn>2</mn><mo>→</mo><mn>3</mn><mo>/</mo><mn>2</mn></mrow></math></span> spin transition tensor. Its properties are derived, and its magnitude is estimated in the chiral quark-soliton model based on the large-<span><math><msub><mi>N</mi><mi>c</mi></msub></math></span> limit of QCD.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139924"},"PeriodicalIF":4.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Boundary conditions of warped AdS3 in new massive gravity","authors":"S.N. Sajadi,&nbsp;Supakchai Ponglertsakul","doi":"10.1016/j.physletb.2025.139918","DOIUrl":"10.1016/j.physletb.2025.139918","url":null,"abstract":"<div><div>To satisfy the Cardy formula for Warped AdS<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span> (WAdS<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span>) solutions in a quadratic ensemble, a specific set of boundary conditions has been proposed in [1]. In this paper, these boundary conditions have been investigated in the three-dimensional new massive gravity (NMG) framework. The associated solution space, asymptotic symmetries, and charge algebra have been extracted. It has been shown that the surface charges are finite, but not integrable, and the integrability of the charges is obtained after restricting to a sub-sector of the original solution space. Finally, we have proved that the Cardy formula reproduces the thermodynamic entropy of a warped BTZ black hole.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139918"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"The Large Magellanic Cloud as a source of the highest energy cosmic rays","authors":"Roger Clay ,&nbsp;Tadeusz Wibig","doi":"10.1016/j.physletb.2025.139903","DOIUrl":"10.1016/j.physletb.2025.139903","url":null,"abstract":"<div><div>The Pierre Auger Observatory has published properties of the 100 highest-energy cosmic ray events (to energies above 100 EeV) which it recorded over a 17 year period. We have examined the directional properties of these events and have taken particular note of the most energetically extreme events. We find that the most energetic events have directions which are grouped in a non-random way at the 1 % level. There is an apparent clustering in a limited region of the sky. Close to that direction is found Centaurus A, which has long been considered as a source of such particles, but we also note that a close-by dwarf galaxy, the Large Magellanic Cloud (LMC) is closer in angular terms. We examine the possibility that the LMC might be a source of observed cosmic rays at the highest energies.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139903"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Could regular primordial black holes be dark matter?","authors":"Mohsen Khodadi","doi":"10.1016/j.physletb.2025.139922","DOIUrl":"10.1016/j.physletb.2025.139922","url":null,"abstract":"<div><div>The recent proposal proposed by Paul Davies and colleagues [Phys. Rev. D <strong>111</strong> (2025) no.10, 103512] that regular primordial black holes (RPBHs) form stable, zero-temperature remnants and could thereby constitute dark matter is critically examined. While the introduction of a fundamental length scale indeed regulates the Hawking temperature, preventing its divergence, we show that the evaporation timescale for such RPBHs is infinite. This result holds generically for analytic regular black hole spacetimes under standard adiabatic and quasi-static evolution. Consequently, RPBHs never actually reach a true remnant state within any finite time, but instead persist as slowly evaporating objects with a non-zero luminosity. When the combined emission from a cosmological population of these near-remnants is considered, the resulting radiation is found to violate stringent observational constraints from the cosmic microwave background and extragalactic gamma-ray backgrounds. Therefore, low-mass RPBHs are not viable dark matter candidates.