Xue-qian Li

activity

19962019

most citedDesign and Construction of the BESIII Detector

1.2k citations · 2.7k across the 40 of their papers we have counts for

collaborators

Showing hep-phShow all

26 papers · 1 filter

hep-ph2011★ 8 cited

Geometrical Model for Non-Zero theta_13

Jun-Mou Chen, Bin Wang, Xue-Qian Li

Based on Friedberg and Lee's geometric picture by which the tribimaximal Pontecorvo-Maki-Nakawaga-Sakata leptonic mixing matrix is constructed, namely, corresponding mixing angles…

hep-ph2009★ 94 cited

The Simplest Dark-Matter Model, CDMS II Results, and Higgs Detection at LHC

Xiao-Gang He, Tong Li, Xue-Qian Li +2

The direct-search experiment for dark matter performed by the CDMS II Collaboration has observed two candidate events. Although these events cannot be interpreted as significant ev…

hep-ph2008

What do we learn from the $ρ - π$ puzzle

Xue-Qian Li

The experimental observation indicates that the branching ratio of $ψ^{'} \to ρ π$ is very small while the $ρ - π$ channel is a main one in $J / ψ$ decays. To understand the puzzle, various…

hep-ph2008★ 156 cited

Constraints on Scalar Dark Matter from Direct Experimental Searches

Xiao-Gang He, Tong Li, Xue-Qian Li +2

The standard model (SM) plus a real gauge-singlet scalar field dubbed darkon (SM+D) is the simplest model possessing a weakly interacting massive particle (WIMP) dark-matter candid…

hep-ph2007★ 16 cited

Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations

Shao-Long Chen, Xiao-Gang He, Xue-Qian Li +2

We study unparticle effects on particle and antiparticle osillations in meson-antimeson, and muonium-antimuonium systems. Unlike usual tree level contributions to meson oscillation…

hep-ph2006★ 1 cited

Annihilation Contributions and CP Asymmetries in $B^{+} \to π^{+} K^{0}, K^{+} K^{0}$ and $B^{0} \to K^{0} K ˉ^{0}$

Xi-Qing Hao, Xiao-Gang He, Xue-Qian Li

Recently the branching ratios for $B^{+} \to K^{+} K ˉ^{0}$ and $B^{0} \to K^{0} K ˉ^{0}$ have been measured. Data indicate that the annihilation amplitudes in these decays are not zero. A…

hep-ph2006★ 16 cited

Calculation of BR( $B ˉ^{0} \to Λ_{c}^{+} + p ˉ)$ in the PQCD Approach

Xiao-Gang He, Tong Li, Xue-Qian Li +1

We calculate the branching ratio of $B ˉ^{0} \to Λ_{c}^{+} p ˉ$ in the PQCD approach. Most previous model calculations obtained branching ratios significantly larger than experim…

hep-ph2006★ 54 cited

PQCD Calculation for $Λ_{b} \to Λ γ$ in the Standard Model

Xiao-Gang He, Tong Li, Xue-Qian Li +1

We calculate the branching ratio of $Λ_{b} \to Λ γ$ in the standard model using the PQCD method. The predicted branching ratio $B (Λ_{b} \to Λ γ)$ is about $(4.3 \sim 8.6) \times 1 0^{- 8}$ ,…

hep-ph2006★ 8 cited

Probe Noncommutative Space-Time Scale Using $γ γ \to Z$ At ILC

Xiao-Gang He, Xue-Qian Li

In the standard model production of on-shell Z boson at a photon collider (or Z decays into $γ γ$ ) is strictly forbidden by angular momentum conservation and Bose statistics (the Ya…

hep-ph2005★ 6 cited

Density dependence of quark masses and stability of color-flavor locked phases

Xiao-Bing Zhang, Xue-Qian Li

Considering the density dependence of quark masses, we investigate the color-flavor-locked matter and its stability relative to the ( unpaired ) strange quark matter. We find that,…

hep-ph2005★ 29 cited

Some properties of the newly observed X(1835) state at BES

Xiao-Gang He, Xue-Qian Li, Xiang Liu +1

Recently the BES collaboration has announced observation of a resonant state in the $π^{+} π^{-} η^{'}$ spectrum in $J / ψ \to γ π^{+} π^{-} η^{'}$ decay. Fitting the data with a $0^{-+}$ state, the ma…

hep-ph2005

Effects of density-dependent quark mass on phase diagram of three-flavor quark matter

