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1. The First GECAM Observation Results on Terrestrial Gamma‐Ray Flashes and Terrestrial Electron Beams

Author: Y. Zhao, J. C. Liu, S. L. Xiong, W. C. Xue, Q. B. Yi, G. P. Lu, W. Xu, F. C. Lyu, J. C. Sun, W. X. Peng, C. Zheng, Y. Q. Zhang, C. Cai, S. Xiao, S. L. Xie, C. W. Wang, W. J. Tan, Z. H. An, G. Chen, Y. Q. Du, Y. Huang, M. Gao, K. Gong, D. Y. Guo, J. J. He, B. Li, G. Li, X. Q. Li, X. B. Li, J. Y. Liao, J. Liang, X. H. Liang, Y. Q. Liu, X. Ma, R. Qiao, L. M. Song, X. Y. Song, X. L. Sun, J. Wang, J. Z. Wang, P. Wang, X. Y. Wen, H. Wu, Y. B. Xu, S. Yang, B. X. Zhang, D. L. Zhang, F. Zhang, P. Zhang, H. M. Zhang, Z. Zhang, X. Y. Zhao, S. J. Zheng, K. K. Zhang, X. B. Han, H. Y. Wu, T. Hu, H. Geng, H. B. Zhang, F. J. Lu, S. N. Zhang, and H. Yu
Subjects: terrestrial gamma‐ray flashes, terrestrial electron beams, GECAM, Geophysics. Cosmic physics, QC801-809
Abstract: Abstract Gravitational‐wave high‐energy Electromagnetic Counterpart All‐sky Monitor (GECAM) is a space‐borne instrument dedicated to monitoring high‐energy transients, including Terrestrial Gamma‐ray Flashes (TGFs) and Terrestrial Electron Beams (TEBs). We implemented a TGF/TEB search algorithm for GECAM, with which 147 bright TGFs, 2 typical TEBs and 2 special TEB‐like events are identified during an effective observation time of ∼9 months. We show that, with gamma‐ray and charged particle detectors, GECAM can effectively identify and distinguish TGFs and TEBs, and measure their temporal and spectral properties in detail. A very high TGF‐lightning association rate of ∼80% is obtained between GECAM and GLD360 in east Asia region.
Published: 2023
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2. GRANDMA and HXMT Observations of GRB 221009A: The Standard Luminosity Afterglow of a Hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann

Author: D. A. Kann, S. Agayeva, V. Aivazyan, S. Alishov, C. M. Andrade, S. Antier, A. Baransky, P. Bendjoya, Z. Benkhaldoun, S. Beradze, D. Berezin, M. Boër, E. Broens, S. Brunier, M. Bulla, O. Burkhonov, E. Burns, Y. Chen, Y. P. Chen, M. Conti, M. W. Coughlin, W. W. Cui, F. Daigne, B. Delaveau, H. A. R. Devillepoix, T. Dietrich, D. Dornic, F. Dubois, J.-G. Ducoin, E. Durand, P.-A. Duverne, H.-B. Eggenstein, S. Ehgamberdiev, A. Fouad, M. Freeberg, D. Froebrich, M. Y. Ge, S. Gervasoni, V. Godunova, P. Gokuldass, E. Gurbanov, D. W. Han, E. Hasanov, P. Hello, T. Hussenot-Desenonges, R. Inasaridze, A. Iskandar, N. Ismailov, A. Janati, T. Jegou du Laz, S. M. Jia, S. Karpov, A. Kaeouach, R. W. Kiendrebeogo, A. Klotz, R. Kneip, N. Kochiashvili, N. Kunert, A. Lekic, S. Leonini, C. K. Li, W. Li, X. B. Li, J. Y. Liao, L. Logie, F. J. Lu, J. Mao, D. Marchais, R. Ménard, D. Morris, R. Natsvlishvili, V. Nedora, K. Noonan, K. Noysena, N. B. Orange, P. T. H. Pang, H. W. Peng, C. Pellouin, J. Peloton, T. Pradier, O. Pyshna, Y. Rajabov, S. Rau, C. Rinner, J.-P. Rivet, F. D. Romanov, P. Rosi, V. A. Rupchandani, M. Serrau, A. Shokry, A. Simon, K. Smith, O. Sokoliuk, M. Soliman, L. M. Song, A. Takey, Y. Tillayev, L. M. Tinjaca Ramirez, I. Tosta e Melo, D. Turpin, A. de Ugarte Postigo, S. Vanaverbeke, V. Vasylenko, D. Vernet, Z. Vidadi, C. Wang, J. Wang, L. T. Wang, X. F. Wang, S. L. Xiong, Y. P. Xu, W. C. Xue, X. Zeng, S. N. Zhang, H. S. Zhao, and X. F. Zhao
Subjects: Optical astronomy, Optical telescopes, Interstellar dust extinction, Gamma-ray bursters, Astronomy data modeling, Astrophysics, QB460-466
Abstract: Object GRB 221009A is the brightest gamma-ray burst (GRB) detected in more than 50 yr of study. In this paper, we present observations in the X-ray and optical domains obtained by the GRANDMA Collaboration and the Insight Collaboration. We study the optical afterglow with empirical fitting using the GRANDMA+HXMT-LE data sets augmented with data from the literature up to 60 days. We then model numerically using a Bayesian approach, and we find that the GRB afterglow, extinguished by a large dust column, is most likely behind a combination of a large Milky Way dust column and moderate low-metallicity dust in the host galaxy. Using the GRANDMA+HXMT-LE+XRT data set, we find that the simplest model, where the observed afterglow is produced by synchrotron radiation at the forward external shock during the deceleration of a top-hat relativistic jet by a uniform medium, fits the multiwavelength observations only moderately well, with a tension between the observed temporal and spectral evolution. This tension is confirmed when using the augmented data set. We find that the consideration of a jet structure (Gaussian or power law), the inclusion of synchrotron self-Compton emission, or the presence of an underlying supernova do not improve the predictions. Placed in the global context of GRB optical afterglows, we find that the afterglow of GRB 221009A is luminous but not extraordinarily so, highlighting that some aspects of this GRB do not deviate from the global known sample despite its extreme energetics and the peculiar afterglow evolution.
Published: 2023
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3. A Chebyshev Spectral Method with Null Space Approach for Boundary-Value Problems of Euler-Bernoulli Beam

