101 results on '"Xiao, Hai"'
Search Results
2. Searching for observable effects induced by anomalous triangle singularities
- Author
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Xiao-Hai Liu, Makoto Oka, and Qiang Zhao
- Subjects
Physics ,QC1-999 - Abstract
We investigate the anomalous triangle singularity (ATS) and its possible manifestations in various processes. We show that the ATS should have important impact on our understanding of the nature of some newly observed threshold states. Discussions on how to distinguish the ATS phenomena from genuine dynamic pole structures are presented.
- Published
- 2016
- Full Text
- View/download PDF
3. Nighttime dehazing algorithm of dark channel and bright channel fusion optimization
- Author
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Xiao-qiang Wu, Wei Shi, Xiao-hai He, Peng-fei Li, and Lin-bo Qing
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Physics ,Fusion ,Signal Processing ,Instrumentation ,Algorithm ,Electronic, Optical and Magnetic Materials ,Communication channel - Published
- 2021
4. The Correlations between Radio and γ-ray Emissions in Multibands for Fermi Blazars
- Author
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Nie Jian-jun, Chen Xiu-hui, Deng Jin-jie, Tuo Man-xian, Wang Sheng-hui, Yang Jiang-he, QU Xiao-hai, Fan Jun-hui, and Zhang Yue-lian
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Physics ,Correlation coefficient ,010308 nuclear & particles physics ,Flux ,Astronomy and Astrophysics ,Quasar ,Astrophysics ,Radiation ,01 natural sciences ,Synchrotron ,law.invention ,Methods statistical ,Space and Planetary Science ,law ,0103 physical sciences ,Blazar ,010303 astronomy & astrophysics ,Fermi Gamma-ray Space Telescope - Abstract
A sample including 935 blazars with 415 Flat Spectrum Radio Quasars (FSRQs) and 520 BL Lac objects (BL Lacs) (233 HBLs (High synchrotron peak frequency BL Lacs), 144 IBLs (Intermediate synchrotron peak frequency BL Lacs), and 143 LBLs (Low synchrotron peak frequency BL Lacs)) is selected in Fermi 3FGL catalogue. The correlations between two flux densities of the radio 1.4 GHz and γ -ray at 0.1, 0.3, 1, 3, and 10 GeV are investigated for the samples of all blazars, FSRQs, BL Lacs, and subclasses of HBLs and LBLs, respectively. Results show that there are strong positive correlations between the two flux densities, with the correlation coefficients r = 0.48 ∼ 0.81 , and the chance probabilities p all less than 10 − 4 . The correlation coefficient has different trends with the change of γ -ray emission frequency for different blazar samples, and the average correlation coefficients for all the samples at five respective bands decrease with the increase of γ -ray frequency. Therefore, with the increase of γ -ray frequency, the dominant mechanism of γ -ray radiation of blazar is changing, and at the same frequency the dominant mechanism is different for different samples. The γ -ray emission of HBLs may be mainly dominated by the synchrotron self-Compton, while the other mechanisms are responsible for the γ -ray emissions of LBLs. The origin of γ -ray in FSRQs is more complex than that of BL Lacs.
- Published
- 2020
5. The Relations of Multi-waveband Effective Spectral Indices for Fermi Blazars
- Author
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Wang Sheng-hui, Nie Jian-jun, Yang Jiang-he, Zhang Yue-lian, Tuo Man-xian, Fan Jun-hui, Chen Yi, and QU Xiao-hai
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Physics ,Spectral index ,010308 nuclear & particles physics ,Flux ,Astronomy and Astrophysics ,Quasar ,Astrophysics ,01 natural sciences ,Synchrotron ,law.invention ,Space and Planetary Science ,law ,0103 physical sciences ,Blazar ,010303 astronomy & astrophysics ,Fermi Gamma-ray Space Telescope - Abstract
In this paper, the flux densities at the radio (R) 1.4 GHz, optical (O) 4.68 × 10 14 Hz, X-ray (X) 1 keV, and γ -ray ( γ ) 1 GeV are obtained from the available literature for a Fermi blazar sample. The 6 effective spectral indices ( α RO , α RX , α R γ , α OX , α O γ , and α X γ ) between any two of above bands are calculated. The correlations between any two spectral indices are investigated for the whole blazar sample and the subclass samples of FSRQs (Flat Spectral Radio Quasars) and BL Lacs including High synchrotron peak frequency BL Lacs (HBLs) and Low synchrotron peak frequency BL Lacs (LBLs). Results show that: (1) There are close correlations between any two spectral indices for all samples, except for the sample of HBLs and the correlation between α OX and α R γ . This kind of correlations can be explained by the structures of energy spectral distributions at four bands. (2) In the scatter plots of effective spectral index correlations, FSRQs and LBLs are distributed in the same area, but HBLs and FSRQs (LBLs) are distributed in the different areas. (3) The separation degree (discrimination) between the distributions of FSRQs (LBLs) and HBLs differs with the scatter plot of effective spectral index correlations, and the discrimination is related to the frequencies to determine two effective spectral indices.
- Published
- 2020
6. Hidden charm hadronic molecule with strangeness Pcs*(4739) as a ΣcD¯K¯ bound state
- Author
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Tian-Wei Wu, Li-Sheng Geng, Xiao-Hai Liu, Ya-Wen Pan, Ming-Zhu Liu, and Jun-Xu Lu
- Subjects
Physics ,Particle physics ,Hadron ,Bound state ,Molecule ,Charm (quantum number) ,Strangeness - Published
- 2021
7. Threshold effects as the origin of $$Z_{cs}(4000)$$, $$Z_{cs}(4220)$$ and X(4700) observed in $$B^+\rightarrow J/\psi \phi K^+$$
- Author
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Xiao-Hai Liu, Ying-Hui Ge, and Hong-Wei Ke
- Subjects
Physics ,High Energy Physics - Phenomenology ,Particle physics ,Physics and Astronomy (miscellaneous) ,Resonance ,High Energy Physics::Experiment ,Engineering (miscellaneous) ,Prime (order theory) ,High Energy Physics - Experiment - Abstract
We investigate the $B^+\to J/\psi \phi K^+$ decay via various rescattering diagrams. Without introducing genuine exotic resonances, it is shown that the $Z_{cs}(4000)$, $Z_{cs}(4220)$ and $X(4700)$ reported by the LHCb collaboration can be simulated by the $J/\psi K^{*+}$, $\psi^\prime K^+$ and $\psi^\prime \phi$ threshold cusps, respectively. These cusps are enhanced by some nearby triangle singularities. The $X(4685)$ with $J^P=1^+$ cannot be well simulated by the threshold effects in our model, which implies that it may be a genuine resonance., Comment: 7 pages, 6 figures, 2 tables
- Published
- 2021
8. Tetraquark state $X(6900)$ and the interaction between diquark and antidiquark
- Author
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Yan-Liang Shi, Hong-Wei Ke, Xin Han, and Xiao-Hai Liu
- Subjects
Physics ,Physics and Astronomy (miscellaneous) ,Meson ,Bar (music) ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,QC770-798 ,State (functional analysis) ,Astrophysics ,Quantum number ,Coupling (probability) ,High Energy Physics - Experiment ,QB460-466 ,Diquark ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,Nuclear and particle physics. Atomic energy. Radioactivity ,Bound state ,Tetraquark ,High Energy Physics::Experiment ,Engineering (miscellaneous) ,Mathematical physics - Abstract
Recently LHCb declared a new structure $X(6900)$ in the final state di-$J/\psi$ which is popularly regarded as a $cc$-$\bar c\bar c$ tetraquark state. %popularly. Within the Bethe-Salpeter (B-S) frame we study the possible $cc$-$\bar c\bar c$ bound states and the interaction between diquark ($cc$) and antidiquark ($\bar c\bar c$). In this work $cc$ ($\bar c\bar c$) is treated as a color anti-triplet (triplet) axial-vector so the quantum numbers of $cc$-$\bar c\bar c$ bound state are $0^+$, $1^+$ and $2^+$. Learning from the interaction in meson case and using the effective coupling we suggest the interaction kernel for diquark and antidiquark system. Then we deduce the B-S equations for different quantum numbers. Solving these equations numerically we find the spectra of some excited states can be close to the mass of $X(6900)$ when we assign appropriate values for parameter $\kappa$ introduced in the interaction (kernel).We also briefly calculate the spectra of $bb$-$\bar b\bar b$ bound states. Future measurement of $bb$-$\bar b\bar b$ state will help us to determine the exact form of effective interaction., Comment: 14 pages, two figures
- Published
- 2021
- Full Text
- View/download PDF
9. Triangle singularity as the origin of $$X_0(2900)$$ and $$X_1(2900)$$ observed in $$B^+\rightarrow D^+ D^- K^+$$
- Author
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Mao-Jun Yan, Hong-Wei Ke, Ju-Jun Xie, Gang Li, and Xiao-Hai Liu
- Subjects
Physics ,Nuclear Theory ,Physics and Astronomy (miscellaneous) ,Meson ,Hadron ,FOS: Physical sciences ,Elementary particle ,Quantum number ,High Energy Physics - Experiment ,Nuclear Theory (nucl-th) ,Scattering amplitude ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology ,Particle decay ,High Energy Physics - Phenomenology (hep-ph) ,High Energy Physics::Experiment ,B meson ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,Engineering (miscellaneous) ,Mathematical physics ,Boson - Abstract
The LHCb collaboration reported the observation of a narrow peak in the $D^- K^+$ invariant mass distributions from the $B^+\to D^+ D^- K^+$ decay. The peak is parameterized in terms of two resonances $X_0(2900)$ and $X_1(2900)$ with the quark contents $\bar{c}\bar{s}ud$, and their spin-parity quantum numbers are $0^+$ and $1^-$, respectively. We investigate the rescattering processes which may contribute to the $B^+\to D^+ D^- K^+$ decays. It is shown that the $D^{*-}K^{*+}$ rescattering via the $\chi_{c1}K^{*+}D^{*-}$ loop or the $\bar{D}_{1}^{0}K^{0}$ rescattering via the $D_{sJ}^{+}\bar{D}_{1}^{0}K^{0}$ loop simulate the $X_0(2900)$ and $X_1(2900)$ structures. Such phenomena are due to the analytical property of the scattering amplitudes with the triangle singularities located to the vicinity of the physical boundary., Comment: 6 pages, 3 figures
- Published
- 2020
10. Ultrasensitive chemical sensors based on whispering gallery modes in a microsphere coated with zeolite
- Author
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Lin, Nai, Jiang, Lan, Wang, Sumei, Yuan, Lei, Xiao, Hai, Lu, Yongfeng, and Tsai, Hailung
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Zeolites -- Usage ,Chemical detectors -- Design and construction ,Chemical detectors -- Research ,Astronomy ,Physics - Abstract
We propose a highly sensitive chemical sensor by functionally coating a zeolite film on the external surface of an optical microsphere. Using the perturbation theory, a model is developed to calculate sensor sensitivity and analyze the impact of the zeolite film thickness. The quality factor and detection limit are also investigated by using an approximate model. Simulations show that a zeolite coating can effectively increase sensitivity. The results provide physical insights for the design and optimization of various parameters for desired sensor performance. OCIS codes: 140.3948, 280.4788, 140.4780, 230.5750.
- Published
- 2010
11. Measurement of C[O.sub.2]-laser-irradiation-induced refractive index modulation in single-mode fiber toward long-period fiber grating design and fabrication
- Author
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Li, Yanjun, Wei, Tao, Montoya, John A., Saini, Sandeep V., Lan, Xinwei, Tang, Xiling, Dong, Junhang, and Xiao, Hai
- Subjects
Carbon dioxide -- Properties ,Laser beams -- Properties ,Laser beams -- Influence ,Refractive index -- Research ,Fiber optics -- Research ,Diffraction gratings -- Properties ,Integrated circuit fabrication -- Methods ,Fiber optics ,Integrated circuit fabrication ,Astronomy ,Physics - Abstract
We report a new method to measure the C[O.sub.2]-laser-irradiation-induced refractive index modulation in the core of a single-mode optical fiber for the purpose of design and fabrication of long-period fiber gratings (LPFGs) without applying tension. Using an optical fiber Fabry--Perot interferometer, the laser-induced axial refractive index perturbation was measured. We found that the C[O.sub.2]-laser-irradiation-induced refractive index change in the fiber core had a negative value and that the magnitude was a sensitive function of the laser exposure time following almost a linear relation. Under the assumption of a Gaussian-shaped refractive index modulation profile and based on the first two terms of Fourier series approximation, the measured refractive index perturbations were used to simulate the LPFG transmission spectra. LPFGs with the same laser exposure parameters were fabricated without applying tension, and their spectra were compared with those obtained by simulations. OCIS codes: 060.2310, 060.2370, 050.2770.