Xiao-Bing Zhang, Xue-Qian Li

Considering the density dependence of quark mass, we investigate the phase transition between the (unpaired) strange quark matter and the color-flavor-locked matter, which are supp…

hep-ph2005

Bi-Large Neutrino Mixing See-Saw Mass Matrix with Texture Zeros and Leptogenesis

Wei Chao, Xiao-Gang He, Xue-Qian Li

We study constraints on neutrino properties from texture zeros in bi-large mixing See-Saw mass matrix and also from leptogenesis. Texture zeros may occur in the light (class a)) or…

hep-ph2005

The $K^{0}$ condensed phase of color-flavor locked quark matter : its formation as a stable state reexamined

Xiao-Bing Zhang, Xue-Qian Li

Taking the vector kaon-quark interaction into account, we reexamine in detail the neutral kaon condensation in color-flavor locked quark matter. It is found that the pairing phenom…

hep-ph2004★ 18 cited

Berry Phase in Neutrino Oscillations

Xiao-Gang He, Xue-Qian Li, Bruce H. J. McKellar +1

We study the Berry phase in neutrino oscillations for both Dirac and Majorana neutrinos. In order to have a Berry phase, the neutrino oscillations must occur in a varying medium, t…

hep-ph2004★ 6 cited

Photoproduction and Radiative Decay of Spin 1/2 and 3/2 Pentaquarks

Xiao-Gang He, Tong Li, Xue-Qian Li +1

We study photoproduction and radiative decays of pentauqarks paying particular attention to the differences between spin-1/2 and spin-3/2, positive and negative parities of pentaqu…

hep-ph2004★ 19 cited

Parity, Charge Conjugation and SU(3) Constraints on Threshold Enhancement in $J / ψ$ decays into $γ p p ˉ$ and $K p Λ ˉ$

Xiao-Gang He, Xue-Qian Li, J. P. Ma

We study the threshold enhancement effects of baryon-anti-baryon systems in $J / ψ$ decays at BES using parity $P$ , charge conjugation $C$ , and flavor SU(3) symmetries. The $P$ and $…

hep-ph2004★ 8 cited

Hadronic Decays Involving Heavy Pentaquarks

Xiao-Gang He, Xue-Qian Li

Recently several experiments have reported evidences for pentaquark $Θ^{+}$ . H1 experiment at HERA-B has also reported evidence for $Θ_{c}$ . $Θ^{+}$ is interpreted as a bound state of an…

hep-ph2004★ 3 cited

Does The $△ I = 1/2$ Rule Hold In D And B $\to π π$ Decays?

Peng Guo, Xiao-Gang He, Xue-Qian Li

Although two pion decays of $K$ , $D$ and $B$ have similar isospin structures, there are dramatic differences in the ratios $R_{K}$ and $R_{D, B}$ of amplitudes from $Δ I = 3/2$ and $ΔI…

hep-ph2002

Strange sea asymmetry in nucleons

Xue-Qian Li, Xiao-Bing Zhang, Bo-Qiang Ma

We evaluate the medium effects in nucleon which can induce an asymmetry of the strange sea. The short-distance effects determined by the weak interaction can give rise to $δm\equiv…

hep-ph2001★ 6 cited

Asymmetry of Strange Sea in Nucleons

Xue-Qian Li, Xiao-Bing Zhang, Bo-Qiang Ma

Based on the finite-temperature field theory, we evaluate the medium effects in nucleon which can induce an asymmetry between quarks and antiquarks of the strange sea. The short-di…

