## 2019 Vol. 43, No. 10

Display Method: |

2019, 43(10): 103001. doi: 10.1088/1674-1137/43/10/103001

**Abstract:**

We study the sensitivity of constraining the model independent

*H*

*ZZ*coupling based on the effective theory up to dimension-6 operators at a future Higgs factory. Using the current conceptual design parameters of the Circular Electron Positron Collider, we give the experimental limits for the model independent operators given by the total Higgsstrahlung cross-section and the angular distribution of

*Z*boson decays. In particular, we give the very small sensitivity limit for the CP violation parameter

2019, 43(10): 103101. doi: 10.1088/1674-1137/43/10/103101

**Abstract:**

Using symmetry properties, we determine the mixing pattern of a class of nonlocal quark bilinear operators containing a straight Wilson line along a spatial direction. We confirm the previous study that mixing among the lowest dimensional operators, which have a mass dimension equal to three, can occur if chiral symmetry is broken in the lattice action. For higher dimensional operators, we find that the dimension-three operators will always mix with dimension-four operators, even if chiral symmetry is preserved. Also, the number of dimension-four operators involved in the mixing is large, and hence it is impractical to remove the mixing by the improvement procedure. Our result is important for determining the Bjorken-

*x*dependence of the parton distribution functions using the quasi-distribution method on a Euclidean lattice. The requirement of using large hadron momentum in this approach makes the control of errors from dimension-four operators even more important.

2019, 43(10): 103102. doi: 10.1088/1674-1137/43/10/103102

**Abstract:**

We study the phenomenology of a model that addresses the neutrino mass, dark matter, and generation of the electroweak scale in a single framework. Electroweak symmetry breaking is realized via the Coleman-Weinberg mechanism in a classically scale invariant theory, while the neutrino mass is generated radiatively through interactions with dark matter in a typically scotogenic manner. The model introduces a scalar triplet and singlet and a vector-like fermion doublet that carry an odd parity of

2019, 43(10): 103103. doi: 10.1088/1674-1137/43/10/103103

**Abstract:**

In this exploratory study, near-threshold scattering of

*D*and

2019, 43(10): 103104. doi: 10.1088/1674-1137/43/10/103104

**Abstract:**

Motivated by the rapid development of heavy flavor physics experiments, we study the tree-dominated nonleptonic

2019, 43(10): 103105. doi: 10.1088/1674-1137/43/10/103105

**Abstract:**

We consider chiral perturbation theory with an explicit broad

*σ*-meson and study its contribution to the scalar form factors of the pion and the nucleon. Our goal is to learn more about resonance saturation in the scalar sector.

2019, 43(10): 103106. doi: 10.1088/1674-1137/43/10/103106

**Abstract:**

There are different constructions of the flux of triad in loop quantum gravity, namely the fundamental and alternative flux operators. In parallel to the consistency check on the two versions of operator by the algebraic calculus in the literature, we check their consistency by the graphical calculus. Our calculation based on the original Brink graphical method is obviously simpler than the algebraic calculation. It turns out that our consistency check fixes the regulating factor

2019, 43(10): 104101. doi: 10.1088/1674-1137/43/10/104101

**Abstract:**

The spallation cross-section data for the long-lived fission products (LLFPs) are scarce but required for the design of accelerator driven systems. In this paper, the isospin dependent quantum molecular dynamics model and the statistical code GEMINI are applied to simulate deuteron-induced spallation in the energy region of GeV/nucleon. By comparing the calculations with the experimental data, the applicability of the model is verified. The model is then applied to simulate the spallation of

^{90}Sr,

^{93}Zr,

^{107}Pd, and

^{137}Cs induced by deuterons at 200, 500 and 1000 MeV/nucleon. The cross-sections of isotopes, the cross-sections of long-lived nuclei, and the reaction energy are presented. Using the above observables, the feasibility of LLFP transmutation by spallation is discussed.