- Published
- 2008
12. Probing hidden-charm decay properties of <math><msub><mi>P</mi><mi>c</mi></msub></math> states in a molecular scenario
- Author
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Xiao-Hai Liu, Xiang Liu, Li-Ye Xiao, Guang-Juan Wang, Shi-Lin Zhu, and Rui Chen
- Subjects
Quark ,Physics ,Particle physics ,Meson ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,01 natural sciences ,Condensed Matter::Disordered Systems and Neural Networks ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Near threshold ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Mathematics::Probability ,0103 physical sciences ,Mass spectrum ,Condensed Matter::Statistical Mechanics ,High Energy Physics::Experiment ,Charm (quantum number) ,010306 general physics - Abstract
The $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$ observed by the LHCb Collaboration are very likely to be $S$-wave $\Sigma_c\bar{D}^{(*)}$ molecular candidates due to their near-threshold character. In this work, we study the hidden-charm decay modes of these $P_c$ states, $P_c\to J/\psi p(\eta_cp)$, using a quark interchange model. The decay mechanism for the $P_c\to J/\psi p(\eta_cp)$ processes arises from the quark-quark interactions, where all parameters are determined by the mass spectra of mesons. We present our results in two scenarios. In scenario I, we perform the dynamical calculations and treat the $P_c$ states as pure $\Sigma_c \bar D^{(*)}$ molecules. In scenario II, after considering the coupled channel effect between different flavor configurations $\Sigma^{(*)}_c\bar D^{(*)}$, we calculate these partial decay widths again. The decay patterns in these two scenarios can help us to explore the molecular assignment and the inner flavor configurations for the $P_c$ states. In particular, the decay widths of $\Gamma(P_c(4312)\to\eta_cp)$ are comparable to the $J/\psi p$ decay widths in both of these two scenarios. Future experiments like LHCb may confirm the existence of the $P_c(4312)$ in the $\eta_cp$ channel., Comment: 13 pages, 7 figures, version published in PRD
- Published
- 2020
13. Identification of a visible narrow cusp structure in Λc+→pK−π+
- Author
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Ju-Jun Xie, Qiang Zhao, Xiao-Hai Liu, and Gang Li
- Subjects
Cusp (singularity) ,Nuclear physics ,Physics ,Singularity ,Structure (category theory) ,Invariant mass ,Bin - Abstract
A resonance-like structure as narrow as 10 MeV is observed in the K−p invariant mass distributions in Λc+→pK−π+. This precise measurement is based on a data sample of about 1.5 million events, and the bin width of K−p invariant mass is only 1 MeV. The narrow peak precisely lies on the Λη threshold, because of which it is natural to identify it as a threshold cusp. Being different from the common two-body unitary cusp, we find that the narrowness of this cusp can be induced by a nearby triangle singularity of the Λa0(980) or ηΣ(1660) rescattering process.
- Published
- 2020
14. Study on $$\Xi _{cc}\rightarrow \Xi _c$$ and $$\Xi _{cc}\rightarrow \Xi '_c$$ weak decays in the light-front quark model
- Author
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Hong-Wei Ke, Xiao-Hai Liu, Xue-Qian Li, and Fang Lu
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Diquark ,Physics ,Particle physics ,Conjecture ,Physics and Astronomy (miscellaneous) ,Quark model ,State (functional analysis) ,Engineering (miscellaneous) ,Charm quark ,Spin-½ - Abstract
In this work we study the weak decays of $$\Xi _{cc}\rightarrow \Xi _c$$Ξcc→Ξc and $$\Xi _{cc}\rightarrow \Xi '_c$$Ξcc→Ξc′ in the light-front quark model. Generally, a naive, but reasonable conjecture suggests that the cc subsystem in $$\Xi _{cc}$$Ξcc ( us pair in $$\Xi ^{(')}_c$$Ξc(′)) stands as a diquark with definite spin and color assignments. During the concerned processes, the diquark of the initial state is not a spectator, namely must be broken. A Racah transformation would decompose the original (cc)q into a combination of c(cq) components. Thus we may deal with the decaying c quark alone while keeping the (cq) subsystem as a spectator. With the re-arrangement of the inner structure we calculate the form factors numerically and then obtain the rates of semi-leptonic decays and non-leptonic decays, which will be measured in the future.
- Published
- 2020
15. Study on possible molecular states composed of ΛcD¯ ( ΛbB ) and ΣcD¯ ( ΣbB ) within the Bethe-Salpeter framework
- Author
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Xiao-Hai Liu, Mei Li, Hong-Wei Ke, and Xue-Qian Li
- Subjects
Physics ,Particle physics ,Bethe–Salpeter equation ,010308 nuclear & particles physics ,Sigma ,State (functional analysis) ,01 natural sciences ,Pentaquark ,Isospin ,0103 physical sciences ,Bound state ,Production (computer science) ,010306 general physics ,Bar (unit) - Abstract
$P_c(4312)$ observed by the LHCb collaboration is confirmed as a pentaquark and its structure, production, and decay behaviors attract great attention from theorists and experimentalists. Since its mass is very close to sum of $\Sigma_c$ and $\bar D$ masses, it is naturally tempted to be considered as a molecular state composed of $\Sigma_c$ and $\bar D$. Moreover, $P_c(4312)$ is observed in the channel with $J/\psi p$ final state, requiring that isospin conservation $P_c(4312)$ is an isospin-1/2 eigenstate. In literature, several groups used various models to estimate its spectrum. We systematically study the pentaquarks within the framework of the Bethe-Salpeter equation; thus $P_c(4312)$ is an excellent target because of the available data. We calculate the spectrum of $P_c(4312)$ in terms of the Bethe-Salpter equations and further study its decay modes. Some predictions on other possible pentaquark states that can be tested in future experiments are made.
- Published
- 2020
16. Establishing the first hidden-charm pentaquark with strangeness
- Author
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H. S. Chen, Xiao-Hai Liu, Wei Chen, and Xiang Liu
- Subjects
Physics ,QCD sum rules ,Particle physics ,Physics and Astronomy (miscellaneous) ,Hadron ,FOS: Physical sciences ,QC770-798 ,State (functional analysis) ,Strangeness ,Astrophysics ,Pentaquark ,High Energy Physics - Experiment ,Interpretation (model theory) ,QB460-466 ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,Nuclear and particle physics. Atomic energy. Radioactivity ,Charm (quantum number) ,Engineering (miscellaneous) - Abstract
We study the $P_{cs}(4459)^0$ recently observed by LHCb using the method of QCD sum rules. Our results support its interpretation as the $\bar D^* \Xi_c$ hadronic molecular state of either $J^P=1/2^-$ or $3/2^-$. Within the hadronic molecular picture, the three LHCb experiments observing $P_c$ and $P_{cs}$ states \cite{lhcb,Aaij:2015tga,Aaij:2019vzc} can be well understood as a whole. This strongly supports the existence of hadronic molecules, whose studies can significantly improve our understanding on the construction of the subatomic world. To verify this picture, we propose to further investigate the $P_{cs}(4459)^0$ to examine whether it can be separated into two states, and to search for the $\bar D \Xi_c$ molecular state of $J^P=1/2^-$., Comment: 8 pages, 3 figure, 1 table, revised version to be published in EPJC
- Published
- 2020
- Full Text
- View/download PDF
17. Weak decays of in the light-front quark model *
- Author
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Hong-Wei Ke, Qing-Qing Kang, Xue-Qian Li, and Xiao-Hai Liu
- Subjects
Physics ,Charmed baryons ,Combinatorics ,Nuclear and High Energy Physics ,Quark model ,Astronomy and Astrophysics ,Model parameters ,State (functional analysis) ,Instrumentation ,Vertex (geometry) - Abstract
Without contamination from the final state interactions, the calculation of the branching ratios of semileptonic decays \begin{document}$ \Xi^{(')}_{c}\to\Xi+e^+\nu_e $\end{document} may provide further information about the inner structure of charmed baryons. Moreover, by studying such processes, one can better determine the form factors of \begin{document}$ \Xi_c\to\Xi $\end{document} that can be further applied to relevant estimates. In this study, we used the light-front quark model to carry out computations where the three-body vertex functions for \begin{document}$ \Xi_c $\end{document} and \begin{document}$ \Xi $\end{document} are employed. To fit the new data of the Belle II, we re-adjusted the model parameters to obtain \begin{document}$ \beta_{s[sq]} = 1.07 $\end{document} GeV, which is 2.9 times larger than \begin{document}$ \beta_{s\bar s} = 0.366 $\end{document} GeV. This value may imply that the \begin{document}$ ss $\end{document} pair in \begin{document}$ \Xi $\end{document} constitutes a more compact subsystem. Furthermore, we investigated the non-leptonic decays of \begin{document}$ \Xi^{(')}_c\to \Xi $\end{document} , which will be experimentally measured soon. Thus, our model will be tested in terms of consistency with the new data.
- Published
- 2021
18. Fiber Fabry-Perot sensors for detection of partial discharges in power transformers
- Author
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Yu, Bing, Kim, Dae Woong, Deng, Jiangdong, Xiao, Hai, and Wang, Anbo
- Subjects
Sound-waves -- Measurement ,Astronomy ,Physics - Abstract
A diaphragm-based interferometric fiber optic sensor that uses a low-coherence light source was designed and tested for on-line detection of the acoustic waves generated by partial discharges inside high-voltage power transformers. The sensor uses a fused-silica diaphragm and a single-mode optical fiber encapsulated in a fused-silica glass tube to form an extrinsic Fabry--Perot interferometer, which is interrogated by low-coherence light. Test results indicate that these fiber optic acoustic sensors are capable of faithfully detecting acoustic signals propagating inside transformer oil with high sensitivity and wide bandwidth. OCIS codes: 060.2370, 120.2230, 120.1880.
- Published
- 2003
19. Visible narrow cusp structure in Λc+→pK−π+ enhanced by triangle singularity
- Author
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Gang Li, Ju-Jun Xie, Qiang Zhao, and Xiao-Hai Liu
- Subjects
Cusp (singularity) ,Physics ,010308 nuclear & particles physics ,Quark model ,State (functional analysis) ,Lambda ,01 natural sciences ,Scattering amplitude ,Singularity ,0103 physical sciences ,Mass spectrum ,Invariant mass ,Atomic physics ,010306 general physics - Abstract
A resonance-like structure as narrow as 10 MeV is observed in the ${K}^{\ensuremath{-}}p$ invariant mass distributions in ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}\ensuremath{\rightarrow}p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ at Belle. Based on the large data sample of about 1.5 million events and the small bin width of just 1 MeV for the ${K}^{\ensuremath{-}}p$ invariant mass spectrum, the narrow peak is found precisely lying at the $\mathrm{\ensuremath{\Lambda}}\ensuremath{\eta}$ threshold. While lacking evidence for a quark model state with such a narrow width at this mass region, we find that this narrow structure can be naturally identified as a threshold cusp but enhanced by the nearby triangle singularity via the $\mathrm{\ensuremath{\Lambda}}\text{\ensuremath{-}}{a}_{0}(980{)}^{+}$ or $\ensuremath{\eta}\text{\ensuremath{-}}\mathrm{\ensuremath{\Sigma}}(1660{)}^{+}$ rescatterings.
- Published
- 2019
20. Radiative decays of f1(1285) as the K*K̅ molecular state *
- Author
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Ju-Jun Xie, Gang Li, and Xiao-Hai Liu
- Subjects
Nuclear physics ,Physics ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,Nuclear and High Energy Physics ,High Energy Physics - Phenomenology (hep-ph) ,Radiative transfer ,FOS: Physical sciences ,High Energy Physics::Experiment ,Astronomy and Astrophysics ,State (functional analysis) ,Instrumentation ,High Energy Physics - Experiment - Abstract
Within a picture of the $f_1(1285)$ being a dynamically generated resonance from the $ K^*\bar K$ interactions, we estimate the rates for the radiative transitions of the $f_1(1285)$ meson to the vector mesons $\rho^0$,$\omega$ and $\phi$. These radiative decays proceed via the kaon loop diagrams. The calculated results are in fair agreement with the experimental measurements. Some predictions can be tested by experiments and their implementation and comparison with these predictions will be valuable to decode the nature of the $f_1(1285)$ state., Comment: 5 pages, 3 figures
- Published
- 2020
21. Understanding the newly observed heavy pentaquark candidates
- Author
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Qiang Zhao, Qian Wang, and Xiao-Hai Liu
- Subjects
Cusp (singularity) ,Physics ,Nuclear and High Energy Physics ,Nuclear Theory ,010308 nuclear & particles physics ,Diagram ,FOS: Physical sciences ,01 natural sciences ,Pentaquark ,High Energy Physics - Experiment ,Nuclear Theory (nucl-th) ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Singularity ,0103 physical sciences ,Order (group theory) ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,Nuclear theory - Abstract
We find that several thresholds can contribute to the enhancements of the newly observed heavy pentaquark candidates $P_c^+(4380)$ and $P_c^+(4450)$ via the anomalous triangle singularity (ATS) transitions in the specific kinematics of $\Lambda_b\to J/\psi K^- p$. Apart from the observed two peaks we find that another peaks around 4.5 GeV can also be produced by the ATS. We also show that the $\Sigma_c^{(*)}$ can be produced at leading order in $\Lambda_b$ decay. This process is different from the triangle diagram and its threshold enhancement only appears as CUSP effects if there is no pole structure or the ATS involved. The threshold interaction associated with the presence of the ATS turns out to be a general phenomenon and plays a crucial role in the understanding of candidates for exotic states., Comment: 9 pages, 6 figures, 4 tables; published version in PLB
- Published
- 2016
- Full Text
- View/download PDF
22. Study on the possible molecular state composed of within the Bethe-Salpeter framework *
- Author
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Xiao-Hai Liu, Hong-Wei Ke, and Xue-Qian Li
- Subjects
Combinatorics ,Physics ,Nuclear and High Energy Physics ,Hadron ,Bound state ,Astronomy and Astrophysics ,Production (computer science) ,Tetraquark ,Vector meson ,State (functional analysis) ,Instrumentation ,Pseudovector ,Vertex (geometry) - Abstract
Recently, a vector charmonium-like state was observed in the portal of . This intrigues an active discussion on the structure of the resonance because it has obvious significance for gaining a better understanding on its hadronic structure that contains suitable inner constituents. Therefore, this observation concerns the general theoretical framework about possible structures of exotic states. Since the mass of is slightly above the production threshold of whereas it is below that of with the same quark contents as that of , it is natural to conjecture that is a molecular state of , as suggested in the literature. Confirming or negating this allegation would shed light on the goal we are concerned with. We calculate the mass spectrum of a system composed of a vector meson and an axial vector i.e., within the framework of the Bethe-Salpeter equations. Our numerical results show that the dimensionless parameter in the form factor, which is phenomenologically introduced to every vertex, is far beyond the reasonable range for inducing even a very small binding energy . It implies that the system cannot exist in the nature as a hadronic molecule in this model. Therefore, we may not be able to assume the resonance to be a bound state of and instead, it could be attributed to something else, such as a tetraquark.