hep-ph2000★ 3 cited

Bose Symmetry Interference Effects of $4 π$ Final States

Jie Chen, Xue-Qian Li, Bing-Song Zou

We carefully analyze the relative branching ratios of $4 π$ final states $π^{+} π^{-} π^{+} π^{-}$ , $π^{+} π^{-} π^{0} π^{0}$ and $π^{0} π^{0} π^{0} π^{0}$ , from various resonances of $J^{P C} = 0^{++}$ , $0^{-+}$ , $2^…

hep-ph1998

A Possible Hidden Symmetry and Geometrical Source of the Phase in the CKM Matrix

Jing-Ling Chen, Mo-Lin Ge, Xue-Qian Li +1

Based on the present data, the three CKM angles may construct a spherical surface triangle whose area automatically provides a "holonomy" phase. By assuming this geometrical phase…

hep-ph1998★ 18 cited

Inelastic Final-State Interactions of $B \to V V \to π K$ Processes

Dong-Sheng Du, Xue-Qian Li, Zheng-Tao Wei +1

We study the final-state interactions in $B \to π K$ decays through $B \to V V \to π K$ processes where the inelastic rescattering occurs via single pion exchange. The next-to-leading…

Geometrical Model for Non-Zero theta_13

The Simplest Dark-Matter Model, CDMS II Results, and Higgs Detection at LHC

What do we learn from the ρ−π puzzle

Constraints on Scalar Dark Matter from Direct Experimental Searches

Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations

Annihilation Contributions and CP Asymmetries in B+→π+K0,K+K0 and B0→K0Kˉ0

Calculation of BR(Bˉ0→Λc+​+pˉ​) in the PQCD Approach

PQCD Calculation for Λb​→Λγ in the Standard Model

Probe Noncommutative Space-Time Scale Using γγ→Z At ILC

Density dependence of quark masses and stability of color-flavor locked phases

Some properties of the newly observed X(1835) state at BES

Effects of density-dependent quark mass on phase diagram of three-flavor quark matter

Bi-Large Neutrino Mixing See-Saw Mass Matrix with Texture Zeros and Leptogenesis

The K0 condensed phase of color-flavor locked quark matter : its formation as a stable state reexamined

Berry Phase in Neutrino Oscillations

Photoproduction and Radiative Decay of Spin 1/2 and 3/2 Pentaquarks

Parity, Charge Conjugation and SU(3) Constraints on Threshold Enhancement in J/ψ decays into γppˉ​ and KpΛˉ

Hadronic Decays Involving Heavy Pentaquarks

Does The △I=1/2 Rule Hold In D And B →ππ Decays?

Strange sea asymmetry in nucleons

Asymmetry of Strange Sea in Nucleons

Bose Symmetry Interference Effects of 4π Final States

A Possible Hidden Symmetry and Geometrical Source of the Phase in the CKM Matrix

Inelastic Final-State Interactions of B→VV→πK Processes

What do we learn from the $ρ - π$ puzzle

Annihilation Contributions and CP Asymmetries in $B^{+} \to π^{+} K^{0}, K^{+} K^{0}$ and $B^{0} \to K^{0} K ˉ^{0}$

Calculation of BR( $B ˉ^{0} \to Λ_{c}^{+} + p ˉ)$ in the PQCD Approach

PQCD Calculation for $Λ_{b} \to Λ γ$ in the Standard Model

Probe Noncommutative Space-Time Scale Using $γ γ \to Z$ At ILC

The $K^{0}$ condensed phase of color-flavor locked quark matter : its formation as a stable state reexamined

Parity, Charge Conjugation and SU(3) Constraints on Threshold Enhancement in $J / ψ$ decays into $γ p p ˉ$ and $K p Λ ˉ$

Does The $△ I = 1/2$ Rule Hold In D And B $\to π π$ Decays?

Bose Symmetry Interference Effects of $4 π$ Final States

Inelastic Final-State Interactions of $B \to V V \to π K$ Processes