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139922"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"LIV-decoherence on gravitational cat states","authors":"Iarley P. Lobo ,&nbsp;Kelvin Sampaio ,&nbsp;Gislaine Varão ,&nbsp;Moises Rojas ,&nbsp;Valdir B. Bezerra","doi":"10.1016/j.physletb.2025.139923","DOIUrl":"10.1016/j.physletb.2025.139923","url":null,"abstract":"<div><div>Inspired by approaches based on the stochastic generalized uncertainty principle, we propose a Lindblad equation derived from the quantization of a stochastic modified dispersion relation in a Lorentz Invariance Violation (LIV) scenario. This framework enables us to investigate decoherence effects in a system of particles exhibiting gravitationally induced entanglement. We analyze the impact of LIV on entanglement (quantified by concurrence) considering systematic and stochastic effects.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139923"},"PeriodicalIF":4.5,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Erratum: Disappearance of partonic collectivity in √ sNN = 3 GeV Au+Au collisions at RHIC [Phys. Lett. B 827, 137003 (2022)]","authors":"STAR Collaboration ,&nbsp;D. Isenhower ,&nbsp;J.L. Drachenberg ,&nbsp;M. Daugherity ,&nbsp;L. Adamczyk ,&nbsp;L. Fulek ,&nbsp;M. Przybycien ,&nbsp;R. Sikora ,&nbsp;I. Alekseev ,&nbsp;D.N. Svirida ,&nbsp;I.G. Bordyuzhin ,&nbsp;D.G. Underwood ,&nbsp;H.M. Spinka ,&nbsp;M. Zurek ,&nbsp;A. Hamed ,&nbsp;F.M. Fawzi ,&nbsp;M.S. Abdallah ,&nbsp;J. Jia ,&nbsp;A. Jentsch ,&nbsp;A. Kiselev ,&nbsp;T. Liu","doi":"10.1016/j.physletb.2025.139912","DOIUrl":"10.1016/j.physletb.2025.139912","url":null,"abstract":"<div><div>We report on the measurements of directed flow <span><math><msub><mi>v</mi><mn>1</mn></msub></math></span> and elliptic flow <span><math><msub><mi>v</mi><mn>2</mn></msub></math></span> for hadrons (<span><math><msup><mi>π</mi><mo>±</mo></msup></math></span>, <span><math><msup><mi>K</mi><mo>±</mo></msup></math></span>, <span><math><msubsup><mi>K</mi><mrow><mi>S</mi></mrow><mn>0</mn></msubsup></math></span>, <span><math><mi>p</mi></math></span>, <span><math><mi>ϕ</mi></math></span>, <span><math><mstyle><mi>Λ</mi></mstyle></math></span> and <span><math><msup><mstyle><mi>Ξ</mi></mstyle><mo>−</mo></msup></math></span>) from Au+Au collisions at <span><math><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt></math></span> = 3 GeV and <span><math><msub><mi>v</mi><mn>2</mn></msub></math></span> for (<span><math><msup><mi>π</mi><mo>±</mo></msup></math></span>, <span><math><msup><mi>K</mi><mo>±</mo></msup></math></span>, <span><math><mi>p</mi></math></span> and <span><math><mover><mrow><mi>p</mi></mrow><mo>‾</mo></mover></math></span>) at 27 and 54.4 GeV with the STAR experiment. While at the two higher energy midcentral collisions the number-of-constituent-quark (NCQ) scaling holds, at 3 GeV the <span><math><msub><mi>v</mi><mn>2</mn></msub></math></span> at midrapidity is negative for all hadrons and the NCQ scaling is absent. In addition, the <span><math><msub><mi>v</mi><mn>1</mn></msub></math></span> slopes at midrapidity for almost all observed hadrons are found to be positive, implying dominant repulsive baryonic interactions. The features of negative <span><math><msub><mi>v</mi><mn>2</mn></msub></math></span> and positive <span><math><msub><mi>v</mi><mn>1</mn></msub></math></span> slope at 3 GeV can be reproduced with a baryonic mean-field in transport model calculations. These results imply that the medium in such collisions is likely characterized by baryonic interactions.