发布求助
文献互助 智能选刊 最新文献

The European Physical Journal C最新文献

筛选
英文 中文
Non-unitary limits on different textures for low-scale seesaw models
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-10 DOI: 10.1140/epjc/s10052-025-14126-9
Jesús Miguel Celestino-Ramírez, G. Hernández-Tomé, O. G. Miranda, Eduardo Peinado
{"title":"Non-unitary limits on different textures for low-scale seesaw models","authors":"Jesús Miguel Celestino-Ramírez,&nbsp;G. Hernández-Tomé,&nbsp;O. G. Miranda,&nbsp;Eduardo Peinado","doi":"10.1140/epjc/s10052-025-14126-9","DOIUrl":"10.1140/epjc/s10052-025-14126-9","url":null,"abstract":"<div><p>New heavy neutral leptons lead to non-unitary effects in models for neutrino masses. Such effects could represent a sign of new physics beyond the Standard Model, leading to observable deviations in neutrino oscillation experiments, lepton flavor violation, and other precision measurements. This work explores the parameter space of the linear and inverse low-scale seesaw models based on flavor symmetries consistent with neutrino oscillation experiments. In particular, we investigated the violation of unitarity when the lepton flavor violation is absent and when only one lepton flavor-violating channel is present.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14126-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818189","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
Spin one matter fields
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-10 DOI: 10.1140/epjc/s10052-025-14045-9
Daniel O. R. Azevedo, Oswaldo M. Del Cima, Thadeu D. S. Dias, Daniel H. T. Franco, Emílio D. Pereira, Olivier Piguet
{"title":"Spin one matter fields","authors":"Daniel O. R. Azevedo,&nbsp;Oswaldo M. Del Cima,&nbsp;Thadeu D. S. Dias,&nbsp;Daniel H. T. Franco,&nbsp;Emílio D. Pereira,&nbsp;Olivier Piguet","doi":"10.1140/epjc/s10052-025-14045-9","DOIUrl":"10.1140/epjc/s10052-025-14045-9","url":null,"abstract":"<div><p>It is shown how spin one vector matter fields can be coupled to a Yang–Mills theory. Such matter fields are defined as belonging to a representation <i>R</i> of this Yang–Mills gauge algebra <span>(mathfrak {g})</span>. It is also required that these fields together with the original gauge fields be the gauge fields of an embedding total gauge algebra <span>(mathfrak {g}_{textrm{tot}})</span>. The existence of a physically consistent Yang–Mills action for the total algebra is finally required. These conditions are rather restrictive, as shown in some examples: non-trivial solutions may or may not exist depending on the choice of the original algebra <span>(mathfrak {g})</span> and of the representation <i>R</i>. Some examples are shown, the case of the initial algebra <span>(mathfrak {g})</span> = <span>(mathfrak {u}(1)oplus mathfrak {su}(2))</span> being treated in more detail.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14045-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818217","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
Status of QCD precision predictions for Drell–Yan rapidity distributions
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-10 DOI: 10.1140/epjc/s10052-025-14027-x
S. Alekhin, S. Amoroso, L. Buonocore, A. Huss, S. Kallweit, A. Kardos, J. Michel, S. Moch, F. Petriello, L. Rottoli, Z. Trócsányi, M. Wiesemann
{"title":"Status of QCD precision predictions for Drell–Yan rapidity distributions","authors":"S. Alekhin,&nbsp;S. Amoroso,&nbsp;L. Buonocore,&nbsp;A. Huss,&nbsp;S. Kallweit,&nbsp;A. Kardos,&nbsp;J. Michel,&nbsp;S. Moch,&nbsp;F. Petriello,&nbsp;L. Rottoli,&nbsp;Z. Trócsányi,&nbsp;M. Wiesemann","doi":"10.1140/epjc/s10052-025-14027-x","DOIUrl":"10.1140/epjc/s10052-025-14027-x","url":null,"abstract":"<div><p>We compute differential distributions for Drell–Yan processes at the LHC and the Tevatron colliders at next-to-next-to-leading order in perturbative QCD, including fiducial cuts on the decay leptons in the final state. The comparison of predictions obtained with four different codes shows excellent agreement, once linear power corrections from the fiducial cuts are included in those codes that rely on phase-space slicing subtraction schemes. For <i>Z</i>-boson production we perform a detailed study of the symmetric cuts on the transverse momenta of the decay leptons. Predictions at fixed order in perturbative QCD for those symmetric cuts, typically imposed in experiments, suffer from an instability. We show how this can be remedied by an all-order resummation of the fiducial transverse momentum spectrum, and we comment on the choice of cuts for future experimental analyses.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14027-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818188","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
Addendum: Observational redshift from general spherically symmetric black holes
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-10 DOI: 10.1140/epjc/s10052-025-14114-z
Diego A. Martínez-Valera, Mehrab Momennia, Alfredo Herrera-Aguilar