Author: C. P. Hsu, C. F. Hung, and J. Y. Liao
Subjects: Physics, QC1-999
Abstract: We proposed a Chebyshev spectral method with a null space approach for investigating the boundary-value problem of a nonprismatic Euler-Bernoulli beam with generalized boundary or interface conditions. It is shown here that, with few vital improvements, a Chebyshev spectral collocation approach can be systematically applied to modeling nonprismatic Euler-Bernoulli beams with eigenvalue embedded tip-massed boundary conditions as well as the jump conditions that appear at the stepped interfaces. This study also presents a numerical stable asymptotic modal solution for the higher-order modes of a partially clamped beam and show that the proposed approach validates the robust higher-order modal solutions. Through a sequence of four increasingly complicated examples, using the proposed approach with higher-order modes, generalized boundary conditions, and interface jump conditions of nonprismatic beams, the results are in excellent agreement with those reported in the literature using various other approaches.
Published: 2018
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4. Upconversion Emission Modification and White Light Generation in NaYF 4:Yb 3+, Er 3+, Tm 3+ Nanocrystals/Opal Photonic Crystal Composites

Author: Z. W. Yang, Y. D. Wang, J. Y. Liao, J. Z. Yang, J. B. Qiu, and Z. G. Song
Subjects: Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467
Abstract: In this paper, we fabricated NaYF 4:Yb3+, Er3+, Tm3+ nanocrystal/opal photonic crystal composites by depositing NaYF 4:Yb3+, Er3+, Tm3+ nanocrystals on the surface of opal photonic crystals, and we investigated the influence of photonic bandgaps on upconversion (UC) emission properties of NaYF 4:Yb3+, Er3+, Tm 3+ nanocrystals. When the photonic bandgaps overlapped with the UC emission bands of NaYF 4:Yb3+, Er3+, Tm3+ nanocrystals on the opal photonic crystal surfaces, the suppression or enhancement of UC emissions was observed due to the Bragg reflection effect of photonic crystal, resulting in the modification of red, green, and blue UC emissions. Thus, white UC emission was realized.
Published: 2015
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5. Insight-HXMT observation on 4U~1608--52: evolving spectral properties of a bright type-I X-ray burst