- Published
- 2020
23. Threshold cusps and triangle singularities in hadronic reactions
- Author
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Xiao-Hai Liu, Feng-Kun Guo, and Shuntaro Sakai
- Subjects
Quark ,Nuclear and High Energy Physics ,Particle physics ,Nuclear Theory ,Meson ,Hadron ,FOS: Physical sciences ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear Theory (nucl-th) ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,0103 physical sciences ,Invariant mass ,Color confinement ,Nuclear Experiment ,010306 general physics ,Quantum chromodynamics ,Physics ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Exotic hadron ,High Energy Physics - Phenomenology ,High Energy Physics::Experiment ,Gravitational singularity - Abstract
The spectrum of hadrons is the manifestation of color confinement of quantum chromodynamics. Hadronic resonances correspond to poles of the S-matrix. Since 2003, lots of new hadron resonant structures were discovered in the mass regions from light mesons to hadrons containing a pair of a heavy quark and an antiquark. Many of them are candidates of exotic hadrons, and they are usually observed as peaks in invariant mass distributions. However, the S-matrix also has kinematical singularities due to the on-shellness of intermediate particles for a process, such as two-body thresholds and triangle singularities, and they can produce peaks as well. On the one hand, such singularities may be misidentified as resonances; on the other hand, they can be used as tools for precision measurements. In this paper, we review the threshold cusps and various triangle singularities in hadronic reactions, paying attention to their manifestations in phenomena related to exotic hadron candidates., Comment: Version accepted for publication in Prog. Part. Nucl. Phys.; 84 pages, 34 figures
- Published
- 2020
24. Explore the QCD phase transition phenomena from a multiphase transport model
- Author
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Zi-Wei Lin, Guo-Liang Ma, Song Zhang, Yu-Gang Ma, Jing-Han Chen, and Xiao-Hai Jin
- Subjects
Quantum chromodynamics ,Physics ,Phase transition ,High Energy Physics::Phenomenology ,Elliptic flow ,General Physics and Astronomy ,Parton ,01 natural sciences ,Baryon ,Nuclear physics ,Pion ,Phase (matter) ,0103 physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,010303 astronomy & astrophysics ,QCD matter - Abstract
We study the phase structure of QCD matter in the framework of a multiphase transport model by implementing a strong local parton density fluctuation scenario. Our calculations on the beam energy dependence of net-proton high moment show that local parton density fluctuation only has a small effect. But it becomes important when all baryons are included. We then study the effect on elliptic flow and find that an enhanced local parton density fluctuation leads to a significant effect on protons but a small effect on pions. Our study provides a reference of transport dynamics on QCD phase transition phenomena and will be relevant for the upcoming phase II of the beam energy scan program at RHIC.
- Published
- 2018
25. New spectrum of negative-parity doubly charmed baryons: Possibility of two quasistable states
- Author
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Mao-Jun Yan, Sergi Gonzàlez-Solís, Feng-Kun Guo, Xiao-Hai Liu, Bing-Song Zou, Christoph Hanhart, and Ulf-G. Meißner
- Subjects
Particle physics ,Chiral perturbation theory ,Meson ,Nuclear Theory ,High Energy Physics::Lattice ,Hadron ,FOS: Physical sciences ,Computer Science::Digital Libraries ,01 natural sciences ,Omega ,Pseudoscalar meson ,Charm quark ,High Energy Physics - Experiment ,Nuclear Theory (nucl-th) ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,High Energy Physics - Lattice ,0103 physical sciences ,ddc:530 ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,Physics ,010308 nuclear & particles physics ,High Energy Physics - Lattice (hep-lat) ,High Energy Physics::Phenomenology ,Charmed baryons ,High Energy Physics - Phenomenology ,Isospin ,High Energy Physics::Experiment - Abstract
The discovery of $\Xi_{cc}^{++}$ by the LHCb Collaboration triggers predictions of more doubly charmed baryons. By taking into account both the $P$-wave excitations between the two charm quarks and the scattering of light pseudoscalar mesons off the ground state doubly charmed baryons, a set of negative-parity spin-1/2 doubly charmed baryons are predicted already from a unitarized version of leading order chiral perturbation theory. Moreover, employing heavy antiquark-diquark symmetry the relevant low-energy constants in the next-to-leading order are connected with those describing light pseudoscalar mesons scattering off charmed mesons, which have been well determined from lattice calculations and experimental data. Our calculations result in a spectrum richer than that of heavy mesons. We find two very narrow $J^P=1/2^-$ $\Omega_{cc}^P$, which very likely decay into $\Omega_{cc}\pi^0$ breaking isospin symmetry. In the isospin-1/2 $\Xi_{cc}^P$ sector, three states are predicted to exist below 4.2~GeV with the lowest one being narrow and the other two rather broad. We suggest to search for the $\Xi_{cc}^{P}$ states in the $\Xi_{cc}^{++}\pi^-$ mode. Searching for them and their analogues are helpful to establish the hadron spectrum., Comment: 6 pages, 3 figures; accepted for publication as a Rapid Communication in Physical Review D
- Published
- 2018
26. Ω and ϕ production in Au + Au collisions at $$\sqrt{s_{_\mathrm{NN}}} = 11.5$$ s NN = 11.5 and 7.7 GeV in a dynamical quark coalescence model
- Author
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Jing-Han Chen, Chun-Jian Zhang, Song Zhang, Xiao-Hai Jin, Yu-Gang Ma, and C. Zhong
- Subjects
Quantum chromodynamics ,Physics ,Quark ,Nuclear and High Energy Physics ,Phase transition ,Particle physics ,Strange quark ,010308 nuclear & particles physics ,Elliptic flow ,Parton ,01 natural sciences ,Omega ,Nuclear Energy and Engineering ,Phase space ,0103 physical sciences ,Nuclear Experiment ,010306 general physics - Abstract
The Ω and ϕ production in relativistic heavy-ion collisions is studied in a dynamical quark coalescence model using the phase space information of strange quarks from a multiphase transport (AMPT) model. Enhanced local parton density fluctuation is implemented in the AMPT to simulate the QCD phase transition dynamics. By studying the transverse momentum $$p_{\rm T}$$ spectra and the elliptic flow of the multi-strangeness particles, such as Ω and ϕ, and the $$\Omega /\phi $$ ratio as a function of $$p_{\rm T}$$ in the AMPT, we find that the new development improves the description of experimental data. The study motivates further experimental investigations of Ω and ϕ production in phase II of the Beam Energy Scan program at RHIC.
- Published
- 2018
27. Laser test of the prototype of CEE time projection chamber
- Author
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Jing-Han Chen, He Dong, Jun Xu, Cheng-Jian Lin, Y. C. Ge, Yong-jin Ye, Fei Lu, Peng Ma, Peng-Liu, Song Zhang, Chen Wu, H. L. Zang, Nan-Ru Ma, Chensheng Zhou, Hui-Ming Jia, Deqing Fang, Q. Li, C. Zhong, He Li, Long Du, Dong-Xi Wang, L. Liu, Yu-Gang Ma, Wen Huang, and Xiao-Hai Jin
- Subjects
Physics ,Nuclear and High Energy Physics ,Time projection chamber ,Physics::Instrumentation and Detectors ,010308 nuclear & particles physics ,business.industry ,Track (disk drive) ,Resolution (electron density) ,Laser ,01 natural sciences ,law.invention ,Optics ,Nuclear Energy and Engineering ,law ,0103 physical sciences ,Gas electron multiplier ,010306 general physics ,business ,Image resolution ,Energy (signal processing) ,Storage ring - Abstract
A prototype thick-GEM-based cooling storage ring external-target experiment (CEE) time projection chamber (TPC) is constructed and tested with the pulsed ultraviolet laser beams. The results indicate that the prototype TPC has a good performance in three-dimensional track resolution. In X direction the position resolution is about 0.2 mm, and in Y direction the position resolution is about 0.5 mm. The results also determine that the energy resolution is about 5.4%, which achieve the requirements of the CEE experiment and can be used to study the nuclear state equation and the quantum chromo dynamics.
- Published
- 2018
28. The strong decay patterns of $Z_c$ and $Z_b$ states in the relativized quark model
- Author
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Xiao-Hai Liu, Li Ma, Shi-Lin Zhu, Wei-Zhen Deng, Xiao-Lin Chen, Guang-Juan Wang, and Xiang Liu
- Subjects
Physics ,Particle physics ,Physics and Astronomy (miscellaneous) ,Meson ,High Energy Physics::Lattice ,Hadron ,Quark model ,Nuclear Theory ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,lcsh:Astrophysics ,Exotic hadron ,State (functional analysis) ,High Energy Physics - Phenomenology ,Pion ,High Energy Physics - Phenomenology (hep-ph) ,Excited state ,lcsh:QB460-466 ,lcsh:QC770-798 ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) - Abstract
Employing the relativized quark model and the quark-interchange model, we investigate the decay of the charged heavy quarkonium-like states $Z_c(3900)$, $Z_c(4020)$, $Z_c(4430)$, $Z_b(10610)$ and $Z_b(10650)$ into the ground and radially excited heavy quarkonia via emitting a pion meson. The $Z_c$ and $Z_b$ states are assumed to be hadronic molecules composed of open-flavor heavy mesons. The calculated decay ratios can be compared with the experimental data, which are useful in judging whether the molecule state assignment for the corresponding $Z_c$ or $Z_b$ state is reasonable or not. The theoretical framework constructed in this work will be helpful in revealing the underlying structures of some exotic hadrons., Comment: 19 pages, 4 figures, version published in EPJC
- Published
- 2018
- Full Text
- View/download PDF
29. Generating a resonance-like structure in the reaction $$B_c\rightarrow B_s \pi \pi $$ B c → B s π π
- Author
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Xiao-Hai Liu and Ulf-G. Meißner
- Subjects
Physics ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Hadron ,01 natural sciences ,Resonance (particle physics) ,Scattering amplitude ,Distribution (mathematics) ,Singularity ,0103 physical sciences ,Mass spectrum ,High Energy Physics::Experiment ,Invariant mass ,010306 general physics ,Engineering (miscellaneous) ,Mathematical physics ,Bar (unit) - Abstract
We investigate the process $$B_c^+\rightarrow B_s^0\pi ^+\pi ^0$$ via $$B\bar{K}^*$$ rescattering. The kinematic conditions for triangle singularities are perfectly satisfied in the rescattering diagrams. A resonance-like structure around the $$B\bar{K}$$ threshold, which we denote X(5777), is predicted to be present in the invariant mass distribution of $$B_s^0 \pi ^+$$ . Because the relative weak $$B\bar{K}$$ $$(I=1)$$ interaction does not support the existence of a dynamically generated hadronic molecule, X(5777) can be identified as a pure kinematical effect due to the triangle singularity. Its observation may help to establish a non-resonance interpretation for some XYZ particles.
- Published
- 2017
30. Understanding the Nature of Heavy Pentaquarks and Searching for them in Pion-Induced Reactions
- Author
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Xiao-Hai Liu
- Subjects
Scattering amplitude ,Physics ,Theoretical physics ,Singularity ,Pion ,Threshold effect ,Triangulation (social science) ,Kinematics - Published
- 2017
31. Bistatic high range resolution profiles of precessing cone‐shaped targets
- Author
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Xiao-feng Ai, Xiao-hai Zou, Shunping Xiao, Yongzhen Li, and Jin Liu
- Subjects
Physics ,Dynamic simulation ,Bistatic radar ,Optics ,business.industry ,Feature extraction ,High range resolution ,Bistatic scattering ,Electromagnetic wave scattering ,Electrical and Electronic Engineering ,Wideband ,business ,Projection (set theory) - Abstract
This study focuses on the bistatic high range resolution profiles (HRRPs) of precessing targets and considers how to utilise bistatic HRRPs for feature extraction. The movement model of the slippery bistatic scattering centres of precessing targets and the wideband bistatic echo model are introduced firstly. The dynamic simulation method of the bistatic HRRPs of the precessing target is presented using the bistatic scattering coefficients obtained via electromagnetic calculations, and the simulation results validate the theoretical analysis. Furthermore, the characteristics of the bistatic HRRP are analysed and show that the bistatic HRRP generally reflects the projection of the target onto the bisector of the bistatic angle, except that the bistatic angle is so wide that the bistatic HRRP is quite different from the monostatic HRRP. This research is helpful for imaging, and identifying precessing targets in the bistatic radar.
