Progress of Theoretical and Experimental Physics最新文献_第4页

Asymptotic Weak Gravity Conjecture in M-theory on K3 × K3 K3 × K3 上 M 理论中的渐近弱引力猜想

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-24 DOI: 10.1093/ptep/ptae100

M Charkaoui, R Sammani, E H Saidi, R Ahl Laamara

{"title":"Asymptotic Weak Gravity Conjecture in M-theory on K3 × K3","authors":"M Charkaoui, R Sammani, E H Saidi, R Ahl Laamara","doi":"10.1093/ptep/ptae100","DOIUrl":"https://doi.org/10.1093/ptep/ptae100","url":null,"abstract":"The Asymptotic WGC has been proposed as a special case of the tower WGC that probes infinite distances in the moduli space corresponding to weakly coupled gauge regimes. The conjecture has been studied in M-theory on Calabi-Yau threefold (CY3) with finite volume inducing a 5D effective QFT. In this paper, we extend the scope of the previous study to encompass lower dimensions, particularly we generalise the obtained 5D asymptotic WGC to the effective field theory (EFT$_{3D}$) coupled to 3D gravity that descends from M-theory compactified on Calabi-Yau fourfold with an emphasis on $K3times K3$. We find that the CY4 has three fibration structures labelled as line Type-$mathbb {T}^{2}$, surface Type-$mathbb {S}$ and bulk Type-$mathbb {V}$. The emergent EFT$_{3D}$ is shown to have 2+2 towers of particles states termed as the BPS $mathcal {T}_{M_{mathrm{k}}rightarrow 0}^{rm{small {BPS}}}$ and $mathcal {T}_{M_{mathrm{k}}rightarrow infty }^{rm{small {BPS}}}$ as well as the non-BPS $mathcal {T}_{M_{mathrm{k}}rightarrow 0}^{rm{small {N-BPS}}}$ and $mathcal {T}_{M_{mathrm{k}}rightarrow infty }^{rm{small {N-BPS}}}$. To ensure the viability of the 3D Asymptotic WGC, we give explicit calculations to thoroughly test the swampland constraint for both the weakly and strongly gauge coupled regimes. Additional aspects, including the gauge symmetry breaking and duality symmetry are also investigated.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"6 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Strebel differentials and string field theory 斯特雷贝尔微分和弦场论

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-22 DOI: 10.1093/ptep/ptae099

Nobuyuki Ishibashi

引用次数: 0

Anisotropic einstein universes with a global magetic field and SqK-spinors 具有全局磁场和 SqK-旋子的各向异性爱因斯坦宇宙

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-21 DOI: 10.1093/ptep/ptae098

Satsuki Matsuno, Fumihiro Ueno

引用次数: 0

Probing New Physics in light of recent developments in b → cℓν transitions 从 b → cℓν 转变的最新发展探索新物理学

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-14 DOI: 10.1093/ptep/ptae086

Tahira Yasmeen, Ishtiaq Ahmed, Saba Shafaq, Muhammad Arslan, Muhammad Jamil Aslam

{"title":"Probing New Physics in light of recent developments in b → cℓν transitions","authors":"Tahira Yasmeen, Ishtiaq Ahmed, Saba Shafaq, Muhammad Arslan, Muhammad Jamil Aslam","doi":"10.1093/ptep/ptae086","DOIUrl":"https://doi.org/10.1093/ptep/ptae086","url":null,"abstract":"The experimental studies of the observables associated with the b → c transitions in the semileptonic B − meson decays at BaBar, Belle and LHCb have shown some deviations from the Standard Model (SM) predictions, consequently, providing a handy tool to probe the possible new physics (NP). In this context, we have first revisited the impact of recent measurements of R(D(*)) and R(Λc) on the parametric space of the NP scenarios. In addition, we have included the R(J/ψ) data in the analysis and found that their influence on the best-fit points and the parametric space is mild. Using the recent HFLAV data, after validating the well established sum rule of R(Λc), we derived the similar sum rule for R(J/ψ). Furthermore, according to the updated data, we have modified the correlation among the different observables, giving us their interesting interdependence. Finally, to discriminate the various NP scenarios, we have plotted the different angular observables and their ratios for B → D*τντ against the transfer momentum square (q2), using the 1σ and 2σ parametric space of considered NP scenarios. By implementing the collider bounds on NP Wilson coefficients, we find that, in the parametric space of some NP WCs is significantly restrained. To see the clear influence of NP on the amplitude of the angular observables, we have also calculated their numerical values in different q2 bins and shown them through the bar plots. We hope their precise measurements will help to discriminate various NP scenarios.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"35 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Neutrino phenomenology and keV dark matter in 2HDM with A4 symmetry 具有 A4 对称性的 2HDM 中的中微子现象学和 keV 暗物质