Author: Chen, Y. P., Zhang, S., Zhang, S. N., Ji, L., Kong, L. D., Santangelo, A., Qu, J. L., Lu, F. J., Li, T. P., Song, L. M., Xu, Y. P., Cao, X. L., Chen, Y., Liu, C. Z., Bu, Q. C., Cai, C., Chang, Z., Chen, G., Chen, L., Chen, T. X., Chen, Y. B., Cui, W., Cui, W. W., Deng, J. K., Dong, Y. W., Du, Y. Y., Fu, M. X., Gao, G. H., Gao, H., Gao, M., Ge, M. Y., Gu, Y. D., Guan, J., Guo, C. C., Han, D. W., Huang, Y., Huo, J., Jia, S. M., Jiang, L. H., Jiang, W. C., Jin, J., Li, B., Li, C. K., Li, G., Li, M. S., Li, W., Li, X., Li, X. B., Li, X. F., Li, Y. G., Li, Z. W., Liang, X. H., Liu, J. Y. Liao G. Q., Liu, H. W., Liu, X. J., Liu, Y. N., Lu, B., Lu, X. F., Luo, Q., Luo, T., Ma, X., Meng, B., Nang, Y., Nie, J. Y., Ou, G., Sai, N., Sun, L., Tan, Y., Tao, L., Tuo, Y. L., Wang, C., Wang, G. F., Wang, J., Wang, W. S., Wang, Y. S., Wen, X. Y., Wu, B. Y., Wu, B. B., Wu, M., Xiao, G. C., Xiao, S., Xiong, S. L., Yang, J. W., Yang, S., Yang, Yang-Ji, Yang, Yi-Jung, Yi, Q. B., Yin, Q. Q., You, Y., Zhang, A. M., Zhang, C. L., Zhang, C. M., Zhang, F., Zhang, H. M., Zhang, J., Zhang, T., Zhang, W. C., Zhang, W., Zhang, W. Z., Zhang, Yi., Zhang, Y. F., Zhang, Y. J., Zhang, Yue., Zhang, Z., Zhang, Z. L., Zhao, H. S., Zhao, X. F., Zheng, S. J., Zhou, D. K., Zhou, J. F., Zhu, Y., and Zhu, Y. X.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The evidences for the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environments in neutron star low-mass X-ray binaries (LMXB) were detected previously via spectral and timing analyses. Benefitting from a broad energy coverage of Insight-HXMT, we analyze one photospheric radius expansion (PRE) burst, and find an emission excess at soft X-rays. Our spectral analysis shows that, such an excess is not likely relevant to the disk reflection induced by the burst emission and can be attributed to an enhanced pre-burst/persistent emission. We find that the burst and enhanced persistent emissions sum up to exceed Eddington luminosity by $\sim$ 40 percentages. We speculate that the enhanced emission is from a region beyond the PRE radius, or through the Comptonization of the corona., Comment: accepted by JHEA(Journal of High Energy Astrophysics)
Published: 2019

6. The 2018 failed outburst of H 1743 – 322: Insight-HXMT, NuSTAR, and NICER views

Author: P J Wang, L D Kong, Y P Chen, S Zhang, S N Zhang, R Soria, L Ji, J L Qu, Y Huang, L Tao, M Y Ge, F J Lu, L Chen, T P Li, Y P Xu, X L Cao, Y Chen, C Z Liu, Q C Bu, C Cai, Z Chang, T X Chen, Y B Chen, W W Cui, Y Y Du, G H Gao, H Gao, Y D Gu, J Guan, C C Guo, D W Han, J Huo, S M Jia, W C Jiang, J Jin, B Li, C K Li, G Li, W Li, X Li, X B Li, X F Li, Z W Li, X H Liang, J Y Liao, B S Liu, H X Liu, H W Liu, X J Liu, X F Lu, Q Luo, T Luo, R C Ma, X Ma, B Meng, Y Nang, J Y Nie, G Ou, X Q Ren, N Sai, L M Song, X Y Song, L Sun, Y Tan, Y L Tuo, C Wang, L J Wang, W S Wang, Y S Wang, X Y Wen, B Y Wu, B B Wu, M Wu, G C Xiao, S Xiao, S L Xiong, R J Yang, S Yang, Yan Ji Yang, Yi Jung Yang, Q B Yi, Q Q Yin, Y You, F Zhang, H M Zhang, J Zhang, P Zhang, W C Zhang, W Zhang, Y F Zhang, Y H Zhang, H S Zhao, X F Zhao, S J Zheng, Y G Zheng, and D K Zhou
Subjects: Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, Astronomy and Astrophysics
Abstract: We studied the 2018 outburst of the black hole transient H 1743 − 322 with a series of Insight-HXMT, NICER, and NuSTAR observations, covering the 1–120 keV band. With our broad-band X-ray spectral modelling, we confirm that the source remained in the low/hard state throughout the month-long outburst, although it became marginally softer at peak flux. We detected Type-C quasi-periodic oscillations (QPOs) and followed the evolution of their properties. The QPO frequency increased from ∼0.1 to ∼0.4 Hz during the rising phase of the outburst and decreased again in the decline. Continuum X-ray flux, power-law photon index, QPO frequency, and QPO root-mean-square amplitude were positively correlated. The QPO amplitude was slightly higher in the soft X-ray band (typical values of 12–16 per cent, compared with 8–10 per cent in the hard band). Our spectral-timing results shed light on the initial rising phase in the low/hard state, which has rarely been monitored with such high cadence, time resolution, and broad-band coverage. Combining spectral and timing properties, we find that ‘failed’ (hard state only) and ‘successful’ outbursts follow the same initial evolutionary track, although the former class of outburst never reaches the threshold for a transition to softer (thermally dominated) accretion regimes.
Published: 2022
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7. Insight-HXMT Measurements of the Diffuse X-ray Background