- Published
- 2013
32. Bistatic scattering centres of cone-shaped targets and target length estimation
- Author
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Jianhua Yang, Shunping Xiao, Yongzhen Li, Xiaofeng Ai, and Xiao-hai Zou
- Subjects
Physics ,FEKO ,General Computer Science ,Plane (geometry) ,Scattering ,business.industry ,Feature extraction ,Geodesy ,Symmetry (physics) ,Bistatic radar ,Optics ,Intersection ,Wideband ,business - Abstract
The bistatic scattering centres are commonly modeled as the fixed scattering centres for imaging; however, the location of the bistatic scattering centre changes with the bistatic geometry in some real scenes. This paper focuses on the bistatic scattering centres of cone-shaped targets and considers how to utilize the length of the bistatic high-resolution range profile (HRRP) for target identification. Firstly, the locations of the bistatic scattering centres on the edge of a cone-shaped target are deduced with the method of equivalent currents, which are the intersection points of the edge and the plane constructed by the symmetry axis and the bisector of the bistatic angle. Then, based on the above conclusion, the wideband echo model and bistatic HRRP of a cone-shaped target is deduced. Then, the relation between the length of the bistatic HRRP and target length is deduced, which is useful for target identification. Finally, the bistatic HRRPs of cone-shaped targets are calculated via the Feko software and the calculated results validate the theoretical analysis. This research provides an exact mathematics model for the echo simulation, imaging, feature extraction and identification of cone-shaped targets in the bistatic radar.
- Published
- 2012
33. Could the observation of X (5568) be a result of the near threshold rescattering effects?
- Author
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Xiao-Hai Liu and Gang Li
- Subjects
Physics ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,Scattering ,01 natural sciences ,Near threshold ,Amplitude ,Singularity ,Quantum mechanics ,Quantum electrodynamics ,0103 physical sciences ,Mass spectrum ,Invariant mass ,010306 general physics ,Engineering (miscellaneous) - Abstract
We investigate the invariant mass distributions of $$B_s\pi $$ via different rescattering processes. The triangle singularity which appears in the rescattering amplitude may simulate the resonance-like bump around 5568 MeV. However, because the scattering $$B_s^*\pi \rightarrow B_s\pi $$ is supposed to be weak, if the pertinent background is much larger, it would be hard to ascribe the observation of X(5568) to rescattering effects.
- Published
- 2016
34. Searching for charmoniumlike states with hiddenss¯
- Author
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Xiao-Hai Liu and Makoto Oka
- Subjects
Physics ,Scattering amplitude ,Particle physics ,Meson ,010308 nuclear & particles physics ,0103 physical sciences ,010306 general physics ,01 natural sciences ,Omega ,Nuclear theory ,Kinematic singularities - Abstract
We investigate the processes ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}J/\ensuremath{\psi}\ensuremath{\phi}$, $\ensuremath{\gamma}J/\ensuremath{\psi}\ensuremath{\omega}$, and ${\ensuremath{\pi}}^{0}J/\ensuremath{\psi}\ensuremath{\eta}$ to search for the charmoniumlike states with hidden $s\overline{s}$, such as $Y(4140)$, $Y(4274)$, $X(4350)$, and $X(3915)$. These processes receive contributions from the charmed-strange meson rescatterings. When the center-of-mass energies of ${e}^{+}{e}^{\ensuremath{-}}$ scatterings are taken around the ${D}_{s0}(2317){D}_{s}^{*}$, ${D}_{s1}(2460){D}_{s}$, or ${D}_{s1}(2460){D}_{s}^{*}$ threshold, the anomalous triangle singularities can be present in the rescattering amplitudes, which implies a nonresonance explanation about the resonancelike structures. The positions of the anomalous triangle singularities are sensitive to the kinematics, which offers us a criterion to distinguish the kinematic singularities from genuine particles.
- Published
- 2016
35. The role of anomalous triangle singularity in the understanding of the recently observed heavy pentaquark candidates Pc+(4380) and Pc+(4450)
- Author
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Qiang Zhao, Xiao-Hai Liu, and Qian Wang
- Subjects
Nuclear physics ,Physics ,Particle physics ,Angular distribution ,Singularity ,Scattering ,Vector meson ,Anomaly (physics) ,Resonance (particle physics) ,Pentaquark - Abstract
We discuss that the kinematic effects from the anomalous triangle singularity (ATS) can contribute to the enhancements of the newly observed heavy pentaquark candidates Pc+(4380) and Pc+(4450) in Λb → J/ψK− p. This may bring ambiguities on our understanding of the nature of these two enhancements. In order to distinguish the cases that the threshold enhancements are either produced by genuine states or by the nearby anomalous thresholds of the ATS, we propose to look for the pentaquark candidates in J/ψ photoproduction where the ATS cannot play a role. We show that if Pc+(4380) and Pc+(4450) are genuine states, their production via the s-channel process can be directly measured in the angular distribution at large scattering angles. It benefits from the feature that in the vector meson photoproduction the s-channel resonance excitations can be easily separated from the background t-channel diffractive process.
- Published
- 2016
36. Understanding the nature of the heavy pentaquarks and searching for them in pion-induced reactions
- Author
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Makoto Oka and Xiao-Hai Liu
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Nuclear Theory ,010308 nuclear & particles physics ,Hadron ,FOS: Physical sciences ,01 natural sciences ,Pentaquark ,High Energy Physics - Experiment ,Nuclear physics ,Nuclear Theory (nucl-th) ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,Amplitude ,Pion ,Singularity ,High Energy Physics - Phenomenology (hep-ph) ,0103 physical sciences ,High Energy Physics::Experiment ,Invariant mass ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,010306 general physics - Abstract
We investigate the reaction $\pi^- p \to \pi^- J/\psi p$ via the open-charm hadron rescattering diagrams. Due to the presence of the triangle singularity (TS) in the rescattering amplitudes, the TS peaks can simulate the pentaquark-like resonances arising in the $J/\psi p$ invariant mass distributions, which may bring ambiguities on our understanding of the nature of the exotic states. Searching for the heavy pentaquark in different processes may help us to clarify the ambiguities, because of the highly process-dependent characteristic of the TS mechanism., Comment: 15 pages, 3 figures, 4 tables
- Published
- 2016
- Full Text
- View/download PDF
37. How to understand the underlying structures of $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
- Author
-
Xiao-Hai Liu
- Subjects
Cusp (singularity) ,Physics ,Exotic state ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,Rescattering effect ,FOS: Physical sciences ,Model parameters ,Triangle singularity ,Quantum number ,01 natural sciences ,lcsh:QC1-999 ,Loop (topology) ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Excited state ,Quantum mechanics ,Tetraquark ,0103 physical sciences ,Atomic physics ,010306 general physics ,lcsh:Physics - Abstract
We investigate the possible rescattering effects which may contribute to the process $B^+\to J/\psi\phi K^+$. It is shown that the $D_{s}^{*+}D_{s}^-$ rescattering via the open-charmed meson loops, and $\psi^\prime \phi$ rescattering via the $\psi^\prime K_1$ loops may simulate the structures of $X(4140)$ and $X(4700)$, respectively. However, if the quantum numbers of $X(4274)$ ($X(4500)$) are $1^{++}$ ($0^{++}$), it is hard to to ascribe the observation of $X(4274)$ and $X(4500)$ to the $P$-wave threshold rescattering effects, which implies that $X(4274)$ and $X(4500)$ could be genuine resonances. We also suggest that $X(4274)$ may be the conventional orbitally excited state $\chi_{c1}(3P)$., Comment: 14 pages, 5 figures, 1 table
- Published
- 2016
- Full Text
- View/download PDF
38. Updated study of the ηc and ηc′ decays into light vector mesons
- Author
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Xiao-Hai Liu, Qian Wang, and Qiang Zhao
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,Annihilation ,Meson ,High Energy Physics::Experiment ,Nuclear Experiment ,Helicity ,Nuclear theory - Abstract
We re-investigate the exclusive decays of eta(c) and eta'(c) to a pair of light vector mesons, i.e. eta(c)(eta'(c)) -> V V. The long-distance intermediate meson loop (IML) effects are evaluated as a non-perturbative mechanism in addition to the short-distance c (c) over bar. annihilation contributions. We show that both processes can be reasonably well constrained with the help of the available experimental data. Since eta(c) and eta'(c) are the spin-0 partners of J/psi and psi', respectively, our study is useful for gaining insights into the pQCD helicity selection rule violations in charmonium decays and the long-standing "rho pi puzzle". (c) 2012 Elsevier B.V. All rights reserved.
- Published
- 2012
39. Searching for observable effects induced by anomalous triangle singularities
- Author
-
Makoto Oka, Xiao-Hai Liu, and Qiang Zhao
- Subjects
Nuclear and High Energy Physics ,Nuclear Theory ,Structure (category theory) ,FOS: Physical sciences ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear Theory (nucl-th) ,High Energy Physics - Experiment (hep-ex) ,Theoretical physics ,High Energy Physics - Phenomenology (hep-ph) ,Singularity ,0103 physical sciences ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,Nuclear theory ,Physics ,010308 nuclear & particles physics ,Triangulation (social science) ,Observable ,lcsh:QC1-999 ,High Energy Physics - Phenomenology ,Computer Science::Programming Languages ,Gravitational singularity ,Anomaly (physics) ,lcsh:Physics - Abstract
We investigate the anomalous triangle singularity (ATS) and its possible manifestations in various processes. We show that the ATS should have important impact on our understanding of the nature of some newly observed threshold states. Discussions on how to distinguish the ATS phenomena from genuine dynamic pole structures are presented., Comment: 13 pages, 5 figures, 1 table, version to appear in Phys. Lett. B
- Published
- 2015
40. Characteristic of Bistatic High-range Resolution Profiles of Rotational Symmetry Targets
- Author
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Jian-hua Yang, Xiao-feng Ai, Xiao-hai Zou, Shun-ping Xiao, and Yongzhen Li
- Subjects
Physics ,Bistatic radar ,Rotational symmetry ,High range resolution ,Electrical and Electronic Engineering ,Computational physics - Published
- 2011
41. Precession and Structural Parameter Estimation of the Cone-shaped Warhead Based on the Micro-Doppler
- Author
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Shun-ping Xiao, Xiao-feng Ai, Xiao-hai Zou, Feng Zhao, and Yongzhen Li
- Subjects
Physics ,Micro doppler ,Optics ,Warhead ,Cone (topology) ,business.industry ,Estimation theory ,Precession ,Electrical and Electronic Engineering ,business - Published
- 2011
42. Feature Extraction of Precession and Structure of Cone-shaped Object Based on Time-HRRP Distribution
- Author
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Shun-ping Xiao, Yongzhen Li, Xiao-hai Zou, Xiao-feng Ai, and Feng Zhao
- Subjects
Physics ,Distribution (number theory) ,Cone (topology) ,Feature extraction ,Precession ,Object based ,Structure (category theory) ,Geometry ,Electrical and Electronic Engineering - Published
- 2011
43. TETRAQUARK $X(ud\bar s\bar s)$ PRODUCTION IN pn → ΛΛX
- Author
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Qiang Zhao and Xiao-Hai Liu
- Subjects
Diquark ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Bar (music) ,Hadron ,Mass spectrum ,Degrees of freedom (statistics) ,General Physics and Astronomy ,Tetraquark ,State (functional analysis) ,Exotic hadron - Abstract
We propose to search for a tetraquark candidate [Formula: see text] in [Formula: see text] or ΛΛKK*. The existence of tetraquark state [Formula: see text] was predicted in the literature due to specific diquark effective degrees of freedom inside hadrons. In order to understand the underlying dynamics for exotic hadrons, a search for the tetraquark [Formula: see text] is strongly recommended. We make an estimate of the production rate of [Formula: see text] in an effective lagrangian theory. The proposed reaction involves two Λ production, of which the narrow widths make it a great advantage in the analysis of the final state missing mass spectrum.