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-13 DOI: 10.1093/ptep/ptae089

V V Vien

引用次数: 0

T-Minkowski noncommutative spacetimes I: Poincaré groups, differential calculi and braiding T-Minkowski 非交换时空 I：庞加莱群、微分计算和编织

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-11 DOI: 10.1093/ptep/ptae088

Flavio Mercati

{"title":"T-Minkowski noncommutative spacetimes I: Poincaré groups, differential calculi and braiding","authors":"Flavio Mercati","doi":"10.1093/ptep/ptae088","DOIUrl":"https://doi.org/10.1093/ptep/ptae088","url":null,"abstract":"This paper introduces and investigates a class of noncommutative spacetimes that I will call “T-Minkowski,” whose quantum PoincarÃ© group of isometries exhibits unique and physically motivated characteristics. Notably, the coordinates on the Lorentz subgroup remain commutative, while the deformation is confined to the translations (hence the T in the name), which act like an integrable set of vector fields on the Lorentz group. This is similar to Majid’s bicrossproduct construction, although my approach allows the description of spacetimes with commutators that include a constant matrix as well as terms that are linear in the coordinates (the resulting structure is that of a centrally-extended Lie algebra). Moreover, I require that one can define a covariant braided tensor product representation of the quantum Poincaré group, describing the algebra of N-points. This also implies that a 4-dimensional bicovariant differential calculus exists on the noncommutative spacetime. The resulting models can all be described in terms of a numerical triangular R-matrix through RTT relations (as well as RXX, RXY and RXdX relations for the homogeneous spacetime, the braiding and the differential calculus). The R-matrices I find are in one-to-one correspondence with the triangular r-matrices on the Poincaré group without quadratic terms in the Lorentz generators. These have been classified, up to automorphisms, by Zakrzewski, and amount to 16 inequivalent models. This paper is the first of a series, focusing on the identification of all the quantum Poincaré groups that are allowed by my assumptions, as well as the associated quantum homogeneous spacetimes, differential calculi and braiding constructions.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"80 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Gravitational waves from first-order phase transition in an electroweakly interacting vector dark matter model 电弱相互作用矢量暗物质模型中一阶相变产生的引力波

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-06-10 DOI: 10.1093/ptep/ptae087

Tomohiro Abe, Katsuya Hashino

{"title":"Gravitational waves from first-order phase transition in an electroweakly interacting vector dark matter model","authors":"Tomohiro Abe, Katsuya Hashino","doi":"10.1093/ptep/ptae087","DOIUrl":"https://doi.org/10.1093/ptep/ptae087","url":null,"abstract":"We discuss gravitational waves in an electroweakly interacting vector dark matter model. In the model, the electroweak gauge symmetry is extended to SU(2)0 × SU(2)1 × SU(2)2 × U(1)Y and spontaneously broken into SU(2)L × U(1)Y at TeV scale. The model has an exchange symmetry between SU(2)0 and SU(2)2. This symmetry stabilizes some massive vector bosons associated with the spontaneous symmetry breaking described above, and an electrically neutral one is a dark matter candidate. In the previous study, it was found that the gauge couplings of SU(2)0 and SU(2)1 are relatively large to explain the measured value of the dark matter energy density via the freeze-out mechanism. With the large gauge couplings, the gauge bosons potentially have a sizable effect on the scalar potential. In this paper, we focus on the phase transition of SU(2)0 × SU(2)1 × SU(2)2 → SU(2)L. We calculate the effective potential at finite temperature and find that the phase transition is first-order and strong in a wide range of the parameter space. The strong first-order phase transition generates gravitational waves. We calculate the gravitational wave spectrum and find that it is possible to detect the gravitational waves predicted in the model by future space-based gravitational wave interferometers. We explore the regions of the parameter space probed by the gravitational wave detection. We find that the gravitational wave detection can probe the region where the mass of h′, a CP-even scalar in the model, is a few TeV.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Semi-leptonic W decay to B meson with lepton pairs in HQET factorization upto O 半轻子 W 衰变为 B 介子与轻子对的 HQET 因子化，直到 O