Author: R Huang, W Cui, J Y Liao, S Zhang, S F Wang, J Jin, X F Lu, C C Guo, Y You, G Li, and J Zhang
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present an X-ray spectrum of the diffuse X-ray background (DXRB) between 1.5 and 120 keV, as measured with the Low-Energy Detector (LE) and the High-Energy Detector (HE) aboard the Insight-HXMT satellite, based on 'blank-sky' observations. LE covers a nominal energy range of 1-15 keV and HE 20-250 keV, but calibration issues and data quality narrowed the energy range for this work. The LE background was directly measured with `blind' detector modules, while the HE background was derived from Earth-occultation data. With the LE data alone, the measured DXRB spectrum can be well described by a power law; fitting the LE and HE data jointly, however, a spectral cut-off must be introduced in the model to account for the measurements above 30 keV. Modelling the combined spectrum with a cut-off power law, the best-fit photon index is 1.40, normalisation $9.57$~$\rm ph~cm^{-2}~s^{-1}~keV^{-1}~sr^{-1} $ (at 1 keV), and cut-off energy 55 keV, after correcting for the effects of the Earth albedo and atmospheric emission (which are significant in the HE band). Based on the best-fit cut-off power law, we derived the spectral energy distribution (SED) of the DXRB. The shape of the SED is in general agreement with the published measurements, but the overall normalization is lower by varying amounts, except for the HEAO-1 result, with which our result is in good agreement., Comment: 9 pages, 14 figures, published in MNRAS
Published: 2023
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8. Insight-HXMT study of the inner accretion disk in the black hole candidate EXO 1846-031

Author: X. Q. Ren, Yanan Wang, S. N. Zhang, R. Soria, L. Tao, L. Ji, Y. J. Yang, J. L. Qu, S. Zhang, L. M. Song, M. Y. Ge, Y. Huang, X. B. Li, J. Y. Liao, H. X. Liu, R. C. Ma, Y. L. Tuo, P. J. Wang, W. Zhang, and D. K. Zhou
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: We study the spectral evolution of the black hole candidate EXO 1846$-$031 during its 2019 outburst, in the 1--150 keV band,with the {\it {Hard X-ray Modulation Telescope}}. The continuum spectrum is well modelled with an absorbed disk-blackbody plus cutoff power-law, in the hard, intermediate and soft states. In addition, we detect an $\approx$6.6 keV Fe emission line in the hard intermediate state. Throughout the soft intermediate and soft states, the fitted inner disk radius remains almost constant; we suggest that it has settled at the innermost stable circular orbit (ISCO). However, in the hard and hard intermediate states, the apparent inner radius was unphysically small (smaller than ISCO), even after accounting for the Compton scattering of some of the disk photons by the corona in the fit. We argue that this is the result of a high hardening factor, $f_{\rm col}\approx2.0-2.7$, in the early phases of outburst evolution, well above the canonical value of 1.7 suitable to a steady disk. We suggest that the inner disk radius was close to ISCO already in the low/hard state. Furthermore, we propose that this high value of hardening factor in the relatively hard state is probably caused by the additional illuminating of the coronal irradiation onto the disk. Additionally, we estimate the spin parameter with the continuum-fitting method, over a range of plausible black hole masses and distances. We compare our results with the spin measured with the reflection-fitting method and find that the inconsistency of the two results is partly caused by the different choices of $f_{\rm col}$., Comment: 21 pages, 6 figures
Published: 2022