- Published
- 2009
44. Observation of a Neutral Charmoniumlike StateZc(4025)0ine+e−→(D*D¯*)0π0
- Author
-
F. C. Ma, Zhiqing Liu, T. Johansson, J. F. Chang, J. F. Qiu, L. Fava, F. Nerling, X. Cai, H. Liang, X. Q. Hao, X. K. Chu, L. Zotti, Guangshun Huang, Q. P. Ji, C. Hu, S. L. Niu, X. Q. Li, P. L. Wang, Peilian Liu, Lingxuan Zhang, Y. J. Mo, Z. G. Wang, S. Qian, Jialun Ping, Z. Ning, Chi Zhang, M. Greco, X. Tang, P. Larin, Z. T. Sun, Z. A. Liu, V. Prasad, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, X. R. Zhou, Cheng Li, I. B. Nikolaev, J. H. Yin, H. Y. Zhang, H. H. Zhang, X. L. Luo, K. Zhang, X. Y. Zhang, G. F. Chen, M. Shao, Y. T. Gu, G. A. Chelkov, M. Bertani, Huan Ren, H. B. Li, H. S. Chen, T. Weber, A. G. Denig, C. L. Luo, M. Lara, J. B. Liu, Yaquan Fang, A. Q. Guo, J. Y. Zhang, K. Y. Liu, M. H. Gu, A. Yuncu, H. Y. Sheng, R. Baldini Ferroli, E. Fioravanti, C. X. Yu, W. P. Wang, Z. B. Li, E. H. Thorndike, Z. Haddadi, B. Zheng, R. G. Ping, Shan Wang, Y. J. Sun, Q. J. Xu, L. Yang, Y. P. Lu, F. Bianchi, L. Q. Qin, Xiao-Rui Lyu, Xiangdong Ruan, K. J. Zhu, C. C. Zhang, B. Zhong, L. B. Guo, I. Tapan, W. M. Song, K. Schoenning, Orhan Cakir, M. Maggiora, Ling Zhao, C. Leng, P. Kiese, Q. Liu, Y. K. Heng, G. S. Varner, X. L. Kang, A. Sarantsev, D. H. Wei, B. S. Zou, J. S. Lange, J. M. Bian, X. N. Li, H. Muramatsu, Ulrich Wiedner, K. Moriya, Y. H. Yan, Y. H. Guan, I. Uman, J. W. Zhao, Yang Qin, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, S. L. Olsen, R. A. Briere, Q. W. Zhao, Zhenyu Zhang, S. J. Zhao, D. Y. Wang, F. Feldbauer, Krisztian Peters, Haiping Peng, Liqing Xu, S. H. Zhang, F. A. Harris, L. L. Ma, M. Kornicer, Y. L. Han, X. S. Jiang, E. E. Eren, W. C. Yan, Zhiqiang Liu, Y. C. Zhu, T. Ma, Yu Zhang, Y. X. Xia, M. H. Ye, L. G. Xia, A. Amoroso, Yunlong Zhang, X. Liu, K. Li, Z. H. Qin, J. C. Chen, Kai Liu, J. H. Liu, X. Y. Shen, V. Santoro, Ke Wang, L. P. Zhou, X. C. Chen, X. L. Ji, Xuanhong Lou, L. L. Jiang, D. Bettoni, W. Gradl, Nasser Kalantar-Nayestanaki, A. Dbeyssi, M. Ripka, Z. J. Xiao, W. G. Li, Z. P. Mao, C. Z. Yuan, J. L. Zhang, R. Poling, H. P. Cheng, J. Fang, Tao Li, L. D. Liu, X. K. Zhou, Fang Liu, C. Morales Morales, L. Y. Dong, A. Calcaterra, Z. G. Zhao, J. Q. Zhang, X. M. Li, M. Qi, H. J. Yang, I. Denysenko, Jianping Zheng, E. Boger, M. Ullrich, Y. G. Xie, Z. Gao, S. Spataro, G. R. Liao, Li Zhou, Ch. Rosner, P. F. Duan, Serkant Ali Cetin, J. F. Hu, Fenfen An, A. Julin, Y. N. Pu, S. Zhu, W. J. Zheng, B. L. Wang, Y. Nefedov, Jin Li, Y. B. Zhao, S. X. Du, Y. F. Wang, X. P. Xu, J. B. Jiao, T. Held, T. C. Zhao, Z. J. Sun, H. Loehner, Jie Zhao, D. X. Lin, H. J. Lu, J. G. Lu, F. De Mori, C. Geng, Alexey Zhemchugov, H. M. Hu, T. Hussain, Y. Ding, B. J. Liu, X. Y. Zhou, W. Shan, J. Dong, Tao Luo, X. Y. Ma, M. G. Zhao, W. X. Gong, F. E. Maas, B. Y. Zhang, M. Lv, Lei Li, H. M. Liu, J. C. Li, J. W. Zhang, T. Hu, Y. N. Zhang, Cui Li, Q. L. Xiu, B. X. Yu, Y. Q. Wang, J. F. Sun, X. F. Wang, J. Zhuang, M. X. Luo, S. B. Liu, Q. M. Ma, C. H. Li, O. B. Kolcu, Jian Wei, Yucheng Huang, S. Nisar, C. J. Tang, B. Kloss, X. Y. Niu, X. H. Mo, L. S. Wang, Guangming Huang, Y. Hu, D. V. Dedovich, P. X. Shen, W. Kühn, Y. Yuan, Y. S. Zhu, J. J. Zhang, G. F. Cao, J. Min, H. L. Dai, Igor Boyko, S. Marcello, Y. Zeng, M. Destefanis, Z. Wu, Y. H. Zheng, Cong-Feng Qiao, L. W. Jiang, Bibo Ke, D. J. Ambrose, O. Albayrak, L. L. Wang, H. Cai, B. Wang, B. Kopf, Zhiqing Zhang, W. B. Yan, D. Xiao, M. N. Achasov, Z. A. Zhu, N. Yu. Muchnoi, X. Y. Jiang, Giulietto Felici, K. L. He, S. Pacetti, P. R. Li, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, Magnus Wolke, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, M. Z. Wang, Y. F. Liang, Jimin Zhao, C. Dong, S. Sosio, M. Y. Dong, D. P. Jin, Z. Y. Wang, G. X. Sun, J. V. Bennett, H. B. Liu, Li Yan, J. H. Zou, M. Albrecht, Z. Jiao, Fu-Hu Liu, D. H. Zhang, C. P. Shen, Joachim Pettersson, S. S. Sun, R. Q. Lu, Y. P. Guo, Z. P. Zhang, W. D. Li, R. E. Mitchell, Dayong Wang, N. Qin, D. W. Bennett, Zujian Wang, Q. Ouyang, H. X. Yang, I. Garzia, S. S. Fang, Y. B. Liu, Andrzej Kupsc, W. L. Yuan, M. L. Chen, Huihui Liu, J. P. Liu, J. G. Messchendorp, J. P. Dai, Qiunan Xu, K. Goetzen, Y. X. Yang, Z. H. Wang, G. F. Xu, S. Jin, Y. Guo, X. Y. Song, C. F. Redmer, Xiaocong Ai, A. Hafner, Q. Zhao, J. S. Huang, X. T. Huang, C. X. Liu, G. Rong, H. P. Huang, Y. Z. Sun, A. A. Zafar, Xiang Zhou, K. H. Rashid, Gang Zhao, H. W. Yu, S. J. Chen, S. Han, H. L. Ma, D. M. Li, L. H. Wu, M. Savrie, M. Pelizaeus, X. Y. Gao, Y. J. Mao, J. Y. Liu, Q. Gao, Y. N. Gao, Y. Zhang, Q. An, J. Z. Fan, X. Fang, Feng Liu, M. Ablikim, X. N. Ma, Y. T. Liang, A. Zallo, G. Li, C. D. Fu, M. Fritsch, C. Q. Feng, X. R. Chen, Z. Y. Deng, M. Kavatsyuk, Xingguo Li, B. X. Zhang, J. Z. Bai, S. Schumann, Yao Wang, X. B. Ji, M. Tiemens, P. Patteri, Xiao-Hai Liu, R. Kliemt, Jie Yu, T. J. Min, G. Cibinetto, and F. Li
- Subjects
Physics ,010308 nuclear & particles physics ,Electron–positron annihilation ,Analytical chemistry ,General Physics and Astronomy ,Mass spectrometry ,01 natural sciences ,Atomic mass ,Recoil ,0103 physical sciences ,Mass spectrum ,Pi ,Atomic physics ,Born approximation ,010306 general physics ,Bar (unit) - Abstract
We report a study of the process e(+)e(-) -> (D*(D) over bar*)(0)pi(0) using e(+)e(-) collision data samples with integrated luminosities of 1092 pb(-1) at root s = 4.23 GeV and 826 pb(-1) at root s = 4.26 GeV collected with the BESIII detector at the BEPCII storage ring. We observe a new neutral structure near the (D*(D) over bar*)(0) mass threshold in the pi(0) recoil mass spectrum, which we denote as Z(c)(4025)(0). Assuming a Breit-Wigner line shape, its pole mass and pole width are determined to be (4025.5(-4.7)(+2.0) +/- 3.1) MeV/c(2) and (23.0 +/- 6.0 +/- 1.0) MeV, respectively. The Born cross sections of e(+)e(-) -> Z(c)(4025)(0)pi(0) -> (D*(D) over bar*)(0)pi(0) are measured to be (61.6 +/- 8.2 +/- 9.0) pb at root s = 4.23 GeV and (43.4 +/- 8.0 +/- 5.4) pb at root s = 4.26 GeV. The first uncertainties are statistical and the second are systematic.
- Published
- 2015
45. Observation ofZc(3900)0ine+e−→π0π0J/ψ
- Author
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Yang Qin, S. Han, Y. X. Xia, X. K. Chu, X. L. Ji, G. A. Chelkov, S. L. Niu, X. K. Zhou, Fang Liu, I. Denysenko, F. Li, P. L. Wang, X. Q. Li, M. Greco, J. B. Jiao, Z. T. Sun, Z. A. Liu, V. Prasad, Peilian Liu, Lingxuan Zhang, Y. Ban, P. Weidenkaff, F. C. Ma, S. P. Wen, L. H. Wu, X. S. Qin, X. R. Zhou, Cheng Li, M. Savrie, B. Y. Zhang, X. L. Luo, H. X. Yang, H. B. Li, A. G. Denig, C. L. Luo, M. H. Gu, I. Garzia, X. Y. Gao, A. Yuncu, H. Y. Sheng, Jin Li, Yaquan Fang, Y. G. Xie, C. X. Yu, M. Maggiora, Ling Zhao, M. Bertani, Y. Ding, K. Y. Liu, B. Zheng, Li Zhou, Z. B. Li, K. Goetzen, R. G. Ping, C. C. Zhang, Y. Gao, B. Zhong, L. B. Guo, G. Li, X. Y. Jiang, Y. N. Pu, S. X. Du, Orhan Cakir, Sai-Juan Chen, Lei Zhao, Z. Haddadi, C. Leng, J. F. Qiu, W. P. Wang, P. Kiese, L. Yang, S. L. Olsen, M. Y. Dong, P. R. Li, F. Bianchi, H. Muramatsu, Huihui Liu, Ulrich Wiedner, R. A. Briere, H. B. Liu, Y. H. Guan, C. D. Fu, M. Kornicer, Kai Liu, Z. H. Wang, Z. Y. He, Z. L. Hou, X. S. Jiang, Yang Yang, C. Q. Feng, Jie Zhao, J. P. Liu, X. R. Chen, L. Fava, O. B. Kolcu, Y. J. Mao, Tao Luo, J. H. Zou, T. Ma, J. G. Messchendorp, W. Kühn, Z. Y. Deng, C. F. Redmer, D. X. Lin, F. De Mori, S. S. Sun, H. M. Hu, D. Y. Wang, Shan Wang, Xiao-Rui Lyu, F. Nerling, J. P. Dai, K. Schoenning, B. S. Zou, Y. L. Han, S. Schumann, Z. A. Zhu, M. G. Zhao, Y. Nefedov, A. Calcaterra, Z. G. Zhao, I. Uman, X. T. Huang, M. Ablikim, G. Rong, J. Y. Liu, Xingguo Li, Qiunan Xu, H. P. Huang, W. C. Yan, Yao Wang, Y. N. Zhang, M. H. Ye, R. E. Mitchell, G. X. Sun, J. V. Bennett, Li Yan, X. Y. Zhou, J. W. Zhang, A. A. Zafar, Z. J. Sun, H. Loehner, Y. F. Wang, G. S. Varner, C. Z. Yuan, J. Q. Zhang, Zhiqiang Liu, J. Z. Bai, W. G. Li, Yu Zhang, X. M. Li, W. Gradl, M. Ripka, L. P. Zhou, K. H. Rashid, G. F. Xu, Yunlong Zhang, C. P. Shen, J. M. Bian, Zhenyu Zhang, S. J. Zhao, Bibo Ke, S. Spataro, Z. Jiao, Fu-Hu Liu, Cui Li, D. H. Zhang, T. Hussain, J. C. Li, W. B. Yan, X. Y. Ma, S. Jin, W. X. Gong, J. Zhuang, B. X. Yu, Y. B. Zhao, X. P. Xu, M. Ullrich, Z. P. Mao, H. W. Yu, E. E. Eren, M. N. Achasov, Q. Gao, M. X. Luo, Jian Wei, Giulietto Felici, Yucheng Huang, D. V. Dedovich, C. H. Li, W. Shan, X. B. Ji, M. Tiemens, J. Dong, H. P. Cheng, J. Fang, Tao Li, S. Pacetti, X. Liu, H. J. Lu, J. G. Lu, Y. Zhang, Q. An, Z. J. Xiao, P. Patteri, Y. Q. Wang, Xiao-Hai Liu, Z. Gao, Lei Li, H. M. Liu, Y. J. Mo, S. Nisar, Q. Ouyang, L. D. Liu, L. Y. Dong, F. E. Maas, T. Hu, D. Bettoni, J. L. Zhang, R. Poling, X. N. Ma, Y. T. Liang, A. Zallo, P. Larin, Ke Li, H. S. Chen, Y. Guo, X. Y. Song, X. F. Wang, R. Kliemt, C. J. Tang, Ch. Rosner, Y. Hu, Guangshun Huang, J. C. Chen, J. Min, Y. P. Lu, S. S. Fang, J. Z. Fan, A. Zhemchugov, Q. M. Ma, B. Kloss, Serkant Ali Cetin, Huan Ren, M. Fritsch, Jianping Zheng, Jie Yu, T. Weber, G. F. Cao, B. Wang, X. Y. Niu, Y. B. Liu, H. L. Dai, Igor Boyko, Y. Yuan, Y. S. Zhu, H. Liang, D. Xiao, C. Morales Morales, Y. X. Yang, M. Kavatsyuk, Q. P. Ji, S. Zhu, A. Q. Guo, Xiangdong Ruan, H. H. Zhang, T. J. Min, K. J. Zhu, G. Cibinetto, S. Qian, Jialun Ping, Q. Liu, Y. P. Guo, Guangming Huang, P. X. Shen, W. J. Zheng, K. Zhang, Z. G. Wang, F. A. Harris, Z. P. Zhang, H. Y. Zhang, B. Kopf, Liqing Xu, S. H. Zhang, X. Y. Shen, Z. Wu, V. Santoro, W. M. Song, X. Y. Zhang, L. L. Ma, L. W. Jiang, J. S. Huang, D. W. Bennett, Zujian Wang, L. G. Xia, A. Amoroso, M. Lara, J. B. Liu, R. Baldini Ferroli, K. L. He, M. Lv, C. X. Liu, Zhiqing Zhang, Y. J. Sun, E. Boger, A. Dbeyssi, Andrzej Kupsc, Q. J. Xu, W. L. Yuan, M. Z. Wang, G. F. Chen, B. X. Zhang, A. Julin, X. N. Li, Q. L. Xiu, A. Hafner, Q. Zhao, Jimin Zhao, Haiping Peng, X. C. Lou, M. L. Chen, J. H. Liu, Z. H. Qin, Ke Wang, J. Y. Zhang, Y. Z. Sun, P. F. Duan, Fenfen An, B. L. Wang, T. C. Zhao, Xiang Zhou, R. Q. Lu, J. J. Zhang, M. Qi, H. J. Yang, M. Destefanis, X. H. Mo, L. S. Wang, N. Kalantar-Nayestanaki, X. Fang, L. L. Wang, H. Cai, Gang Zhao, Feng Liu, Y. K. Heng, Magnus Wolke, I. B. Nikolaev, Y. F. Liang, S. B. Liu, C. Dong, D. P. Jin, J. H. Yin, S. Sosio, M. Shao, Y. T. Gu, Dayong Wang, N. Qin, H. L. Ma, Joachim Pettersson, D. M. Li, E. Fioravanti, L. Zotti, M. Pelizaeus, C. Hu, X. L. Kang, X. Tang, A. Sarantsev, D. H. Wei, J. S. Lange, Q. W. Zhao, D. J. Ambrose, Xiaocong Ai, M. Albrecht, W. D. Li, I. Tapan, Y. H. Yan, J. W. Zhao, Y. C. Zhu, K. Moriya, T. Held, Z. Ning, Chi Zhang, Brent J. Liu, E. H. Thorndike, L. Q. Qin, Zhiqing Liu, F. Feldbauer, X. C. Chen, T. Johansson, J. F. Chang, Krisztian Peters, C. Geng, X. Cai, Y. H. Zheng, Cong-Feng Qiao, O. Albayrak, N. Yu. Muchnoi, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, Z. Y. Wang, X. Q. Hao, G. R. Liao, J. F. Hu, L. L. Jiang, J. F. Sun, S. Marcello, Y. Zeng, Y. B. Chen, Xiaofeng Zhu, and J. Z. Zhang
- Subjects
Physics ,010308 nuclear & particles physics ,Electron–positron annihilation ,Analytical chemistry ,General Physics and Astronomy ,State (functional analysis) ,01 natural sciences ,Atomic mass ,0103 physical sciences ,Pi ,Tetraquark ,Atomic physics ,010306 general physics ,Neutral state ,Zc(3900) - Abstract
Using a data sample collected with the BESIII detector operating at the BEPCII storage ring, we observe a new neutral state Z(c)(3900)(0) with a significance of 10.4 sigma. The mass and width are measured to be 3894.8 +/- 2.3 +/- 3.2 MeV/c(2) and 29.6 +/- 8.2 +/- 8.2 MeV, respectively, where the first error is statistical and the second systematic. The Born cross section for e(+)e(-) -> pi(0)pi(0) J/Psi and the fraction of it attributable to pi(0)Z(c)(3900)(0) -> pi(0)pi(0) J/Psi in the range E-c.m. = 4.19-4.42 GeV are also determined. We interpret this state as the neutral partner of the four-quark candidate Z(c)(3900)(+/-).