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-31 DOI: 10.1093/ptep/ptae080

Saadi Ishaq, Sajawal Zafar, Abdur Rehman, Ishtiaq Ahmed

{"title":"Semi-leptonic W decay to B meson with lepton pairs in HQET factorization upto O","authors":"Saadi Ishaq, Sajawal Zafar, Abdur Rehman, Ishtiaq Ahmed","doi":"10.1093/ptep/ptae080","DOIUrl":"https://doi.org/10.1093/ptep/ptae080","url":null,"abstract":"Motivated by the study of heavy-light meson production within the framework of heavy quark effective theory (HQET) factorization, we extend the factorization formalism for rather a complicated process W+ → B+ℓ+ℓ− in the limit of non-zero invariant squared-mass of dilepton, q2, at the lowest order in 1/mb up to $mathcal {O}(alpha _s)$. The purpose of the current study is to extend the HQET factorization formula for the W+ → B+ℓ+ℓ− process and subsequently compute the form factors for this channel up to next-to-leading order (NLO) corrections in αs. We explicitly show the amplitude of the W+ → B+ℓ+ℓ− process can also be factorized into a convolution between the perturbatively calculable hard-scattering kernel and the non-perturbative yet universal light-cone distribution amplitude (LCDA) defined in HQET. The validity of HQET factorization depends on the assumed scale hierarchy mW ∼ mb ≫ ΛQCD. Within the HQET framework, we evaluate the form factors associated with the W+ → B+ℓ+ℓ− process, providing insights into its phenomenology. In addition, we also perform an exploratory phenomenological study on W+ → B+ℓ+ℓ− by employing an exponential model for the LCDAs for B+ meson. Our findings reveal that the branching ratio for W+ → B+ℓ+ℓ− is below 10−10. Although the branching ratios are small, this channel in high luminosity LHC experiments may serve to further constraints the value of λB.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"40 7 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Collective excitations of self-gravitating bose-einstein condensates: Breathing mode and appearance of anisotropy under self-gravity 自重力玻色-爱因斯坦凝聚体的集体激发：自引力下的呼吸模式和各向异性的出现

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-29 DOI: 10.1093/ptep/ptae078

Kenta Asakawa, Hideki Ishihara, Makoto Tsubota

{"title":"Collective excitations of self-gravitating bose-einstein condensates: Breathing mode and appearance of anisotropy under self-gravity","authors":"Kenta Asakawa, Hideki Ishihara, Makoto Tsubota","doi":"10.1093/ptep/ptae078","DOIUrl":"https://doi.org/10.1093/ptep/ptae078","url":null,"abstract":"We investigate the collective mode of a self-gravitating Bose-Einstein condensate (BEC) described by the Gross-Pitaevskii-Poisson (GPP) equations. The self-gravitating BEC has garnered considerable attention in cosmology and astrophysics, being proposed as a plausible candidate for dark matter. Our inquiry delves into the breathing and anisotropic collective modes by numerically solving the GPP equations and using the variational method. The breathing mode demonstrates a reduction in period with increasing total mass due to the density dependence of the self-gravitating BEC, attributed to the density-dependent nature of self-gravitating BECs, aligning quantitatively with our analytical findings. Additionally, we investigate an anisotropic collective mode in which the quadrupole mode intertwines with the breathing mode. The period of the quadrupole mode exhibits similar total mass dependence to that of the breathing mode. The characteristics of these periods differ from those of a conventional BEC confined by an external potential. Despite the differences in density dependence, the ratio of their periods equals that of the BEC confined by an isotropic harmonic potential. Furthermore, an extension of the variational method to a spheroidal configuration enables the isolation of solely the quadrupole mode from the anisotropic collective mode.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"6 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Generator coordinate method with proton–neutron pairing fluctuations and magnetic properties of N = Z odd–odd nuclei 具有质子-中子配对波动的发电机坐标法和 N = Z 奇多核的磁特性

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-14 DOI: 10.1093/ptep/ptae072

K Uzawa, N Hinohara, T Nakatsukasa

引用次数: 0