{"title":"Addendum: Observational redshift from general spherically symmetric black holes","authors":"Diego A. Martínez-Valera,&nbsp;Mehrab Momennia,&nbsp;Alfredo Herrera-Aguilar","doi":"10.1140/epjc/s10052-025-14114-z","DOIUrl":"10.1140/epjc/s10052-025-14114-z","url":null,"abstract":"<div><p>In this addendum, we change the sign of the squared length scale parameter (<span>(l^2rightarrow -l^2)</span>) in the conformal factor presented in Eq. (36) of the original article to explore its effects on the observational frequency shift. We make this change of sign because it removes an unnecessary physical singularity at <span>(r=l)</span> from the original expression of the curvature invariants of the conformal metric. Then, we apply this correction to all the equations involving the parameter <span>(l^2)</span> and find that under this modification in the conformal mapping, the relations of redshift/blueshift and gravitational redshift change. The new equations are represented in Eqs. (44)–(45) and their behavior are illustrated in Figs. 1, 2 and 3, corresponding to the equations and figures in the original article. Additionally, due to this change of the sign in the squared length scale parameter, we discuss the effects of this parameter on the observational frequency shift which differ from those presented in section 5 of the original article. We also note that the expressions as well as corresponding figures and discussions presented in the original paper are correct for that choice of the conformal factor.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14114-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809274","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
(Z_5) two-component dark matter in the type-II seesaw mechanism
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-10 DOI: 10.1140/epjc/s10052-025-14057-5
XinXin Qi, Hao Sun
{"title":"(Z_5) two-component dark matter in the type-II seesaw mechanism","authors":"XinXin Qi,&nbsp;Hao Sun","doi":"10.1140/epjc/s10052-025-14057-5","DOIUrl":"10.1140/epjc/s10052-025-14057-5","url":null,"abstract":"<div><p>We consider the <span>(Z_5)</span> two-component dark matter model within the framework of the Type-II seesaw mechanism. Due to the new annihilation processes related to triplets, the light component cannot necessarily be dominant in the dark matter relic density, which is different from the two singlet extension of the standard model with a <span>(Z_5)</span> symmetry. The model is considered to explain the excess of electron-positron flux measured by the AMS-02 Collaborations in this work, which is encouraged by the decay of the triplets arising from dark matter annihilations in the Galactic halo. We discuss the cases of the light and heavy components determining dark matter density within a viable parameter space satisfying relic density and direct detection constraints, and by fitting the antiproton spectrum observed in the PAMELA and AMS experiments, we find that the parameter space is flexible and the electron-positron flux excess can be obtained in both cases with the mass of two dark matter particles being larger than that of the triplets’.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14057-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818187","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 novel configuration of gluonic tetraquark state
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-09 DOI: 10.1140/epjc/s10052-025-14106-z
Chun-Meng Tang, Chun-Gui Duan, Liang Tang, Cong-Feng Qiao
{"title":"A novel configuration of gluonic tetraquark state","authors":"Chun-Meng Tang,&nbsp;Chun-Gui Duan,&nbsp;Liang Tang,&nbsp;Cong-Feng Qiao","doi":"10.1140/epjc/s10052-025-14106-z","DOIUrl":"10.1140/epjc/s10052-025-14106-z","url":null,"abstract":"<div><p>Inspired by the experimental measurement of the charmed hadronic state X(6900), we calculate the mass spectra of tetraquark hybrid states with configuration of <span>([8_{c}]_{Qbar{Q}} otimes [8_{c}]_{G} otimes [8_{c}]_{Qbar{Q}})</span> in color, by virtue of QCD sum rules. The two feasible types of currents with quantum numbers <span>(J^{PC} = 0^{++})</span> and <span>(0^{-+})</span> are investigated, in which the contributions from operators up to dimension six are taken into account in operator product expansion (OPE). In the end, we find that, in charm sector, the tetracharm hybrid states with quantum number <span>(0^{++})</span> has a mass of about <span>(6.98^{+0.16}_{-0.14} , text {GeV})</span>, while <span>(0^{-+})</span> state mass is about <span>(7.26^{+0.16}_{-0.15} , text {GeV})</span>. The results overlap with the experimental observations, suggesting potential tetracharm hybrid interpretations. In bottom sector, calculation shows that the masses of tetrabottom hybrid states with quantum numbers <span>(0^{++})</span> and <span>(0^{-+})</span> are <span>(19.30^{+0.16}_{-0.17} , text {GeV})</span> and <span>(19.50^{+0.17}_{-0.17} , text {GeV})</span>, respectively, which are left for future experimental confirmation.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14106-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801198","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
Displaced heavy neutral lepton from new Higgs doublet
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-09 DOI: 10.1140/epjc/s10052-025-14125-w
Fa-Xin Yang, Feng-Lan Shao, Zhi-Long Han, Yi Jin, Honglei Li