- Published
- 2015
46. Search forZc(3900)±→ωπ±
- Author
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S. Marcello, Y. Zeng, Zhe Sun, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, G. R. Liao, Y. F. Wang, G. S. Huang, Dan Wang, H. H. Liu, Z. Ning, J. Z. Bai, I. Tapan, Y. H. Yan, Y. J. Mo, T. Hussain, X. Y. Ma, C. Hu, L. D. Liu, X. K. Chu, X. Tang, Y. H. Zheng, S. Schumann, Cong-Feng Qiao, J. C. Li, J. Zhuang, I. B. Nikolaev, X. Q. Hao, Shan Wang, J. Min, H. J. Lu, W. X. Gong, J. W. Zhao, J. G. Lu, Xiao-Rui Lyu, Yao Wang, O. Albayrak, J. H. Yin, X. K. Zhou, Magnus Wolke, M. X. Luo, Jian Wei, D. V. Dedovich, H. B. Liu, Y. C. Zhu, N. Yu. Muchnoi, M. Shao, Y. T. Gu, Y. F. Liang, X. P. Xu, X. B. Ji, M. Tiemens, F. E. Maas, T. Hu, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, Peilian Liu, P. Patteri, D. P. Jin, Xiao-Hai Liu, B. Kopf, H. S. Chen, C. H. Li, X. L. Li, S. L. Olsen, Lingxuan Zhang, G. S. Varner, T. Held, Y. X. Yang, L. H. Wu, P. Larin, R. Kliemt, Li Zhou, J. S. Huang, D. W. Bennett, Zujian Wang, Y. P. Guo, P. Kiese, E. Fioravanti, M. Savrie, C. X. Liu, Z. Y. Wang, Jie Yu, D. J. Ambrose, A. Hafner, Q. Zhao, Y. Z. Sun, L. Zotti, Q. P. Ji, Yaquan Fang, M. Greco, R. A. Briere, L. L. Jiang, Serkant Ali Cetin, E. H. Thorndike, K. L. He, X. Fang, G. A. Chelkov, F. Feldbauer, I. R. Boyko, X. S. Jiang, T. J. Min, K. J. Zhu, Cen Zhang, X. H. Liu, L. Q. Qin, Guangming Huang, X. L. Kang, Feng Liu, Xichao Ruan, P. X. Shen, M. Albrecht, X. Y. Gao, A. Sarantsev, D. H. Wei, P. R. Li, S. W. Han, M. Maggiora, Ling Zhao, Liqing Xu, P. L. Wang, S. H. Zhang, X. Y. Shen, K. Schoenning, B. S. Zou, Z. Wu, M. Ablikim, W. D. Li, Huan Ren, V. Santoro, A. Calcaterra, Z. G. Zhao, J. S. Lange, J. B. Jiao, X. L. Ji, X. Y. Jiang, J. P. Dai, Lei Zhao, Z. Y. He, Z. L. Hou, G. Cibinetto, Ke Wang, L. W. Jiang, G. F. Xu, Y. Ding, Q. W. Zhao, Zhiqing Liu, Y. N. Pu, X. C. Chen, N. Qin, M. H. Ye, S. Jin, Jimin Zhao, B. J. Liu, T. Johansson, Zhiqing Zhang, M. H. Gu, C. Z. Yuan, J. F. Chang, Y. B. Zhao, Z. Y. Zhang, O. Cakir, H. Liang, Gang Zhao, Manuel Lara, H. Y. Sheng, G. Li, W. Shan, C. Geng, O. B. Kolcu, H. H. Zhang, R. Poling, P. F. Duan, W. Kühn, J. Dong, X. Cai, Jie Zhao, D. X. Lin, X. N. Ma, X. Y. Song, K. Moriya, Fenfen An, C. Leng, F. A. Harris, Alexey Zhemchugov, H. M. Hu, Z. A. Zhu, Z. J. Sun, H. Loehner, B. L. Wang, L. Y. Dong, Y. G. Xie, A. Zallo, C. X. Yu, F. H. Liu, C. F. Redmer, C. D. Fu, R. Q. Lu, S. Nisar, Z. P. Zhang, I. Uman, Z. Gao, S. L. Niu, T. C. Zhao, C. Q. Feng, X. R. Chen, C. J. Tang, K. Goetzen, Y. Hu, B. Wang, M. Qi, S. Qian, Q. An, Jialun Ping, H. J. Yang, Y. P. Lu, Jiaxi Liu, F. Li, J. W. Zhang, K. Zhang, C. P. Shen, H. B. Li, B. Kloss, F. C. Ma, Z. Y. Deng, M. Ripka, J. Q. Zhang, C. L. Luo, A. A. Zafar, X. Y. Zhang, X. Q. Li, W. J. Zheng, W. C. Yan, M. Fritsch, M. Kavatsyuk, Y. L. Han, J. B. Liu, Tao Luo, D. Xiao, Zhiqiang Liu, C. C. Zhang, Y. J. Sun, E. Boger, B. Zheng, R. G. Ping, B. Zhong, L. B. Guo, M. N. Achasov, Z. A. Liu, L. P. Zhou, Lei Li, B. X. Yu, M. Ullrich, Z. J. Xiao, B. X. Zhang, J. F. Qiu, V. Prasad, Yunlong Zhang, L. Fava, Z. P. Mao, Y. Ban, P. Weidenkaff, T. Ma, F. Nerling, Yang Qin, G. X. Sun, J. V. Bennett, K. Y. Liu, Li Yan, Yanping Huang, S. P. Wen, D. Bettoni, Alperen Yuncu, Jin Li, K. H. Rashid, X. H. Mo, L. S. Wang, X. S. Qin, X. R. Zhou, Z. B. Li, Z. Jiao, D. H. Zhang, Cheng Li, H. L. Dai, H. L. Ma, D. M. Li, H. P. Cheng, J. Fang, Tao Li, M. Bertani, M. Y. Dong, J. L. Zhang, Z. Haddadi, H. W. Yu, Y. X. Xia, L. L. Wang, H. Cai, H. Muramatsu, L. Yang, R. Baldini Ferroli, Krisztian Peters, M. Z. Wang, Y. T. Liang, Jianping Zheng, Ch. Rosner, X. N. Li, J. H. Zou, Andrzej Kupsc, S. Zhu, Haiping Peng, M. L. Chen, M. Pelizaeus, A. Q. Guo, S. J. Chen, W. Gradl, D. Y. Wang, M. Lv, W. M. Song, S. S. Sun, J. Y. Liu, S. X. Du, Z. H. Qin, J. J. Zhang, K. J. Li, M. Destefanis, Y. J. Mao, H. X. Yang, I. Garzia, F. De Mori, G. Felici, C. Dong, S. Sosio, J. P. Liu, Q. L. Xiu, Z. H. Wang, J. G. Messchendorp, Q. Gao, Y. N. Gao, X. Y. Zhou, Joachim Pettersson, Y. N. Guo, W. L. Yuan, Q. Ouyang, Qiunan Xu, S. S. Fang, Y. Zhang, Y. B. Liu, R. E. Mitchell, X. L. Luo, Xiaocong Ai, M. G. Zhao, Y. H. Yang, W. G. Li, Y. Q. Wang, A. G. Denig, Y. N. Zhang, W. P. Wang, F. Bianchi, X. M. Li, J. M. Bian, J. Z. Fan, S. J. Zhao, S. Spataro, X. T. Huang, E. E. Eren, Q. J. Xu, Fang Liu, J. C. Chen, Xuanhong Lou, G. Rong, H. P. Huang, Nasser Kalantar-Nayestanaki, C. Morales Morales, H. M. Liu, X. F. Wang, J. F. Hu, U. Wiedner, Z. G. Wang, H. Y. Zhang, I. Denysenko, Y. H. Guan, G. F. Cao, G. F. Chen, Q. M. Ma, J. Y. Zhang, B. Y. Zhang, S. B. Liu, X. Y. Niu, Y. Nefedov, Y. Yuan, Y. S. Zhu, Yu Zhang, Q. Liu, Tristan Weber, Y. K. Heng, L. L. Ma, L. G. Xia, A. Amoroso, A. Dbeyssi, M. Kornicer, A. Julin, Bibo Ke, W. B. Yan, S. Pacetti, and J. F. Sun
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Omega - Abstract
The decay ${Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ is searched for using data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies $\sqrt{s}=4.23$ and 4.26 GeV. No significant signal for the ${Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}$ is found, and upper limits at the 90% confidence level on the Born cross section for the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ are determined to be 0.26 and 0.18 pb at $\sqrt{s}=4.23$ and 4.26 GeV, respectively.
