Authors:San-Min Ke; Wen-Li Yang, Ke-Xia Jang, Chun Wang, Xue-Min Shuai, Zhan-Yun Wang Gang Shi First page: 113101 Abstract: We have studied Yang-Baxter deformations of supercoset sigma models with ℤ 4 m grading. The
deformations are specified by a skew-symmetric classical r -matrix satisfying the classical
Yang-Baxter equations. The deformed action is constructed and the Lax pair is also presented. When m
=1, our results reduce to those of the type IIB Green-Schwarz superstring on AdS 5 × S 5 background
recently given by Kawaguchi, Matsumoto and Yoshida. Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/113101 Issue No:Vol. 41, No. 11 (2017)

Authors:Gorazd Cvetič; Francis Halzen, C. S. Kim Sechul Oh First page: 113102 Abstract: The universality of the weak interactions can be tested in semileptonic b → c transitions, and in
particular in the ratios R (D (*) ) ≡ Γ (B→D (*) τ ν )/ Γ (B→D (*) l ν ) (where l=μ or e). Due to
the recent differences between the experimental measurements of these observables by BaBar, Belle
and LHCb on the one hand and the Standard Model predicted values on the other hand, we study the
predicted ratios R (D (*) )= Γ (B→D (*) τ+“missing”)/ Γ (B→D (*) l ν ) in scenarios with an
additional sterile heavy neutrino of mass ∼1 GeV. Further, we evaluate the newly defined ratio R
(0)≡ Γ (B→τ+“missing”)/ Γ (B→μ ν ) in such scenarios, in view of the future possibilities of
measuring the quantity at Belle-II. Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/113102 Issue No:Vol. 41, No. 11 (2017)

Authors:Mustapha Maamache; Jeong Ryeol Choi First page: 113106 Abstract: While quantum-classical correspondence for a system is a very fundamental problem in modern physics,
the understanding of its mechanism is often elusive, so the methods used and the results of detailed
theoretical analysis have been accompanied by active debate. In this study, the differences and
similarities between quantum and classical behavior for an inverted oscillator have been analyzed
based on the description of a complete generalized Airy function-type quantum wave solution. The
inverted oscillator model plays an important role in several branches of cosmology and particle
physics. The quantum wave packet of the system is composed of many sub-packets that are localized at
different positions with regular intervals between them. It is shown from illustrations of the
probability density that, although the quantum trajectory of the wave propagation is somewhat
different from the corresponding classical one, the difference becomes relatively small when the
classical excitat... Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/113106 Issue No:Vol. 41, No. 11 (2017)

Authors:Yun-Guo Jiang; Jia-Zhen Liu Song He First page: 113107 Abstract: We make use of Manton’s analytical method to investigate the force between kinks and anti-kinks at
large distances in 1+1 dimensional field theory. The related potential has infinite order
corrections of exponential pattern, and the coefficients for each order are determined. These
coefficients can also be obtained by solving the equation of the fluctuations around the vacuum. At
the lowest order, the kink lattice represents the Toda lattice. With higher order correction terms,
the kink lattice can represent one kind of generic Toda lattice. With only two sites, the kink
lattice is classically integrable. If the number of sites of the lattice is larger than two, the
kink lattice is not integrable but is a near integrable system. We make use of Flaschka’s variables
to study the Lax pair of the kink lattice. These Flaschka’s variables have interesting algebraic
relations and non-integrability can be manifested. We also discuss the higher Hamiltonians for the
deformed open Toda lat... Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/113107 Issue No:Vol. 41, No. 11 (2017)

Authors:Min Liu; Yu Gao Ning Wang First page: 114101 Abstract: The statistical uncertainties of 13 model parameters in the Weizsäcker-Skyrme (WS*) mass model are
investigated for the first time with an efficient approach, and the propagated errors in the
predicted masses are estimated. The discrepancies between the predicted masses and the experimental
data, including the new data in AME2016, are almost all smaller than the model errors. For
neutron-rich heavy nuclei, the model errors increase considerably, and go up to a few MeV when the
nucleus approaches the neutron drip line. The most sensitive model parameter which causes the
largest statistical error is analyzed for all bound nuclei. We find that the two coefficients of
symmetry energy term significantly influence the mass predictions of extremely neutron-rich nuclei,
and the deformation energy coefficients play a key role for well-deformed nuclei around the β
-stability line. Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/114101 Issue No:Vol. 41, No. 11 (2017)