9. Physical origin of the non-physical spin evolution of MAXI J1820 + 070

Author: Cunguo Wang, Shaolin Xiong, B. S. Liu, B. B. Wu, H. Gao, J. Y. Liao, H. M. Zhang, R. C. Ma, Y. S. Wang, Y. F. Zhang, Xue-Feng Lu, C. Cai, Lian Tao, Shuinai Zhang, Tong Li, G. H. Gao, S. M. Jia, Tao Luo, M. Wu, X. Y. Song, Bo Li, Wenxiong Li, J. Jin, Xin-Fu Zhao, He-Yang Liu, S. Xiao, Lei Sun, Junqiang Zhang, J. L. Qu, Y. H. Tan, C. K. Li, Y. Nang, Peng Zhang, R. J. Yang, H. W. Liu, N. Sai, Yuan-Yuan Du, Y. G. Zheng, X. X. Li, Z. Chang, Y. B. Chen, Qiu-Yi Luo, Tian-Xiang Chen, Z. W. Li, F. J. Lu, Qingcui Bu, L. M. Song, S. J. Zheng, XiangYang Wen, X. H. Ma, Da-Wei Han, Ya Fang Huang, H. S. Zhao, Yuan You, Qi-Bin Yi, D. K. Zhou, P. J. Wang, W. S. Wang, Ge Ou, Yi Zhang, C. Z. Liu, Sisi Yang, J. Y. Nie, Xin Ren, Liang Zhang, Cheng-Cheng Guo, Ming-Yu Ge, L. Chen, Wan-Chang Zhang, Xiong Li, Yu-Dong Gu, X. J. Liu, Libin Wang, X. L. Cao, Q. Q. Yin, Y. P. Chen, Y. Wang, X. H. Liang, Fuqin Zhang, S. N. Zhang, Y. P. Xu, B. Y. Wu, Xuelong Li, J. Guan, L. D. Kong, Wei Cui, W. C. Zhang, Jia Huo, Gang Li, Wenhan Jiang, Bin Meng, Y. J. Yang, and G. C. Xiao
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Hardness ratio, Astrophysics::High Energy Astrophysical Phenomena, Spin transition, FOS: Physical sciences, Binary number, Astronomy and Astrophysics, Astrophysics, Black hole, Innermost stable circular orbit, Accretion disc, Space and Planetary Science, Coincident, Spectral analysis, 83C57, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract: We report on the Insight-HXMT observations of the new black hole X-ray binary MAXI J1820+070 during its 2018 outburst. Detailed spectral analysis via the continuum fitting method shows an evolution of the inferred spin during its high soft sate. Moreover, the hardness ratio, the non-thermal luminosity and the reflection fraction also undergo an evolution, exactly coincident to the period when the inferred spin transition takes place. The unphysical evolution of the spin is attributed to the evolution of the inner disc, which is caused by the collapse of a hot corona due to condensation mechanism or may be related to the deceleration of a jet-like corona. The studies of the inner disc radius and the relation between the disc luminosity and the inner disc radius suggest that, only at a particular epoch, did the inner edge of the disc reach the innermost stable circular orbit and the spin measurement is reliable. We then constrain the spin of MAXI J1820+070 to be a*=0.2^{+0.2}_{-0.3}. Such a slowly spinning black hole possessing a strong jet suggests that its jet activity is driven mainly by the accretion disc rather than by the black hole spin., Comment: 14 pages, 13 figures, 5 tables, accepted for publication in MNRAS
Published: 2021
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10. HXMT identification of a non-thermal X-ray burst from SGR J1935+2154 and with FRB 200428