- Published
- 2015
47. Observation and Spin-Parity Determination of theX(1835)inJ/ψ→γKS0KS0η
- Author
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F. De Mori, I. Uman, H. J. Lu, J. G. Lu, F. Li, K. Goetzen, P. L. Wang, F. C. Ma, X. L. Luo, D. J. Ambrose, Z. H. Wang, R. Kliemt, X. Y. Zhou, F. E. Maas, M. Ullrich, C. Dong, T. Hu, Y. Ding, S. Qian, Jialun Ping, S. Sosio, K. Zhang, X. Y. Zhang, M. Lara, J. B. Liu, Jie Yu, Y. J. Sun, Y. P. Lu, C. F. Redmer, Xiaocong Ai, B. J. Liu, W. P. Wang, J. F. Qiu, M. Qi, X. F. Wang, Y. F. Wang, J. B. Jiao, F. Bianchi, Y. H. Zheng, X. T. Huang, H. J. Yang, Bibo Ke, L. Fava, W. B. Yan, Q. M. Ma, Cong-Feng Qiao, O. Albayrak, M. Albrecht, Y. B. Zhao, T. J. Min, A. A. Zafar, G. Rong, K. J. Zhu, H. P. Huang, Tao Luo, Y. J. Mao, W. Shan, W. Kühn, J. C. Li, M. N. Achasov, N. Yu. Muchnoi, Giulietto Felici, F. Nerling, W. D. Li, G. Cibinetto, X. Y. Ma, B. Kloss, S. Pacetti, J. Dong, W. X. Gong, Joachim Pettersson, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, X. Liu, Z. A. Zhu, X. Y. Niu, Y. Yuan, Z. J. Xiao, Y. Q. Wang, J. Zhuang, Serkant Ali Cetin, Y. L. Han, M. Y. Dong, Y. H. Guan, Y. S. Zhu, J. Z. Bai, Z. Y. Wang, S. Nisar, C. J. Tang, W. C. Yan, M. X. Luo, H. B. Liu, Yunlong Zhang, J. H. Zou, Zhiqiang Liu, Jian Wei, Y. Hu, C. H. Li, D. Bettoni, Yucheng Huang, D. V. Dedovich, I. Tapan, Y. H. Yan, S. S. Sun, J. W. Zhao, J. Y. Liu, Xiangdong Ruan, J. L. Zhang, H. W. Yu, E. H. Thorndike, B. X. Yu, R. Poling, Q. Liu, B. Wang, S. L. Niu, Y. C. Zhu, Yu Zhang, L. Q. Qin, Jianping Zheng, F. Feldbauer, Guangming Huang, X. Q. Li, D. Xiao, S. Zhu, X. B. Ji, S. J. Chen, M. Greco, R. E. Mitchell, Andrzej Kupsc, K. Li, X. K. Zhou, Fang Liu, M. Tiemens, C. P. Shen, L. L. Ma, S. Schumann, X. H. Mo, P. X. Shen, E. Boger, I. Denysenko, L. S. Wang, W. L. Yuan, Z. Wu, G. F. Xu, M. Lv, X. C. Chen, S. Han, T. Held, L. W. Jiang, L. P. Zhou, P. Patteri, Xiao-Hai Liu, Y. P. Guo, L. G. Xia, Q. L. Xiu, M. H. Ye, K. Y. Liu, S. B. Liu, B. Y. Zhang, S. Jin, M. L. Chen, A. Amoroso, P. Larin, Z. P. Zhang, Yao Wang, Jin Li, Y. J. Mo, M. H. Gu, Y. Nefedov, J. J. Zhang, M. Destefanis, A. Yuncu, L. L. Wang, Z. P. Mao, H. Cai, D. W. Bennett, Zujian Wang, Zhiqing Zhang, Z. B. Li, C. Geng, H. Y. Sheng, A. Dbeyssi, J. Min, Y. Guo, C. X. Yu, Orhan Cakir, G. Li, M. Kornicer, P. Kiese, Huan Ren, H. S. Chen, I. B. Nikolaev, S. L. Olsen, L. Zotti, C. Hu, H. P. Cheng, A. Julin, Y. N. Pu, J. Fang, Tao Li, H. B. Li, X. Y. Jiang, X. Y. Song, B. Zheng, Guangshun Huang, Cui Li, Q. Ouyang, R. G. Ping, C. D. Fu, X. Tang, C. Q. Feng, X. R. Chen, A. G. Denig, C. L. Luo, Z. T. Sun, R. A. Briere, J. H. Yin, K. H. Rashid, T. Weber, P. R. Li, S. S. Fang, Magnus Wolke, Q. Gao, Y. N. Gao, Z. A. Liu, M. Shao, Y. T. Gu, Y. F. Liang, Z. Y. Deng, D. P. Jin, H. L. Dai, Igor Boyko, X. S. Jiang, V. Prasad, Z. Gao, Y. B. Liu, Xingguo Li, Krisztian Peters, O. B. Kolcu, Q. P. Ji, Jie Zhao, D. X. Lin, B. Kopf, Y. Ban, P. Weidenkaff, X. Fang, Y. Zhang, C. Leng, Dayong Wang, N. Qin, Q. An, Alexey Zhemchugov, H. M. Hu, C. C. Zhang, B. Zhong, L. B. Guo, Ch. Rosner, S. P. Wen, X. S. Qin, X. R. Zhou, Feng Liu, E. Fioravanti, Cheng Li, K. Moriya, J. S. Huang, M. Ablikim, X. K. Chu, C. X. Liu, Liqing Xu, S. H. Zhang, X. Y. Shen, V. Santoro, K. L. He, H. Muramatsu, Ulrich Wiedner, J. W. Zhang, J. Z. Fan, H. Liang, Peilian Liu, J. Q. Zhang, Lingxuan Zhang, X. L. Kang, A. Sarantsev, H. H. Zhang, M. Z. Wang, G. A. Chelkov, T. Ma, X. N. Ma, D. H. Wei, J. S. Lange, Q. W. Zhao, Y. T. Liang, Yang Qin, Yaquan Fang, A. Zallo, R. Baldini Ferroli, Jimin Zhao, M. Maggiora, Ling Zhao, Y. X. Xia, K. Schoenning, B. S. Zou, Lei Zhao, Z. Y. He, Z. L. Hou, A. Calcaterra, Z. G. Zhao, Y. X. Yang, Q. J. Xu, Yang Yang, M. Fritsch, R. Q. Lu, M. Bertani, D. Y. Wang, Z. Haddadi, M. Kavatsyuk, M. G. Zhao, L. Yang, Z. J. Sun, H. Loehner, C. Z. Yuan, L. D. Liu, B. X. Zhang, X. N. Li, L. Y. Dong, Haiping Peng, Y. N. Zhang, W. Gradl, M. Ripka, J. H. Liu, Ke Wang, A. Hafner, Q. Zhao, W. J. Zheng, Y. Z. Sun, P. F. Duan, Z. G. Wang, Fenfen An, Xiang Zhou, B. L. Wang, T. C. Zhao, H. Y. Zhang, G. R. Liao, J. F. Hu, Gang Zhao, G. F. Chen, J. Y. Zhang, Y. K. Heng, J. M. Bian, Zhenyu Zhang, S. J. Zhao, E. E. Eren, J. C. Chen, Xuanhong Lou, Nasser Kalantar-Nayestanaki, C. Morales Morales, Chi Zhang, L. L. Jiang, J. F. Sun, S. Marcello, F. A. Harris, Y. Zeng, Z. Ning, Y. B. Chen, Zhiqing Liu, Xiaofeng Zhu, J. Z. Zhang, T. Johansson, J. F. Chang, X. Cai, X. Q. Hao, Shan Wang, Xiao-Rui Lyu, W. G. Li, G. S. Varner, X. M. Li, S. Spataro, X. P. Xu, Lei Li, X. L. Ji, H. M. Liu, Talib Hussain, G. F. Cao, Y. G. Xie, A. Q. Guo, Li Zhou, S. X. Du, W. M. Song, H. L. Ma, D. M. Li, Z. H. Qin, H. X. Yang, I. Garzia, M. Pelizaeus, Huihui Liu, J. P. Liu, J. G. Messchendorp, J. P. Dai, Qiunan Xu, L. H. Wu, M. Savrie, X. Y. Gao, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, Fu-Hu Liu, and D. H. Zhang
- Subjects
Nuclear physics ,Physics ,010308 nuclear & particles physics ,Electron–positron annihilation ,Partial wave analysis ,0103 physical sciences ,General Physics and Astronomy ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,Spin (physics) ,Parity (mathematics) ,01 natural sciences - Abstract
We report an observation of the process J/psi -> gamma X(1835) -> gamma(KSKS0)-K-0 eta at low (KSKS0)-K-0 mass with a statistical significance larger than 12.9s using a data sample of 1.31 x 109 J/psi events collected with the BESIII detector. In this region of phase space the (KSKS0)-K-0 system is dominantly produced through the f (0)(980). By performing a partial wave analysis, we determine the spin parity of the Xd1835_ to be J(PC) = 0(-+). The mass and width of the observed X(1835) are 1844 +/- 9(stat)(-25)(+16)(syst) MeV/c(2) and 192(-17)(+20)(sta)(-43)(+62)(syst) MeV, respectively, which are consistent with the results obtained by BESIII in the channel J/psi -> gamma pi(+)pi(-)eta'.
- Published
- 2015
48. Photoproduction of hidden charm pentaquark statesPc+(4380)andPc+(4450)
- Author
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Xiao-Hai Liu, Qiang Zhao, and Qian Wang
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Singularity ,Nuclear Theory ,High Energy Physics::Experiment ,Charm (quantum number) ,Nuclear Experiment ,Pentaquark - Abstract
We propose to study the pentaquark candidates of P-c(+) (4380) and P-c(+) (4450) in J/psi photoproduction and look for further experimental evidence for their nature. Since the photoproduction process does not satisfy the so-called "anomalous triangle singularity" condition their presence in J/psi photoproduction would conclude that they should be genuine states and provide further evidence for their existence.
- Published
- 2015
49. Measurement of the matrix elements for the decaysη→π+π−π0andη/η′→π0π0π0
- Author
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R. Kliemt, Y. H. Guan, X. L. Ji, R. Baldini Ferroli, Jie Yu, K. Goetzen, T. J. Min, K. J. Zhu, P. Kiese, Krisztian Peters, M. Z. Wang, Z. A. Liu, Y. Ding, G. Cibinetto, S. B. Liu, Z. Y. Zhang, R. A. Briere, Y. Nefedov, V. Prasad, B. J. Liu, G. S. Huang, X. S. Jiang, Y. Ban, P. Weidenkaff, X. N. Li, Haiping Peng, W. Kühn, Y. G. Xie, S. P. Wen, X. S. Qin, X. R. Zhou, H. H. Liu, J. C. Li, Li Zhou, C. Leng, Z. A. Zhu, Tao Luo, O. Cakir, Q. L. Xiu, Cheng Li, F. Li, X. N. Ma, A. Zallo, J. Zhuang, C. P. Shen, F. C. Ma, B. X. Yu, W. G. Li, X. H. Mo, L. S. Wang, A. G. Denig, Yaquan Fang, X. M. Li, M. X. Luo, X. K. Chu, C. Hu, X. Tang, J. Min, M. Fritsch, H. B. Liu, J. Z. Bai, M. H. Ye, W. L. Yuan, Q. Ouyang, Shan Wang, Xiao-Rui Lyu, L. L. Wang, H. Cai, X. P. Xu, X. B. Ji, M. Tiemens, J. Q. Zhang, Jian Wei, S. Spataro, P. Patteri, Bibo Ke, Xiao-Hai Liu, G. Li, S. S. Fang, I. Tapan, D. V. Dedovich, H. S. Chen, Alperen Yuncu, Jin Li, M. Kavatsyuk, C. D. Fu, C. Q. Feng, M. G. Zhao, Y. H. Yang, X. R. Chen, Y. H. Yan, S. Qian, Q. An, Jialun Ping, B. Kopf, Z. Y. Deng, Peilian Liu, M. Ripka, Y. F. Wang, H. L. Dai, Igor Boyko, W. B. Yan, J. F. Qiu, Y. B. Liu, Xingguo Li, Cen Zhang, H. M. Liu, Lingxuan Zhang, G. F. Xu, S. Jin, Y. J. Mo, K. L. He, Y. N. Zhang, Yang Qin, Y. B. Zhao, J. F. Hu, W. Shan, J. W. Zhao, S. W. Han, Giulietto Felici, J. H. Liu, L. Fava, K. Schoenning, B. S. Zou, T. Hussain, I. B. Nikolaev, J. H. Yin, S. Pacetti, G. F. Cao, H. J. Lu, J. G. Lu, K. Zhang, Xichao Ruan, G. S. Varner, M. Shao, Y. T. Gu, X. Y. Zhang, P. L. Wang, Jimin Zhao, B. X. Zhang, Y. X. Xia, X. L. Luo, F. Nerling, Ke Wang, Y. C. Zhu, X. Y. Ma, Y. J. Mao, M. H. Gu, W. X. Gong, K. Moriya, Y. Guo, H. X. Yang, Z. G. Wang, E. Fioravanti, H. Y. Sheng, I. Garzia, R. Poling, J. B. Liu, Y. J. Sun, E. Boger, Q. P. Ji, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Q. W. Zhao, X. K. Zhou, H. Y. Zhang, W. P. Wang, C. F. Redmer, R. Q. Lu, C. X. Yu, F. E. Maas, T. Hu, J. P. Liu, H. Liang, Y. P. Lu, F. Bianchi, Liqing Xu, S. H. Zhang, X. Y. Shen, E. H. Thorndike, V. Santoro, C. Dong, S. Sosio, S. Schumann, Yao Wang, G. F. Chen, L. Y. Dong, B. Zheng, R. G. Ping, C. H. Li, J. Y. Zhang, J. G. Messchendorp, P. F. Duan, Fenfen An, B. L. Wang, T. C. Zhao, M. Bertani, J. Dong, S. Nisar, L. H. Wu, M. Y. Dong, C. J. Tang, Z. Gao, Y. N. Pu, Z. Haddadi, L. Yang, W. J. Zheng, Guangming