Progress of Theoretical Physics最新文献_第4页

Neutrino Oscillation Physics Potential of the T2K Experiment T2K实验的中微子振荡物理势

Progress of Theoretical Physics Pub Date : 2015-01-01 DOI: 10.1093/ptep/ptv031

K. Abe, D. Autiero, O. Drapier, J. Dumarchez, S. Emery-Schrenk, V. Galymov, C. Giganti, M. Gonin, J. Marteau, E. Mazzucato, T. Mueller, B. Popov, B. Quilain, G. Vasseur, M. Zito

{"title":"Neutrino Oscillation Physics Potential of the T2K Experiment","authors":"K. Abe, D. Autiero, O. Drapier, J. Dumarchez, S. Emery-Schrenk, V. Galymov, C. Giganti, M. Gonin, J. Marteau, E. Mazzucato, T. Mueller, B. Popov, B. Quilain, G. Vasseur, M. Zito","doi":"10.1093/ptep/ptv031","DOIUrl":"https://doi.org/10.1093/ptep/ptv031","url":null,"abstract":"The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle $theta_{13}$ have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal $sin^22theta_{23}$, the octant of $theta_{23}$, and the mass hierarchy, in addition to the measurements of $delta_{CP}$, $sin^2theta_{23}$, and $Delta m^2_{32}$, for various combinations of $nu$-mode and $bar{nu}$-mode data-taking. With an exposure of $7.8times10^{21}$~protons-on-target, T2K can achieve 1-$sigma$ resolution of 0.050(0.054) on $sin^2theta_{23}$ and $0.040(0.045)times10^{-3}~rm{eV}^2$ on $Delta m^2_{32}$ for 100%(50%) neutrino beam mode running assuming $sin^2theta_{23}=0.5$ and $Delta m^2_{32} = 2.4times10^{-3}$ eV$^2$. T2K will have sensitivity to the CP-violating phase $delta_{rm{CP}}$ at 90% C.L. or better over a significant range. For example, if $sin^22theta_{23}$ is maximal (i.e $theta_{23}$=$45^circ$) the range is $-115^circ<delta_{rm{CP}}<-60^circ$ for normal hierarchy and $+50^circ<delta_{rm{CP}}<+130^circ$ for inverted hierarchy. When T2K data is combined with data from the NO$nu$A experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero $delta_{CP}$ is substantially increased compared to if each experiment is analyzed alone.","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/ptep/ptv031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61120377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Nucleon- and Antinucleon-Nucleon Elastic and Charge Exchange Processes 核子和反核子-核子弹性和电荷交换过程

Progress of Theoretical Physics Pub Date : 2013-05-16 DOI: 10.1143/PTPS.E67.53

Y. Sumi, Toshihiro Yoshida

引用次数: 0

Chapter II Superfluidity in Neutron Star Matter and Symmetric Nuclear Matter 第二章中子星物质和对称核物质的超流动性

Progress of Theoretical Physics Pub Date : 2013-05-16 DOI: 10.1143/PTPS.112.27

T. Takatsuka, R. Tamagaki

{"title":"Chapter II Superfluidity in Neutron Star Matter and Symmetric Nuclear Matter","authors":"T. Takatsuka, R. Tamagaki","doi":"10.1143/PTPS.112.27","DOIUrl":"https://doi.org/10.1143/PTPS.112.27","url":null,"abstract":"Nucleon superfluids which are realized in neutron star interior and symmetric nuclear matter are studied with use of realistic nuclear forces, in the density domain from the subnuclear region to about 3ρ_0 (ρ_0 being the nuclear density). It is shown that characteristic aspects of nuclear forces manifest themselves in the appearance of several kinds of nucleon superfluids, which strongly depends on the density ρ. In this chapter emphasis is put on the pairing correlations where strong noncentral (tensor and spin-orbit) forces play important roles. A theoretical framework applicable to the nonzero angular-momentum pairing including the coupling due to tensor force is given by extending the usual BCS-Bogoliubov theory for the ^1S_0 pairing (the zero angular-momentum one). This formulation has been applied to the ^3P_2+^3F_2 pairing in neutron matter (the dominant component of neutron stars) and the ^3S_1+^3D_1 pairing in symmetric nuclear matter. In the former case, although spin-orbit force mainly contributes to the ^3P_2 attraction, the tensor coupling with the ^3F_2 component assists to realize the ^3P_2 superfluid. In the latter case, the tensor coupling to the ^3D_1 component plays a vital role to realize the ^3S_1 superfluid with a large energy gap. Results of the energy gaps calculated for such nonzero angular-momentum pairings, as well as those for the ^1S_0 pairing, are shown. We have found the realization of the following nucleon superfluids; the neutron ^3P_2 superfluid and the proton ^1S_0 one in the fluid core of neutron stars at ρ≃(0.7∼3)ρ_0, the neutron ^1S_0 superfluid in the inner crust of neutron stars at ρ≃(10^−3∼0.5)ρ_0, and the ^3S_1 superfluid in symmetric nuclear matter at a wide range of ρ including ρ_0, contrary to the ^1S_0 one realized at ρ≲ρ_0/2. The properties of these superfluids and their implications are also discussed.","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"112 1","pages":"27-65"},"PeriodicalIF":0.0,"publicationDate":"2013-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64720748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

Quaternionic Variational Formalism for General Relativity in Riemann and Riemann-Cartan Space-Times 广义相对论在黎曼和黎曼-卡尔坦时空中的四元数变分形式