Authors:Peng Yin; Jianmin Dong Wei Zuo First page: 114102 Abstract: We have investigated the effect of tensor correlations on the depletion of the nuclear Fermi sea in
symmetric nuclear matter within the framework of the extended Brueckner-Hartree-Fock approach by
adopting the AV 18 two-body interaction and a microscopic three-body force. The contributions from
various partial wave channels including the isospin-singlet T =0 channel, the isospin-triplet T =1
channel and the T =0 tensor 3 SD 1 channel have been calculated. The T =0 neutron-proton
correlations play a dominant role in causing the depletion of nuclear Fermi sea. The T =0
correlation-induced depletion turns out to stem almost completely from the 3 SD 1 tensor channel.
The isospin-singlet T =0 3 SD 1 tensor correlations are shown to be responsible for most of the
depletion, which amounts to more than 70 percent of the total depletion in the density region c... Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/114102 Issue No:Vol. 41, No. 11 (2017)

Authors:Peng-Cheng Li; Hong-Fei Zhang Yong-Jia Wang First page: 114103 Abstract: The stability of super heavy nuclei (SHN) from Z =104 to Z =126 is analyzed systematically,
associated with the following theoretical mass tables: FRDM2012 [At. Data Nucl. Data Tables
109-110(2016)], WS2010 [Phys. Rev. C 82, 044304(2010)], WS-LZ-RBF [J. Phys. G: Nucl. Part. Phys. 42,
095107(2015)] and the updated experimental data AME2016 [Chinese Physics C 41, 040002(2017)]. The
nucleus with the biggest mean binding energy in each isotopic chain shows systematic regular
behavior, indicating that the mean binding energy is a good criterion to classify SHN by their
stability. Based on binding energy, the α -decay energy Q α , two-proton separation energy S 2 p ,
and two-neutron separation energy S 2 n are extracted and analyzed. It is found that N =152 and N
=162 are sub-magic numbers, N = 184 is a neutron magic number, and Z = 114 is a proton magic number,
which... Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/114103 Issue No:Vol. 41, No. 11 (2017)

Authors:Dong-Dong Ni; Zhong-Zhou Ren First page: 114104 Abstract: Very neutron-deficient nuclei are investigated with Woods-Saxon potentials, especially the newly
measured A =2 Z –1 nucleus 65 As [X.L. Tu et al., Phys. Rev. Lett. 106 , 112501 (2011)], where the
experimental proton separation energy is obtained as -90(85) keV for the first time. Careful
consideration is given to quasibound protons with outgoing Coulomb wave boundary conditions. The
observed proton halos in the first excited state of 17 F and in the ground states of 26,27,28 P are
reproduced well, and predictions of proton halos are made for the ground states of 56,57 Cu and 65
As. The sensitivity of the results to the proton separation energy is discussed in detail, together
with the effect of the ℓ =1 centrifugal barrier on proton halos. Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/114104 Issue No:Vol. 41, No. 11 (2017)

Authors:J. B. Wei; H. Chen H.-J. Schulze First page: 115101 Abstract: We study the properties of two-flavor quark matter in the Dyson-Schwinger model and investigate the
possible consequences for hybrid neutron stars, with particular regard to the two-solar-mass limit.
We find that with some extreme values of the model parameters, the mass fraction of two-flavor quark
matter in heavy neutron stars can be as high as 30 percent and the possible energy release during
the conversion from nucleonic neutron stars to hybrid stars can reach 10 52 erg. Citation: Chinese Physics C PubDate: 2017-10-23T23:00:00Z DOI: 10.1088/1674-1137/41/11/115101 Issue No:Vol. 41, No. 11 (2017)

Authors:Claudio O. Dib; C. S. Kim Kechen Wang First page: 103103 Abstract: We present a search strategy for both Dirac and Majorana sterile neutrinos from the purely leptonic
decays of W ± → e ± e ± μ ∓ ν and μ ± μ ± e ∓ ν at the 14 TeV LHC. The discovery and exclusion
limits for sterile neutrinos are shown using both the Cut-and-Count (CC) and Multi-Variate Analysis
(MVA) methods. We also discriminate between Dirac and Majorana sterile neutrinos by exploiting a set
of kinematic observables which differ between the Dirac and Majorana cases. We find that the MVA
method, compared to the more common CC method, can greatly enhance the discovery and discrimination
limits. Two benchmark points with sterile neutrino mass m N = 20 GeV and 50 GeV are tested. For an
integrated luminosity of 3000 fb −1 , sterile neutrinos can be found with 5 σ significance if
heavy-to-light neutrino mixings U Ne 2 ∼ ... Citation: Chinese Physics C PubDate: 2017-11-02T00:00:00Z DOI: 10.1088/1674-1137/41/10/103103 Issue No:Vol. 41, No. 10 (2017)