Author: Y. J. Jin, Z. Chang, J. Y. Liao, H. M. Zhang, Y. F. Zhang, X. B. Li, Y. G. Li, Chun-sheng Zhang, Wenhan Jiang, Bo Li, Yu-Xuan Zhu, G. H. Gao, J. Jin, M. Wu, Y. Zhang, Xin-Fu Zhao, Zhi Zhang, Y. H. Tan, Y. X. Zhu, R. C. Shang, C. Cai, B. Lu, Fuqin Zhang, J. K. Deng, S. N. Zhang, W. C. Xue, X. X. Li, Y. G. Zheng, J. F. Zhou, Ming-Yu Ge, X. H. Ma, Wenxiong Li, Tian-Xiang Chen, F. J. Lu, Y. S. Wang, D. K. Zhou, Wei Cui, T. Zhang, Aimei Zhang, Lin Lin, Li-Ming Song, B. S. Liu, Lei Sun, C. Z. Liu, S. J. Zheng, Luhua Jiang, Y. P. Xu, B. B. Wu, X. L. Cao, Tao Luo, XiangYang Wen, Xue-Feng Lu, Bin Meng, S. Xiao, Y. B. Chen, Junqiang Zhang, Tong Li, H. W. Liu, N. Sai, Mao-Shun Li, Yunchao Liu, Sisi Yang, Y. J. Yang, S. M. Jia, Yuan You, L. D. Kong, Songbo Zhang, Cunguo Wang, Qi-Bin Yi, Yu-Dong Gu, Q. Q. Yin, Y. P. Chen, Xuelong Li, J. Guan, X. J. Liu, W. Z. Zhang, Yuan-Yuan Du, Gang Chen, X. H. Liang, G. C. Xiao, R. L. Zhuang, GuoQing Liu, Jia Huo, Y. Nang, Gang Li, Shaolin Xiong, Y. J. Zhang, H. Gao, Qiu-Yi Luo, Z. Zhang, Y. L. Tuo, J. W. Yang, Bing Zhang, B. Y. Wu, Lian Tao, X. Y. Song, H. S. Zhao, G. F. Wang, W. S. Wang, Ge Ou, W. C. Zhang, J. Y. Nie, Yi-Qiao Dong, Cheng-Cheng Guo, C. K. Li, H. Xu, Z. W. Li, Da-Wei Han, Z. L. Zhang, M. X. Fu, Yue Zhang, Ya Fang Huang, J. Z. Wang, L. Chen, Wan-Chang Zhang, Weiguang Cui, Qingcui Bu, Min Gao, and J. L. Qu
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010504 meteorology & atmospheric sciences, X-ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Magnetar, 01 natural sciences, Coincidence, Radio spectrum, 0103 physical sciences, Thermal, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Event (particle physics), 0105 earth and related environmental sciences, Delay time
Abstract: Fast radio bursts (FRBs) are short pulses observed in radio band from cosmological distances. One class of models invoke soft gamma-ray repeaters (SGRs), or magnetars, as the sources of FRBs. Some radio pulses have been observed from some magnetars, however, no FRB-like events had been detected in association any magnetar burst, including one giant flare. Recently, a pair of FRB-like bursts (FRB 200428 hereafter) separated by milliseconds (ms) were detected from the general direction of the Galactic magnetar SGR J1935+2154. Here we report the detection of a non-thermal X-ray burst in the 1-250 keV energy band with the Insight-HXMT satellite, which we identify as emitted from SGR J1935+2154. The burst showed two hard peaks with a separation of 34 ms, broadly consistent with that of the two bursts in FRB 200428. The delay time between the double radio and X-ray peaks is about 8.57 s, fully consistent with the dispersion delay of FRB 200428. We thus identify the non-thermal X-ray burst is associated with FRB 200428 whose high energy counterpart is the two hard peaks in X-ray. Our results suggest that the non-thermal X-ray burst and FRB 200428 share the same physical origin in an explosive event from SGR J1935+2154., 24 pages, 9 figures, 6 tables; initial submission to a journal on May 9th, 2020. Significant changes include updated localization and detailed spectral evolution of the X-ray burst, and better determination of the two narrow X-ray peaks corresponding to the two radio pulses. Conclusions are strengthened. Nature Astronomy online on Feb. 18, 2021
Published: 2021
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11. The observation of the South Atlantic Anomaly with the particle monitors onboard Insight-HXMT

Author: Junqiang Zhang, J. Y. Liao, Xiang Li, F. J. Lu, Y. B. Chen, L. M. Song, Y. P. Xu, J. L. Qu, S. N. Zhang, X. L. Cao, C. Z. Liu, Tong Li, and H. S. Zhao
Subjects: 010308 nuclear & particles physics, Astronomy and Astrophysics, Geodesy, 01 natural sciences, Charged particle, Latitude, South Atlantic Anomaly, Secular variation, Earth's magnetic field, Space and Planetary Science, 0103 physical sciences, Particle, Stochastic drift, Longitude, 010303 astronomy & astrophysics, Geology
Abstract: The South Atlantic Anomaly (SAA) is a region of weakened geomagnetic field and in the previous studies, it shows a secular variation with time which is associated with the changing of the magnetic moment. This region also consists of large amounts of energetic charged particles and is danger to space vehicle and astronauts. Thus, it is essential to know the location and movement of the SAA. In this study, three particle monitors onboard Insight-HXMT are used to track the movement and location of the SAA from 2017 June 19 to 2019 June 19. Several particle flux maps are built to show the location of the SAA peak with time. In a grid of map, the particle count is determined by the maximum count rate and the averaged count rate, respectively. We find the results of both methods are consistent very well with each other in deriving the drift rate. The result shows the SAA peak moves westwards with an average drift rate of 0.43 ± 0.01 o /yr in longitude and moves northwards with an average drift rate of 0.17 ± 0.01 o /yr in latitude, and the drift rate is slightly larger than the result from IGRF 12 ( 0.3 o /yr) in longitude, but in latitude, the result of IGRF 12 have no obvious change with time.
Published: 2020
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12. Insight-HXMT study of the timing properties of Sco X-1