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139912"},"PeriodicalIF":4.5,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Detection of the stochastic gravitational wave background with the space-based gravitational-wave detector network","authors":"Jun Cheng ,&nbsp;En-Kun Li ,&nbsp;Jianwei Mei","doi":"10.1016/j.physletb.2025.139890","DOIUrl":"10.1016/j.physletb.2025.139890","url":null,"abstract":"<div><div>The stochastic gravitational wave background (SGWB) is one of the main detection targets for future millihertz space-based gravitational-wave observatories such as the laser interferometer space antenna (LISA), TianQin, and Taiji. For a single LISA-like detector, a null-channel method was developed to identify the SGWB by integrating data from the A and E channels with a noise-only T channel. However, the noise monitoring channel will not be available if one of the laser interferometer arms fails. By combining these detectors, it will be possible to build detector networks to search for SGWB via cross-correlation analysis. In this work, we developed a Bayesian data analysis method based on time delay interferometry (TDI) Michelson-type channel. We then investigate the detectability of the TianQin-LISA detector network for various isotropic SGWB. Assuming a three-month observation, the TianQin-LISA detector network could be able to confidently detect SGWB with energy density as low as <span><math><mrow><msub><mstyle><mi>Ω</mi></mstyle><mrow><mrow><mi>P</mi></mrow><mi>L</mi></mrow></msub><mo>=</mo><mn>6.0</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>13</mn></mrow></msup></mrow></math></span>, <span><math><mrow><msub><mstyle><mi>Ω</mi></mstyle><mrow><mrow><mi>F</mi></mrow><mi>l</mi><mi>a</mi><mi>t</mi></mrow></msub><mo>=</mo><mn>2.0</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>12</mn></mrow></msup></mrow></math></span> and <span><math><mrow><msub><mstyle><mi>Ω</mi></mstyle><mrow><mrow><mi>S</mi></mrow><mi>P</mi></mrow></msub><mo>=</mo><mn>1.2</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>12</mn></mrow></msup></mrow></math></span> for power-law, flat and single-peak models, respectively.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139890"},"PeriodicalIF":4.5,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"ACT-ing on inflation: Implications of non bunch-Davies initial condition and reheating on single-field slow roll models","authors":"Suvashis Maity","doi":"10.1016/j.physletb.2025.139913","DOIUrl":"10.1016/j.physletb.2025.139913","url":null,"abstract":"<div><div>We investigate a class of slow roll inflationary models in light of the recent Cosmic Microwave Background constraints from Planck 2018, ACT DR6, DESI DR1, and BICEP/<em>Keck</em> 2018. The combined dataset favors a higher value of the scalar spectral index <span><math><mrow><msub><mi>n</mi><msub><mrow></mrow><mrow><mi>S</mi></mrow></msub></msub><mo>=</mo><mn>0.9743</mn><mo>±</mo><mn>0.0034</mn></mrow></math></span>, which places increased pressure on several conventional inflationary scenarios. In this study, we analyze the observational viability of various well-motivated models, including the <span><math><mi>α</mi></math></span>-attractor E- and T-models, chaotic inflation, hilltop inflation, and natural inflation. We incorporate the effects of a post-inflationary phase of reheating and examine how the dynamics of reheating influence the predictions in the <span><math><mrow><msub><mi>n</mi><msub><mrow></mrow><mrow><mi>S</mi></mrow></msub></msub><mo>−</mo><mi>r</mi></mrow></math></span> plane. We also impose a lower bound on the reheating temperature based on the constraint from the effective number of relativistic species (<span><math><mrow><mstyle><mi>Δ</mi></mstyle><msub><mi>N</mi><mrow><mi>eff</mi></mrow></msub></mrow></math></span>) arising from primordial gravitational waves. While reheating improves agreement with observations for some models, significant regions of parameter space remain disfavored. Finally, we explore the impact of a non Bunch-Davies initial state and demonstrate that it can substantially improve the fit to the <span><math><mrow><msub><mi>n</mi><msub><mrow></mrow><mrow><mi>S</mi></mrow></msub></msub><mo>−</mo><mi>r</mi></mrow></math></span> data across a broader class of inflationary models, thereby offering a potentially viable mechanism for reconciling theory with the latest observations.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139913"},"PeriodicalIF":4.5,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}