ITP OpenIR研究单元&专题: 理论物理所SCI论文
http://ir.itp.ac.cn/:80/handle/311006/211
Tue, 11 Dec 2018 12:13:50 GMT2018-12-11T12:13:50ZNetwork approaches to climate science
http://ir.itp.ac.cn/:80/handle/311006/22172
题名: Network approaches to climate science
作者: Fan, JF; Meng, J; Chen, XS; Ashkenazy, Y; Havlin, S; Fan, JF (reprint author), Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.; Chen, XS (reprint author), Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China.; Chen, XS (reprint author), Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China.Thu, 21 Dec 2017 07:50:22 GMThttp://ir.itp.ac.cn/:80/handle/311006/221722017-12-21T07:50:22ZProduction of charmed tetraquarks from B-c and B decays
http://ir.itp.ac.cn/:80/handle/311006/22171
题名: Production of charmed tetraquarks from B-c and B decays
作者: He, XG; Wang, W; Zhu, RL; Wang, W (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, INPAC, Shanghai 200240, Peoples R China.; Wang, W (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
摘要: Hadronic states composed of multi-quark flavors may exist in reality since they are not prohibited by quantum chromodynamics (QCD). Compact four-quark systems of a color singlet are classified as tetraquarks. To understand the properties of these states, more theoretical and experimental efforts are needed. In this work, we study charmed tetraquarks with three light flavors using flavor SU(3) symmetry. States with three different light quarks must be in a (6) over bar or a 15 multiplet. We investigate the production of charmed tetraquarks X-c in B -> X-c((X) over bar (c)) P and B-c -> XcP decays. Whether the states with three light quarks belong to (6) over bar or 15 can be determined by studying various tetraquark B and Bc decays. We demonstrate that the decay amplitudes for these decays can be parametrized by a few irreducible SU(3) invariant amplitudes. We then derive relations for decay widths and charge-parity-violating rate difference, which can be examined experimentally. Although no experimental measurements are available yet, they might be accessed at the ongoing and forthcoming experiments such as LHCb and Belle-II. Measurements of these observables can not only provide useful information for the study of exotics spectroscopy but also provide valuable information towards a better understanding of some non-perturbative aspects of QCD.Thu, 21 Dec 2017 07:50:21 GMThttp://ir.itp.ac.cn/:80/handle/311006/221712017-12-21T07:50:21ZOne-loop renormalization of the chiral Lagrangian for spinless matter fields in the SU(N) fundamental representation
http://ir.itp.ac.cn/:80/handle/311006/22170
题名: One-loop renormalization of the chiral Lagrangian for spinless matter fields in the SU(N) fundamental representation
作者: Du, ML; Guo, FK; Meissner, UG; Du, ML (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany.; Du, ML (reprint author), Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
摘要: We perform the leading one-loop renormalization of the chiral Lagrangian for spinless matter fields living in the fundamental representation of SU(N). The Lagrangian can also be applied to any theory with a spontaneous symmetry breaking of SU(N)(L) x SU(N)(R) to SU (N)(V). and spinless matter fields in the fundamental representation. For QCD, the matter fields can be kaons or pseudoscalar heavy mesons. Using the background field method and heat kernel expansion techniques, the divergences of the one-loop effective generating functional for correlation functions of single matter fields are calculated up to O(p(3)), where p denotes a small momentum or Goldstone boson mass. The divergences are absorbed by counterterms not only from the third order but also from the second order chiral Lagrangian.Thu, 21 Dec 2017 07:50:20 GMThttp://ir.itp.ac.cn/:80/handle/311006/221702017-12-21T07:50:20ZSystematical study of high-spin rotational bands in neutron-deficient Kr isotopes by the extended projected shell model
http://ir.itp.ac.cn/:80/handle/311006/22169
题名: Systematical study of high-spin rotational bands in neutron-deficient Kr isotopes by the extended projected shell model
作者: Wu, XY; Ghorui, SK; Wang, LJ; Kaneko, K; Sun, Y; Sun, Y (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China.; Sun, Y (reprint author), Shanghai Jiao Tong Univ, CICIFSA, Shanghai 200240, Peoples R China.; Sun, Y (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
摘要: We analyze the high-spin structure of the even even Kr72-80 isotopes using the Projected Shell Model (PSM). With the help of the Pfaffian formulas, we have vigorously extended the quasi-particle (qp) basis of the PSM code and applied in this mass region for the first time. We consider a sufficiently large multi-qp configuration space in order to describe high-spin rotational behavior. The results show that the calculation can reproduce most of the known rotational bands with positive- or negative-parity. Moreover, some side bands appearing in the near-yrast region are predicted. The main structure for each band is discussed in terms of multi-qp configurations. The variations in moment of inertia with spin are explained in terms of successive band crossings among the 2-qp, 4-qp, 6-qp, and 8-qp states. The B(E2) transition probabilities in these bands are also calculated. To further understand the high-spin behavior of these neutron-deficient nuclei and to confirm predictions of the present work, good high-spin data, especially for B(E2) transitions, are called for. (C) 2016 Elsevier B.V. All rights reserved.Thu, 21 Dec 2017 07:50:19 GMThttp://ir.itp.ac.cn/:80/handle/311006/221692017-12-21T07:50:19ZEnhancement of high-spin collectivity in N = Z nuclei by the isoscalar neutron-proton pairing
http://ir.itp.ac.cn/:80/handle/311006/22168
题名: Enhancement of high-spin collectivity in N = Z nuclei by the isoscalar neutron-proton pairing
作者: Kaneko, K; Sun, Y; de Angelis, G; Sun, Y (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China.; Sun, Y (reprint author), Shanghai Jiao Tong Univ, CICIFSA, Shanghai 200240, Peoples R China.; Sun, Y (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
摘要: Pairing from different fermions, neutrons and protons, is unique in nuclear physics. The fingerprint for the isoscalar T = 0 neutron-proton (np) pairing has however remained a question. We study this exotic pairing mode in excited states of rotating N approximate to Z nuclei by applying the state-of-the-art shell-model calculations for Ru-88 and the neighboring Ru-90,Ru-92 isotopes. We show that the T = 0 np pairing is responsible for the distinct rotational behavior between the N = Z and N > Z nuclei. Our calculation suggests a gradual crossover from states with mixed T =1 and T = 0 pairing near the ground state to those dominated by the T = 0 np pairing at high spins. It is found that the T = 0 np pairing plays an important role in enhancing the high-spin collectivity, thereby reducing shape variations along the N = Z line. (C) 2016 Elsevier B.V. All rights reserved.Thu, 21 Dec 2017 07:50:18 GMThttp://ir.itp.ac.cn/:80/handle/311006/221682017-12-21T07:50:18ZExact solution of the two-axis countertwisting Hamiltonian
http://ir.itp.ac.cn/:80/handle/311006/22167
题名: Exact solution of the two-axis countertwisting Hamiltonian
作者: Pan, F; Zhang, YZ; Draayer, JP; Zhang, YZ (reprint author), Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia.
