Journal of High Energy Physics最新文献

One point functions in large N vector models at finite chemical potential 一个点在有限化学势下的大N向量模型中起作用

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-15 DOI: 10.1007/JHEP01(2025)080

Justin R. David, Srijan Kumar

{"title":"One point functions in large N vector models at finite chemical potential","authors":"Justin R. David, Srijan Kumar","doi":"10.1007/JHEP01(2025)080","DOIUrl":"10.1007/JHEP01(2025)080","url":null,"abstract":"We evaluate the thermal one point function of higher spin currents in the critical model of U(N) complex scalars interacting with a quartic potential and the U(N) Gross-Neveu model of Dirac fermions at large N and strong coupling using the Euclidean inversion formula. These models are considered in odd space time dimensions d and held at finite temperature and finite real chemical potential μ measured in units of the temperature. We show that these one point functions simplify both at large spin and large d. At large spin, the one point functions behave as though the theory is free, the chemical potential appears through a simple pre-factor which is either cosh μ or sinh μ depending on whether the spin is even or odd. At large d, but at finite spin and chemical potential, the 1-point functions are suppressed exponentially in d compared to the free theory. We study a fixed point of the critical Gross-Neveu model in d = 3 with 1-point functions exhibiting a branch cut in the chemical potential plane. The critical exponent for the free energy or the pressure at the branch point is 3/2 which coincides with the mean field exponent of the Lee-Yang edge singularity for repulsive core interactions.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP01(2025)080.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994475","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

Electroweak phase transition in two scalar singlet model with pNGB dark matter 含pNGB暗物质的双标量单重态模型的电弱相变

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-15 DOI: 10.1007/JHEP01(2025)078

Dilip Kumar Ghosh, Koustav Mukherjee, Shourya Mukherjee

{"title":"Electroweak phase transition in two scalar singlet model with pNGB dark matter","authors":"Dilip Kumar Ghosh, Koustav Mukherjee, Shourya Mukherjee","doi":"10.1007/JHEP01(2025)078","DOIUrl":"10.1007/JHEP01(2025)078","url":null,"abstract":"We investigate the dynamics of the electroweak phase transition within an extended Standard Model framework that includes one real scalar (Φ) and one complex scalar (S), both of which are SM gauge singlets. The global U(1) symmetry is softly broken to a ( {mathcal{Z}}_3 ) symmetry by the S3 term in the scalar potential. After this U(1) symmetry breaking, the imaginary component of the complex scalar (S) acts as a pseudo-Nambu-Goldstone boson (pNGB) dark matter candidate, naturally stabilized by the ( {mathcal{Z}}_2 ) symmetry of the scenario. Specially, the spontaneous breaking of the global U(1) symmetry to a discrete ( {mathcal{Z}}_3 ) subgroup can introduce effective cubic terms in the scalar potential, which facilitates a strong first-order phase transition. We analyze both single-step and multi-step first-order phase transitions, identifying the parameter space that satisfies the dark matter relic density constraints, complies with all relevant experimental constraints, and exhibits a strong first-order electroweak phase transition. The interplay of these criteria significantly restricts the model parameter space, often leading to an underabundant relic density. Moreover, we delve into the gravitational wave signatures associated with this framework, offering valuable insights that complement traditional dark matter direct and indirect detection methods.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP01(2025)078.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994478","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

Electroweak W+W+ production in association with three jets at NLO QCD matched with parton shower 电弱W+W+的产生与NLO QCD的三个射流相匹配，并与部分子阵雨相匹配

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-15 DOI: 10.1007/JHEP01(2025)075

Barbara Jäger, Santiago Lopez Portillo Chavez

引用次数: 0

LREE of a dressed Dp-brane with transverse motion in the partially compact spacetime 部分紧化时空中具有横向运动的修饰dp膜的轻ree

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-15 DOI: 10.1007/JHEP01(2025)079

Hamidreza Daniali, Davoud Kamani

引用次数: 0

Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs UPCs中轻子和重夸克对产生的方位不对称性

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-15 DOI: 10.1007/JHEP01(2025)076

Daniël Boer, Luca Maxia, Cristian Pisano

{"title":"Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs","authors":"Daniël Boer, Luca Maxia, Cristian Pisano","doi":"10.1007/JHEP01(2025)076","DOIUrl":"10.1007/JHEP01(2025)076","url":null,"abstract":"Azimuthal modulations in lepton and heavy-quark pair production in ultraperipheral collisions (UPCs) of highly charged ions are investigated. The modulations in the azimuthal angles of the sum and difference of the transverse momenta of the pair of particles in the final state, as well as of the transverse impact parameter, arise from the collisions of unpolarized and polarized photons. A full description of the cross section in terms of Generalized Transverse Momentum Dependent parton distributions (GTMDs) for photons is given including a careful consideration of the Fourier transform to impact parameter space. In particular, this leads to a feed-in mechanism among harmonics of different orders, which in principle generates harmonics of all (even) orders. Wherever comparable, our analytical results for the azimuthal modulations agree with those presented in other papers on this topic. Compared to these other works, we separate effects that arise from the anisotropies of the GTMDs from those that do not and retain terms proportional to the mass of the produced particles, as they are relevant for muon, charm and bottom quark production. We show that the normalized differential cross section changes considerably with the produced particle mass, which should be discernible in UPCs at RHIC and LHC. For the numerical results we adopt several models for the photon GTMD correlator, and find that all of them are in fairly good agreement with each other and with UPC data from STAR. We also present results for various azimuthal modulations for RHIC kinematics, where we compare e+e− production with the production of heavier particles, and for LHC kinematics, focusing on μ+μ− production. These results exhibit interesting mass-dependent features in the asymmetries that may help study the anisotropies arising from the underlying photon GTMD description.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP01(2025)076.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994477","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