Huang, X. Y. Song, T. Held, Qiunan Xu, Mario Greco, S. L. Niu, Joachim Pettersson, Manuel Lara, P. X. Shen, Z. Wu, L. W. Jiang, Jie Zhao, D. X. Lin, M. Savrie, X. Q. Li, Y. Hu, Alexey Zhemchugov, H. M. Hu, Y. P. Guo, J. Y. Liu, J. H. Zou, Y. K. Heng, X. Y. Gao, Serkant Ali Cetin, F. H. Liu, S. S. Sun, W. C. Yan, A. Q. Guo, L. D. Liu, J. M. Bian, Y. L. Han, Zhiqing Zhang, Andrzej Kupsc, W. Gradl, S. J. Zhao, X. H. Liu, L. Q. Qin, Zhiqiang Liu, J. P. Dai, W. M. Song, Yunlong Zhang, J. W. Zhang, D. Bettoni, D. J. Ambrose, D. Y. Wang, X. Fang, E. E. Eren, J. B. Jiao, M. N. Achasov, L. P. Zhou, J. L. Zhang, M. Qi, H. J. Yang, F. Feldbauer, R. E. Mitchell, Feng Liu, Q. J. Xu, Jianping Zheng, M. L. Chen, F. A. Harris, Z. P. Mao, S. Zhu, J. C. Chen, M. Ablikim, M. Lv, X. C. Chen, X. Q. Hao, Fang Liu, Xuanhong Lou, Z. H. Qin, D. Xiao, S. X. Du, X. Y. Jiang, K. Y. Liu, Nasser Kalantar-Nayestanaki, Z. B. Li, H. P. Cheng, J. Fang, Tao Li, I. Denysenko, J. J. Zhang, P. Larin, M. Albrecht, A. A. Zafar, C. Morales Morales, M. Destefanis, H. B. Li, B. Kloss, Q. Gao, Y. N. Gao, B. Y. Zhang, C. L. Luo, C. Geng, Ch. Rosner, W. D. Li, Huan Ren, C. C. Zhang, B. Zhong, L. B. Guo, J. S. Huang, C. X. Liu, Lei Li, Ulrich Wiedner, Y. Zhang, T. Ma, Yanping Huang, K. H. Rashid, A. Calcaterra, Z. G. Zhao, Magnus Wolke, Y. F. Liang, H. H. Zhang, Z. J. Sun, D. P. Jin, H. Loehner, Tobias Weber, H. W. Yu, N. Qin, G. X. Sun, J. V. Bennett, Li Yan, J. Z. Fan, I. Uman, Z. Jiao, Y. T. Liang, D. H. Zhang, Y. H. Zheng, S. J. Chen, Z. P. Zhang, M. Ullrich, Z. J. Xiao, D. W. Bennett, Zujian Wang, K. J. Li, Z. H. Wang, Xiaocong Ai, H. L. Ma, D. M. Li, Y. Q. Wang, H. Muramatsu, M. Pelizaeus, X. T. Huang, Y. X. Yang, G. Rong, H. P. Huang, A. Hafner, Q. Zhao, Y. Z. Sun, Gang Zhao, Cong-Feng Qiao, O. Albayrak, N. Yu. Muchnoi, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, S. L. Olsen, Z. Y. Wang, Q. Liu, L. L. Ma, J. F. Sun, L. G. Xia, A. Amoroso, S. Marcello, A. Dbeyssi, Y. Zeng, Zhe Sun, M. Kornicer, A. Julin, F. De Mori, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, X. Y. Zhou, X. F. Wang, M. Maggiora, Ling Zhao, Q. M. Ma, X. Y. Niu, Y. Yuan, Y. S. Zhu, Yu Zhang, Lei Zhao, Z. Y. He, Z. L. Hou, C. Z. Yuan, G. A. Chelkov, Dan Wang, G. R. Liao, B. Q. Wang, Zhiqing Liu, T. Johansson, J. F. Chang, O. B. Kolcu, X. Cai, L. Zotti, L. L. Jiang, and Z. Ning
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Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,Electron–positron annihilation ,Dalitz plot ,01 natural sciences ,Prime (order theory) ,law.invention ,Matrix (mathematics) ,law ,0103 physical sciences ,Pi ,010306 general physics ,Collider - Abstract
Based on a sample of 1.31×109 J/ψ events collected with the BESIII detector at the BEPCII collider, Dalitz plot analyses of selected 79,625 η→π+π-π0 events, 33,908 η→π0π0π0 events, and 1,888 η′→π0π0π0 events are performed. The measured matrix elements of η→π+π-π0 are in reasonable agreement with previous measurements. The Dalitz plot slope parameters of η→π0π0π0 and η′→π0π0π0 are determined to be -0.055±0.014±0.004 and -0.640±0.046±0.047, respectively, where the first uncertainties are statistical and the second systematic. Both values are consistent with previous measurements, while the precision of the latter one is improved by a factor of 3. Final state interactions are found to have an important role in those decays.
- Published
- 2015
50. Observation of the isospin-violating decayJ/ψ→ϕπ0f0(980)
- Author
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P. R. Li, Xiangdong Ruan, Q. Liu, Orhan Cakir, L. L. Ma, I. Uman, L. G. Xia, D. J. Ambrose, A. Amoroso, R. Kliemt, S. L. Olsen, J. H. Liu, R. A. Briere, Xiaocong Ai, Yaquan Fang, A. Dbeyssi, Jie Yu, Jin Li, Ke Wang, X. S. Jiang, G. X. Sun, J. V. Bennett, Li Yan, A. Q. Guo, P. Larin, M. Kornicer, Z. Jiao, Fu-Hu Liu, D. H. Zhang, J. B. Jiao, M. G. Zhao, M. Albrecht, Bibo Ke, A. Julin, R. Poling, P. F. Duan, Z. G. Wang, W. M. Song, H. Y. Zhang, G. F. Chen, M. Ullrich, T. J. Min, J. Y. Zhang, W. B. Yan, K. J. Zhu, F. Li, F. C. Ma, W. D. Li, Y. K. Heng, K. Schoenning, B. S. Zou, Huan Ren, M. N. Achasov, J. M. Bian, D. Cronin-Hennessy, Zhenyu Zhang, S. J. Zhao, W. Lai, F. De Mori, Fenfen An, B. L. Wang, Giulietto Felici, X. L. Ji, G. Cibinetto, Y. J. Mo, J. C. Chen, Xuanhong Lou, S. Pacetti, Y. P. Guo, H. B. Li, X. Y. Zhou, H. L. Ma, Z. H. Qin, C. Morales Morales, Z. P. Zhang, Y. N. Pu, T. C. Zhao, X. K. Chu, D. M. Li, Talib Hussain, M. Maggiora, Ling Zhao, H. Muramatsu, X. F. Wang, D. W. Bennett, H. Liang, Zujian Wang, Y. H. Guan, H. S. Chen, T. Weber, A. G. Denig, C. L. Luo, J. F. Qiu, S. L. Niu, Q. A. Malik, Q. P. Ji, Lei Zhao, M. Pelizaeus, H. X. Yang, R. Baldini Ferroli, Q. M. Ma, B. Kloss, I. Garzia, Z. Y. He, Z. L. Hou, Yang Yang, Jie Zhao, D. X. Lin, X. Y. Niu, K. Li, I. Tapan, Kai Liu, J. Z. Bai, Peilian Liu, Q. J. Xu, D. Y. Wang, X. Q. Li, Y. Yuan, Y. S. Zhu, M. Greco, Alexey Zhemchugov, H. M. Hu, X. K. Zhou, Y. H. Yan, Fang Liu, L. Fava, Qun-Yao Wang, C. C. Zhang, S. Qian, Jialun Ping, B. Zhong, L. B. Guo, C. Dong, S. Sosio, J. W. Zhao, Y. J. Mao, Huihui Liu, I. Denysenko, J. Min, Y. B. Zhao, H. W. Yu, C. Leng, X. N. Li, K. Zhang, Liqing Xu, S. H. Zhang, X. Y. Shen, Zhiqing Liu, J. P. Liu, Y. C. Zhu, LiLi Zhang, W. Shan, X. Y. Zhang, F. Nerling, V. Santoro, J. Y. Liu, J. Dong, Li Zhou, Haiping Peng, J. W. Zhang, Y. Nefedov, M. Lara, Ulrich Wiedner, B. Y. Zhang, J. G. Messchendorp, Y. Ding, J. P. Dai, O. Bondarenko, Joachim Pettersson, Qiunan Xu, Andrzej Kupsc, W. L. Yuan, M. L. Chen, W. G. Li, Y. L. Han, T. Ma, M. Y. Dong, S. Han, M. Tiemens, Yunlong Zhang, X. M. Li, E. Boger, W. Kühn, B. Kopf, C. Z. Yuan, S. Spataro, Y. H. Zheng, Cong-Feng Qiao, K. Y. Liu, O. Albayrak, H. B. Liu, Y. J. Sun, Y. P. Lu, Y. Q. Wang, T. Johansson, J. F. Chang, S. Nisar, C. J. Tang, Y. Hu, J. Q. Zhang, D. Bettoni, J. L. Zhang, J. H. Zou, Q. Gao, M. H. Gu, A. Yuncu, H. Y. Sheng, X. P. Xu, S. X. Du, Tao Luo, B. X. Yu, L. H. Wu, Z. A. Zhu, T. Held, K. L. He, Yang Qin, S. S. Sun, A. Calcaterra, Z. G. Zhao, G. F. Xu, Jianping Zheng, S. Zhu, H. J. Lu, M. Savrie, X. B. Ji, J. G. Lu, M. Lv, Y. Zhang, W. C. Yan, Q. An, B. Wang, N. Yu. Muchnoi, Yuehong Xie, Lei Li, X. S. Kang, Heng-Yun Ye, J. Z. Fan, X. H. Mo, Shan Wang, H. M. Liu, M. Z. Wang, Jimin Zhao, D. Xiao, Zhiqiang Liu, L. S. Wang, Guangshun Huang, N. Kalantar-Nayestanaki, C. X. Yu, J. J. Zhang, M. H. Ye, M. Destefanis, F. E. Maas, X. Y. Gao, Magnus Wolke, Z. B. Li, L. Zotti, Xiao-Rui Lyu, G. F. Cao, Y. H. Zhang, Y. X. Xia, R. E. Mitchell, C. P. Shen, Y. F. Liang, L. P. Zhou, T. Hu, C. Hu, S. Jin, X. Tang, D. P. Jin, X. Cai, P. Patteri, Xiao-Hai Liu, Y. X. Yang, H. L. Dai, Igor Boyko, Z. J. Sun, H. Loehner, B. Zheng, R. G. Ping, R. Q. Lu, M. Qi, Z. P. Mao, O. B. Kolcu, X. Liu, X. Q. Hao, Y. F. Wang, Dayong Wang, N. Qin, Z. Y. Wang, L. L. Wang, H. Cai, P. L. Wang, G. S. Varner, Z. J. Xiao, H. H. Zhang, H. P. Cheng, G. A. Chelkov, J. Fang, Tao Li, Guangming Huang, K. Moriya, A. Hafner, E. H. Thorndike, J. C. Li, Q. Zhao, Y. Z. Sun, Z. Gao, Z. T. Sun, Y. Guo, Z. A. Liu, P. X. Shen, Z. Wu, Serkant Ali Cetin, Ch. Rosner, Z. H. Wang, L. W. Jiang, L. Q. Qin, J. Zhuang, F. Feldbauer, Xiang Zhou, M. X. Luo, Jian Wei, Zhiqing Zhang, C. F. Redmer, L. L. Jiang, Yucheng Huang, D. V. Dedovich, G. Li, Gang Zhao, X. C. Chen, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, L. D. Liu, H. P. Huang, S. B. Liu, M. Bertani, X. Y. Song, Y. Ban, P. Weidenkaff, Z. Haddadi, L. Yang, L. Y. Dong, X. Y. Ma, F. A. Harris, Sai-Juan Chen, C. Geng, W. X. Gong, Z. Ning, C. D. Fu, W. J. Zheng, W. Gradl, M. Ripka, C. Q. Feng, X. R. Chen, Z. Y. Deng, I. B. Nikolaev, S. P. Wen, J. H. Yin, K. Goetzen, X. S. Qin, X. R. Zhou, K. H. Rashid, Cheng Li, M. Shao, Y. T. Gu, Xingguo Li, E. Fioravanti, X. L. Kang, A. Sarantsev, D. H. Wei, J. S. Lange, Q. W. Zhao, C. H. Li, S. Ma, D. Toth, J. S. Huang, C. X. Liu, J. F. Sun, S. Marcello, Y. Zeng, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Krisztian Peters, G. R. Liao, J. F. Hu, X. N. Ma, Y. T. Liang, A. Zallo, M. Fritsch, M. Kavatsyuk, B. X. Zhang, Chi Zhang, Brent J. Liu, X. Fang, Feng Liu, S. Schumann, Yao Wang, Q. L. Xiu, Q. Ouyang, S. S. Fang, Y. B. Liu, X. L. Luo, Y. Gao, W. P. Wang, and F. Bianchi
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,Branching fraction ,01 natural sciences ,Nuclear physics ,Isospin ,0103 physical sciences ,Pi ,Mass spectrum ,High Energy Physics::Experiment ,010306 general physics ,Radioactive decay - Abstract
Using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector at the BEPCII collider, the decays J/psi -> phi pi(+)pi(-)pi(0) and J/psi -> phi pi(0)pi(0)pi(0) are investigated. The isospin- violating decay J/psi -> phi pi(0)f(0)(980) with f(0)(980)-> pi pi is observed for the first time. The width of the f(0)(980) obtained from the dipion mass spectrum is found to be much smaller than the world average value. In the pi(0)f(0)(980) mass spectrum, there is evidence of f(1)(1285) production. By studying the decay J/psi ->eta', the branching fractions of eta' -> pi(+)pi(-)pi(0) and eta' -> pi(0)pi(0)pi(0), as well as their ratio, are also measured.
- Published
- 2015
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