摘要: It is shown that the two-axis countertwisting Hamiltonian is exactly solvable when the quantum number of the total angular momentum of the system is an integer after the Jordan-Schwinger (differential) boson realization of the SU(2) algebra. Algebraic Bethe ansatz is used to get the exact solution with the help of the SU(1,1) algebraic structure, from which a set of Bethe ansatz equations of the problem is derived. It is shown that solutions of the Bethe ansatz equations can be obtained as zeros of the Heine Stieltjes polynomials. The total number of the four sets of the zeros equals exactly 2J + 1 for a given integer angular momentum quantum number J, which proves the completeness of the solutions. It is also shown that double degeneracy in level energies may also occur in the J -> infinity limit for integer J case except a unique non-degenerate level with zero excitation energy. (C) 2016 Elsevier Inc. All rights reserved.Thu, 21 Dec 2017 07:50:17 GMThttp://ir.itp.ac.cn/:80/handle/311006/221672017-12-21T07:50:17ZGravitational Quasinormal Modes of Regular Phantom Black Hole
http://ir.itp.ac.cn/:80/handle/311006/22166
题名: Gravitational Quasinormal Modes of Regular Phantom Black Hole
作者: Li, J; Lin, K; Wen, H; Qian, WL; Li, J (reprint author), Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China.; Li, J (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
摘要: We investigate the gravitational quasinormal modes (QNMs) for a type of regular black hole (BH) known as phantom BH, which is a static self-gravitating solution of a minimally coupled phantom scalar field with a potential. The studies are carried out for three different spacetimes: asymptotically flat, de Sitter (dS), and anti-de Sitter (AdS). In order to consider the standard odd parity and even parity of gravitational perturbations, the corresponding master equations are derived. The QNMs are discussed by evaluating the temporal evolution of the perturbation field which, in turn, provides direct information on the stability of BH spacetime. It is found that in asymptotically flat, dS, and AdS spacetimes the gravitational perturbations have similar characteristics for both odd and even parities. The decay rate of perturbation is strongly dependent on the scale parameter.., which measures the coupling strength between phantom scalar field and the gravity. Furthermore, through the analysis of Hawking radiation, it is shown that the thermodynamics of such regular phantom BH is also influenced by b. The obtained results might shed some light on the quantum interpretation of QNM perturbation.Thu, 21 Dec 2017 07:50:15 GMThttp://ir.itp.ac.cn/:80/handle/311006/221662017-12-21T07:50:15ZPhysics in the early universe
http://ir.itp.ac.cn/:80/handle/311006/22165
题名: Physics in the early universe
作者: Huang, QG; Huang, QG (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190, Peoples R China.; Huang, QG (reprint author), Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China.
摘要: In this paper, I will give a brief overview of the physics in the early universe, in particular, the inflation scenario. The predictions and the latest constraints on the inflation models will be discussed in detail.Thu, 21 Dec 2017 07:50:14 GMThttp://ir.itp.ac.cn/:80/handle/311006/221652017-12-21T07:50:14ZEffect of Phantom Dark Energy on Holographic Thermalization
http://ir.itp.ac.cn/:80/handle/311006/22163
题名: Effect of Phantom Dark Energy on Holographic Thermalization
作者: Zeng, XX; Hu, XY; Li, LF; Hu, XY (reprint author), Chongqing Jiaotong Univ, Sch Econ & Management, Chongqing 400074, Peoples R China.
摘要: Holographic thermalization for a black hole surrounded by phantom dark energy is probed. The result shows that the smaller the phantom dark energy parameter is, the easier the is plasma to thermalize as the chemical potential is fixed, the larger the chemical potential is, and the harder the plasma is to thermalize as the dark energy parameter is fixed. The thermalization velocity and thermalization acceleration are presented by fitting the thermalization curves.Thu, 21 Dec 2017 07:50:13 GMThttp://ir.itp.ac.cn/:80/handle/311006/221632017-12-21T07:50:13ZPreface
http://ir.itp.ac.cn/:80/handle/311006/22164
题名: Preface
作者: Huang, QG; Wang, Y; Huang, QG (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100864, Peoples R China.Thu, 21 Dec 2017 07:50:13 GMThttp://ir.itp.ac.cn/:80/handle/311006/221642017-12-21T07:50:13Z