2019, 43(10): 104102. doi: 10.1088/1674-1137/43/10/104102

**Abstract:**

Excited states of odd-odd nucleus

^{92}Nb and odd-A nucleus

^{93}Nb were populated in the

^{6}Li+

^{89}Y reaction with an incident energy of 34 MeV. The processes that produce

^{92,93}Nb and can be measured by a combination of light charged particle and gamma ray measurements are discussed. Twenty new transitions are observed and eight new levels are constructed in

^{92}Nb, and in addition two new transitions are added to the level scheme of

^{93}Nb. Using shell model calculations, the low-lying structure of

^{92}Nb is investigated and compared with the experimental results.

2019, 43(10): 104103. doi: 10.1088/1674-1137/43/10/104103

**Abstract:**

This study investigates the structural properties of super-heavy nuclei with

*Z*= 130 by adopting the relativistic mean-field (RMF) theory within an axially deformed oscillator basis with the NL3 force parameter set. We study the binding energies, quadrupole deformation, nuclear radii, neutron separation energies, and other bulk properties. Moreover, we analyze the favorable decay modes for clear cognitive content of nuclei, such as alpha decay, using different formulae including the Viola-Seaberg, analytical formula of Royer, universal curve formula, and universal decay law. We compare these with the corresponding fission process. The spontaneous fission of super-heavy nuclei is studied with

*Z*= 130. With this appraisal, we investigate the possible shell/sub-shell closure for super-heavy nuclei adjacent by decay chains of alpha and other radioactive decay particles.

2019, 43(10): 105101. doi: 10.1088/1674-1137/43/10/105101

**Abstract:**

It is widely believed that the screening mechanism is an essential feature for the modified gravity theory. Although this mechanism has been examined thoroughly in the past decade, their analyses are based on a conventional fluid prescription for the matter-sector configuration. In this paper, we demonstrate a new formulation of the chameleon mechanism in

*F*(

*R*) gravity theory, to shed light on quantum-field theoretical effects on the chameleon mechanism as well as the related scalaron physics, induced by the matter sector. We show a possibility that the chameleon mechanism is absent in the early Universe based on a scale-invariant-extended scenario beyond the standard model of particle physics, in which a realistic electroweak phase transition, yielding the right amount of baryon asymmetry of Universe today, simultaneously breaks the scale invariance in the early Universe. We also briefly discuss the oscillation of the scalaron field and indirect generation of non-tensorial gravitational waves induced by the electroweak phase transition.

2019, 43(10): 105102. doi: 10.1088/1674-1137/43/10/105102

**Abstract:**

Neutrinos produced from

*N*for the power-law distribution of electrons in the hot fireball model. Electron density in the magnetic jet model is sufficiently lower than in the hot fireball model. The matter effect on neutrinos can be used to distinguish these two models. The coherent effect of strongly lensed PeV neutrinos is also discussed. The average survival probability of strongly-lensed electron neutrinos in the normal and inverted hierarchical cases are presented. The results show that this coherent effect can be used to determine the hierarchical mass of neutrinos.

2019, 43(10): 105103. doi: 10.1088/1674-1137/43/10/105103

**Abstract:**

Based on the cosmological principle and quantum Yang-Mills gravity in the super-macroscopic limit, we obtain an exact recession velocity and cosmic redshift z, as measured in an inertial frame

2019, 43(10): 105104. doi: 10.1088/1674-1137/43/10/105104

**Abstract:**

As a charged fermion drops into a BTZ black hole, the laws of thermodynamics and the weak cosmic censorship conjecture are investigated in both the normal and extended phase space, where the cosmological parameter and renormalization length are regarded as extensive quantities. In the normal phase space, the first and second law of thermodynamics, and the weak cosmic censorship are found to be valid. In the extended phase space, although the first law and weak cosmic censorship conjecture remain valid, the second law is dependent on the variation of the renormalization energy d

*K*. Moreover, in the extended phase space, the configurations of extremal and near-extremal black holes are not changed, as they are stable, while in the normal phase space, the extremal and near-extremal black holes evolve into non-extremal black holes.

**ISSN** 1674-1137 **CN** 11-5641/O4

Original research articles, Ietters and reviews Covering theory and experiments in the fieids of

- Particle physics
- Nuclear physics
- Particle and nuclear astrophysics
- Cosmology

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