Author: J. Z. Wang, J. Y. Nie, Y. J. Yang, Xiaobo Li, Weiguang Cui, J. Guan, Qingcui Bu, L. M. Song, Yu-Dong Gu, G. C. Xiao, Luhua Jiang, J. Jin, D. K. Zhou, Y. X. Zhu, X. H. Liang, W. C. Zhang, B. Lu, GuoQing Liu, Ming-Yu Ge, Chun-sheng Zhang, Yi-Qiao Dong, Min Gao, B. B. Wu, Wenhan Jiang, Jia Huo, Y. H. Tan, Cheng-Cheng Guo, J. L. Qu, Gang Li, Y. B. Chen, F. J. Lu, Xin-Fu Zhao, R. C. Shang, J. F. Zhou, Bing Li, XiangYang Wen, Lian Tao, Y. S. Wang, Gang Chen, Wei Cui, B. Y. Wu, Tian-Xiang Chen, T. Zhang, X. Y. Song, X. J. Liu, Tao Luo, Da-Wei Han, Bin Meng, L. Chen, Mao-Shun Li, S. Xiao, Xue-Feng Lu, Tong Li, S. M. Jia, Fuqin Zhang, Z. Zhang, S. N. Zhang, Z. Chang, Yunchao Liu, R. L. Zhuang, Junqiang Zhang, Wan-Chang Zhang, W. S. Wang, Y. Nang, Ge Ou, Yuan-Yuan Du, W. Z. Zhang, Lei Sun, Y. J. Jin, C. Z. Liu, J. K. Deng, L. D. Kong, H. W. Liu, N. Sai, Shaolin Xiong, Cunguo Wang, Y. J. Zhang, X. H. Ma, H. Gao, Sisi Yang, Yupeng Xu, Qiu-Yi Luo, X. F. Li, H. S. Zhao, G. F. Wang, Y. L. Tuo, C. Cai, Wenxiong Li, J. W. Yang, Yu-Xuan Zhu, X. L. Cao, X. X. Li, S. J. Zheng, Yuan You, G. H. Gao, Qi-Bin Yi, M. Wu, Q. Q. Yin, Y. P. Chen, Y. Zhang, Y. G. Li, Aimei Zhang, J. Y. Liao, H. M. Zhang, Y. F. Zhang, Ya Fang Huang, Z. L. Zhang, C. K. Li, Z. W. Li, and M. X. Fu
Subjects: Physics, High energy, 010308 nuclear & particles physics, Phase (waves), Astronomy and Astrophysics, Astrophysics, Horizontal branch, 01 natural sciences, law.invention, Telescope, Root mean square, Space and Planetary Science, law, 0103 physical sciences, Modulation (music), 010303 astronomy & astrophysics, Energy (signal processing), Flare
Abstract: We present a detailed timing study of the brightest persistent X-ray source Sco X-1 using the data collected by the Hard X-ray Modulation Telescope ( I n s i g h t -HXMT) from July 2017 to August 2018. A complete Z-track hardness-intensity diagram (HID) is obtained. The normal branch oscillations (NBOs) at ∼ 6 Hz in the lower part of the normal branch (NB) and the flare branch oscillations (FBOs) at ∼ 16 Hz in the beginning part of the flaring branch (FB) are found in observations with the Low Energy X-ray Telescope (LE) and the Medium Energy X-ray Telescope (ME) of I n s i g h t -HXMT, while the horizontal branch oscillations (HBOs) at ∼ 40 Hz and the kilohertz quasi-periodic oscillations (kHz QPOs) at ∼ 800 Hz are found simultaneously above 20 keV for the first time on the horizontal branch (HB) by the High Energy X-ray Telescope (HE) and ME. We find that for all types of the observed QPOs, the centroid frequencies are independent of energy, while the root mean square (rms) increases with energy; the centroid frequencies of both the HBOs and kHz QPOs increase along the Z-track from the top to the bottom of the HB; and the NBOs show soft phase lags increasing with energy. A continuous QPO transition from the FB to NB in ∼ 200 s are also detected. Our results indicate that the non-thermal emission is the origin of all types of QPOs, the innermost region of the accretion disk is non-thermal in nature, and the corona is nonhomogeneous geometrically.
Published: 2020
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13. Peculiar disk behaviors of the black hole candidate MAXI J1348-630 in the hard state observed by Insight-HXMT and Swift