{"title":"Displaced heavy neutral lepton from new Higgs doublet","authors":"Fa-Xin Yang,&nbsp;Feng-Lan Shao,&nbsp;Zhi-Long Han,&nbsp;Yi Jin,&nbsp;Honglei Li","doi":"10.1140/epjc/s10052-025-14125-w","DOIUrl":"10.1140/epjc/s10052-025-14125-w","url":null,"abstract":"<div><p>Heavy neutral leptons <i>N</i> are introduced to explain the tiny neutrino masses via the seesaw mechanism. For proper small mixing parameter <span>(V_{ell N},)</span> the heavy neutral leptons <i>N</i> become long-lived, which leads to the displaced vertex signature at colliders. In this paper, we consider the displaced heavy neutral lepton from the neutrinophilic Higgs doublet <span>(Phi _nu )</span> decay. The new Higgs doublet with MeV scale VEV can naturally explain the tiny neutrino masses with TeV scale <i>N</i>. Different from current experimental searches via the <span>(W^pm rightarrow ell ^pm N)</span> decay, the branching ratios of new decays as <span>(H^pm rightarrow ell ^pm N)</span> are not suppressed when <span>(|V_{ell N}|gtrsim 10^{-16}.)</span> Therefore, a larger parameter space is expected to be detected at colliders. We then investigate the promising region at the 14 TeV HL-LHC and the 3 TeV CLIC. According to our simulation, the DV signature could probe <span>(|V_{ell N}|^2gtrsim 10^{-18})</span> with <span>(m_N&lt;m_{H^+},)</span> which covers the seesaw predicted value <span>(|V_{ell N}|^2sim m_nu /m_N.)</span> We could probe <span>(m_{H^+}lesssim 1100)</span> GeV at the 14 TeV HL-LHC and <span>(m_{H^+}lesssim 1490)</span> GeV at the 3 TeV CLIC.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14125-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809112","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
Erratum to: Two-loop renormalization group restrictions on the standard model and the fourth chiral family
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-09 DOI: 10.1140/epjc/s10052-025-14108-x
Yu. F. Pirogov, O. V. Zenin
{"title":"Erratum to: Two-loop renormalization group restrictions on the standard model and the fourth chiral family","authors":"Yu. F. Pirogov,&nbsp;O. V. Zenin","doi":"10.1140/epjc/s10052-025-14108-x","DOIUrl":"10.1140/epjc/s10052-025-14108-x","url":null,"abstract":"","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14108-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809311","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
The nonfactorizable QED correction to the (overline{B}_{s}) ({rightarrow }) (D_{s}^{(*)} {ell } bar{nu }_{ell }) decays
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-09 DOI: 10.1140/epjc/s10052-025-14131-y
Yueling Yang, Jiazhi Li, Liting Wang, Junfeng Sun
{"title":"The nonfactorizable QED correction to the (overline{B}_{s}) ({rightarrow }) (D_{s}^{(*)} {ell } bar{nu }_{ell }) decays","authors":"Yueling Yang,&nbsp;Jiazhi Li,&nbsp;Liting Wang,&nbsp;Junfeng Sun","doi":"10.1140/epjc/s10052-025-14131-y","DOIUrl":"10.1140/epjc/s10052-025-14131-y","url":null,"abstract":"<div><p>Considering the nonfactorizable QED corrections, the branching ratios and ratios of branching ratios <span>(R(D_{s}^{({*})}))</span> for the semileptonic <span>(overline{B}_{s})</span> <span>({rightarrow })</span> <span>(D_{s}^{(*)} {ell } bar{nu }_{ell })</span> decays are reevaluated. It is found that (a) the QED contributions can enhance the branching ratios and reduce the ratios <span>(R(D_{s}^{({*})}))</span>. (b) The <i>SU</i>(3) flavor symmetry holds basically well in the ratios <i>R</i>(<i>D</i>)-<span>(R(D^{*}))</span> for the semileptonic charmed <span>(overline{B}_{u,d,s})</span> decays. (c) The current theoretical uncertainties of branching ratios <span>(mathcal{B}(overline{B}_{s} {rightarrow } D_{s}^{*} {ell } bar{nu }_{ell }))</span> from the form factors are very large.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14131-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809313","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
Photon self-interaction through gravitons and axions
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-09 DOI: 10.1140/epjc/s10052-025-14116-x
Ahmad Hoseinpour, Moslem Zarei, Mehdi Abdi
{"title":"Photon self-interaction through gravitons and axions","authors":"Ahmad Hoseinpour,&nbsp;Moslem Zarei,&nbsp;Mehdi Abdi","doi":"10.1140/epjc/s10052-025-14116-x","DOIUrl":"10.1140/epjc/s10052-025-14116-x","url":null,"abstract":"<div><p>In this work, we propose to employ the concept of photon self-interaction for axion detection. In particular, we derive the interaction Hamiltonian for photons via axions in a ring cavity. We show that when the incoming photons are considered in plane-wave basis, the interaction vanishes. However, when the realistic case of photon wavepackets are assumed, a self-interaction whose strength is proportional to the size of the wavepacket and the cavity length exists. Under specific conditions, we find that the axion-mediated interaction dominates the gravitationally induced self-interaction. We discuss the implications of this setup for axion detection, focusing on the range of axion mass, <span>(10^{-10}~text {eV}&lt;m_a&lt;10^{-4}~text {eV})</span> for which the best accuracy of coupling constants is constrained in some cases to <span>(g_{agamma gamma }&gt; 9 times 10^{-12}~ text {GeV}^{-1})</span>.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14116-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809314","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信