Progress of Theoretical Physics Pub Date : 2012-12-01 DOI: 10.1143/PTP.128.1107

K. Morita

{"title":"Quaternionic Variational Formalism for General Relativity in Riemann and Riemann-Cartan Space-Times","authors":"K. Morita","doi":"10.1143/PTP.128.1107","DOIUrl":"https://doi.org/10.1143/PTP.128.1107","url":null,"abstract":"It is shown that there exists a 2-dimensional matrix representation of complex quaternions over real quaternions, which allows to define Pauli matrix in 4 dimensions over the quaternionic field and leads to the quaternionic spinor group previously proposed. It is also attempted to apply complex quaternions to general relativity at the level of the variational formalism. Linear gravitational Lagrangian in Riemann-Cartan space-time U4 is derived using quaternion caluculus; namely scalar curvature in U4 is put into a quaternionic form. Consequently, Einstein-Hilbert Lagrangian in Riemann space R4 is also defined over quaternions, as first shown by Sachs. The matter fields coupled to gravity are assumed to be the scalar and the Dirac fields. The quaternionic variational formalism corresponds to the firstorder formalism but with a limited pattern of allowed fields such that the quaternionic fields carry only coordinate tensor indices but no local Lorentz indices which are contracted with that possessed by the basis of complex quaternions. In particular, both the quaternionic vierbein field and Lorentz gauge field (corresponding to the spin connection) are regarded as coordinate vectors which are independently varied, obtaining Einstein and Cartan equations, respectively. It is incidentally shown that the consistent condition of Einstein equation in U4 is proved via the variational formalism and the anti-symmetric part of Einstein equation together with Cartan equation in U4 leads to an identity which expresses the anti-symmetric part of the enegy-momentum tensor by means of the covariant divergence of the spin angular momentum tensor, both of Dirac field. We also present pedagogical proofs of Bianchi and Bach-Lanczos identities in U4 using the quaternionic formalism.","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"1107-1139"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.1107","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64011809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytic Methods in Open String Field Theory 开弦场论中的解析方法

Progress of Theoretical Physics Pub Date : 2012-12-01 DOI: 10.1143/PTP.128.1001

Y. Okawa

引用次数: 59

Synchronization Thresholds of Coupled Self-Excited Nonidentical Pendula Suspended on the Vertically Displacing Beam 悬挂在垂直位移梁上的耦合自激非同摆的同步阈值

Progress of Theoretical Physics Pub Date : 2012-12-01 DOI: 10.1143/PTP.128.1141

M. Kapitaniak, P. Brzeski, K. Czołczyński, aw Perlikowski, A. Stefański, T. Kapitaniak

引用次数: 10

Exact Stationary Solution Method for the Wadati-Konno-Ichikawa-Shimizu (WKIS) Equation wadati - kono - ichiawa - shimizu (WKIS)方程的精确平稳解方法

Progress of Theoretical Physics Pub Date : 2012-11-01 DOI: 10.1143/PTP.128.993

R. A. Gorder

引用次数: 8

Extrinsic Spin Hall Effect Due to Transition-Metal Impurities 过渡金属杂质引起的外源性自旋霍尔效应

Progress of Theoretical Physics Pub Date : 2012-11-01 DOI: 10.1143/PTP.128.805

Takuro Tanaka, H. Kontani

引用次数: 3

Gravitational Waves from a Particle in Circular Orbits around a Schwarzschild Black Hole to the 22nd Post-Newtonian Order 从环绕史瓦西黑洞的圆形轨道上的粒子发出的引力波到第22后牛顿阶

Progress of Theoretical Physics Pub Date : 2012-11-01 DOI: 10.1143/PTP.128.971

R. Fujita

{"title":"Gravitational Waves from a Particle in Circular Orbits around a Schwarzschild Black Hole to the 22nd Post-Newtonian Order","authors":"R. Fujita","doi":"10.1143/PTP.128.971","DOIUrl":"https://doi.org/10.1143/PTP.128.971","url":null,"abstract":"We extend our previous results of the 14th post-Newtonian (PN) order expansion of gravitational waves for a test particle in circular orbits around a Schwarzschild black hole to the 22PN order, i.e. v 44 beyond the leading Newtonian approximation where v is the orbital velocity of a test particle. Comparing our 22PN formula for the energy ﬂux with high precision numerical results, we ﬁnd that the relative error of the 22PN ﬂux at the innermost stable circular orbit is about 10 − 5 . We also estimate the phase diﬀerence between the 22PN waveforms and numerical waveforms after a two-year inspiral. We ﬁnd that the dephase is about 10 − 9 for μ/M = 10 − 4 and 10 − 2 for μ/M = 10 − 5 where μ is the mass of the compact object and M the mass of the central supermassive black hole. Finally, we construct a hybrid formula of the energy ﬂux by supplementing the 4PN formula of the energy ﬂux for circular and equatorial orbits around a Kerr black hole with all the present 22PN terms for the case of a Schwarzschild black hole. Comparing the hybrid formula with the the full numerical results, we examine the performance of the hybrid formula for the case of Kerr black hole.","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"971-992"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.971","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64016611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 56

New Period-Doubling and Equiperiod Bifurcations of the Reversible Area-Preserving Map 可逆保面积映射的新倍周期和等周期分岔

Progress of Theoretical Physics Pub Date : 2012-11-01 DOI: 10.1143/PTP.128.845

Y. Yamaguchi, K. Tanikawa

引用次数: 0