Holographic Renyi entropy of 2d CFT in KdV generalized ensemble 广义系综中二维CFT全息Renyi熵

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-14 DOI: 10.1007/JHEP01(2025)067

Liangyu Chen, Anatoly Dymarsky, Jia Tian, Huajia Wang

{"title":"Holographic Renyi entropy of 2d CFT in KdV generalized ensemble","authors":"Liangyu Chen, Anatoly Dymarsky, Jia Tian, Huajia Wang","doi":"10.1007/JHEP01(2025)067","DOIUrl":"10.1007/JHEP01(2025)067","url":null,"abstract":"The eigenstate thermalization hypothesis (ETH) in chaotic two dimensional CFTs is subtle due to infinitely many conserved KdV charges. Previous works have demonstrated that primary CFT eigenstates have flat entanglement spectrum, which is very different from the microcanonical ensemble. This result is an apparent contradiction to conventional ETH, which does not take KdV charges into account. In a companion paper [1], we resolve this discrepancy by studying the subsystem entropy of a chaotic CFT in KdV-generalized Gibbs and microcanonical ensembles. In this paper, we carry out parallel computations in the context of AdS/CFT. We focus on the high density limit, which is equivalent to thermodynamic limit in conformal theories. In this limit holographic Renyi entropy can be computed using the so-called gluing construction. We explicitly study the KdV-generalized microcanonical ensemble with the densities of the first two KdV charges ( leftlangle {mathcal{Q}}_1rightrangle ) = q1, ( leftlangle {mathcal{Q}}_3rightrangle ) = q3 fixed and obeying q3 − ( {q}_1^2ll {q}_1^2 ). In this regime we found that the refined Renyi entropy ( {overset{sim }{S}}_n ) is n-independent for n > ncut, where ncut depends on q1, q3. By taking the primary state limit q3 → ( {q}_1^2 ), we recover flat entanglement spectrum characteristic of fixed-area states, in agreement with the primary state behavior. This provides a consistency check of the KdV-generalized ETH in 2d CFTs.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP01(2025)067.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994365","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

The edge of random tensor eigenvalues with deviation 带偏差的随机张量特征值的边缘

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-14 DOI: 10.1007/JHEP01(2025)071

Nicolas Delporte, Naoki Sasakura

引用次数: 0

Tridiagonal Hamiltonians modeling the density of states of the double-scaled SYK model 双尺度SYK模型的态密度的三对角哈密顿量

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-14 DOI: 10.1007/JHEP01(2025)072

Pratik Nandy

引用次数: 0

Kodaira-Spencer anomalies with Stora-Zumino method 用Stora-Zumino方法研究Kodaira-Spencer异常

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-14 DOI: 10.1007/JHEP01(2025)073

Davide Rovere

引用次数: 0

Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP 在大型强子对撞机（LHC）远距探测器和船舶上寻找与轴子样粒子耦合的重中性轻子

IF 5.4 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-01-14 DOI: 10.1007/JHEP01(2025)070

Zeren Simon Wang, Yu Zhang, Wei Liu

{"title":"Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP","authors":"Zeren Simon Wang, Yu Zhang, Wei Liu","doi":"10.1007/JHEP01(2025)070","DOIUrl":"10.1007/JHEP01(2025)070","url":null,"abstract":"In hidden-sector models, axion-like particles (ALPs) can couple to heavy neutral leptons (HNLs), leading to rich phenomenologies. We study ALPs produced from D- and B-meson decays via quark-flavor-violating couplings, and decaying exclusively into a pair of HNLs which mix with active neutrinos. The ALP can be either short- or long-lived, depending on the masses of the ALP and the HNL, as well as the corresponding coupling strength. Such GeV-scale HNLs are necessarily long-lived given the current bounds on their mixing parameters. We assess the sensitivities of the LHC far detectors and SHiP, to the long-lived HNLs in such theoretical scenarios. We find that for currently allowed values of the ALP couplings, most of these experiments can probe the active-sterile-neutrino mixing parameters multiple orders of magnitude beyond the present bounds, covering large parameter region targeted with the type-I seesaw mechanism. In addition, our results show that compared to the case of a promptly decaying ALP, assuming an ALP of longer lifetimes weakens the sensitivities of the considered experiments to the long-lived HNLs.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP01(2025)070.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994367","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