Author: W. Zhang, L. Tao, R. Soria, J. L. Qu, S. N. Zhang, S. S. Weng, L. Zhang, Y. N. Wang, Y. Huang, R. C. Ma, S. Zhang, M. Y. Ge, L. M. Song, X. Ma, Q. C. Bu, C. Cai, X. L. Cao, Z. Chang, L. Chen, T. X. Chen, Y. B. Chen, Y. Chen, Y. P. Chen, W. W. Cui, Y. Y. Du, G. H. Gao, H. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, J. Huo, S. M. Jia, W. C. Jiang, J. Jin, L. D. Kong, B. Li, C. K. Li, G. Li, T. P. Li, W. Li, X. Li, X. B. Li, X. F. Li, Z. W. Li, X. H. Liang, J. Y. Liao, B. S. Liu, C. Z. Liu, H. X. Liu, H. W. Liu, X. J. Liu, F. J. Lu, X. F. Lu, Q. Luo, T. Luo, B. Meng, Y. Nang, J. Y. Nie, G. Ou, X. Q. Ren, N. Sai, X. Y. Song, L. Sun, Y. Tan, Y. L. Tuo, C. Wang, L. J. Wang, P. J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. Y. Wu, B. B. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, R. J. Yang, S. Yang, Y. J. Yang, Y. R. Yang, Q. B. Yi, Q. Q. Yin, Y. Yuan, F. Zhang, H. M. Zhang, P. Zhang, W. C. Zhang, Y. F. Zhang, Y. H. Zhang, H. S. Zhao, X. F. Zhao, S. J. Zheng, Y. G. Zheng, and D. K. Zhou
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present a spectral study of the black hole candidate MAXI J1348-630 during its 2019 outburst, based on monitoring observations with Insight-HXMT and Swift. Throughout the outburst, the spectra are well fitted with power-law plus disk-blackbody components. In the soft-intermediate and soft states, we observed the canonical relation L ~ T_in^4 between disk luminosity L and peak colour temperature T_in, with a constant inner radius R_in (traditionally identified with the innermost stable circular orbit). At other stages of the outburst cycle, the behaviour is more unusual, inconsistent with the canonical outburst evolution of black hole transients. In particular, during the hard rise, the apparent inner radius is smaller than in the soft state (and increasing), and the peak colour temperature is higher (and decreasing). This anomalous behaviour is found even when we model the spectra with self-consistent Comptonization models, which take into account the up-scattering of photons from the disk component into the power-law component. To explain both those anomalous trends at the same time, we suggest that the hardening factor for the inner disk emission was larger than the canonical value of ~1.7 at the beginning of the outburst. A more physical trend of radii and temperature evolution requires a hardening factor evolving from ~3.5 at the beginning of the hard state to ~1.7 in the hard intermediate state. This could be evidence that the inner disk was in the process of condensing from the hot, optically thin medium and had not yet reached a sufficiently high optical depth for its emission spectrum to be described by the standard optically-thick disk solution., 20 pages, 10 figures, 4 tables, accepted by ApJ
Published: 2022

14. [Comparison of hip offset and rotation center reconstruction between robot-assisted and manual total hip arthroplasty]

Author: J Y, Liao, Z Y, Wang, J C, Liu, N, Hu, X, Liang, and W, Huang
Subjects: Male, Treatment Outcome, Arthroplasty, Replacement, Hip, Operative Time, Humans, Acetabulum, Female, Hip Prosthesis, Robotics, Middle Aged, Aged, Retrospective Studies
Published: 2022

15. Broadband variability study of MAXI J1631-479 in its Hard-Intermediate State observed with Insight-HXMT

Author: B. B. Wu, J. Y. Liao, H. M. Zhang, R. C. Ma, Xue-Feng Lu, Tong Li, S. M. Jia, X. L. Cao, Y. F. Zhang, X. B. Li, Tian-Xiang Chen, C. Cai, Bin Meng, W. C. Zhang, Y. B. Chen, C. Z. Liu, X. H. Liang, Qiu-Yi Luo, Y. Nang, Ya Fang Huang, Wenxiong Li, L. Zhang, L. Sun, Y. J. Yang, Sisi Yang, Andrea Santangelo, G. C. Xiao, Y. P. Xu, Y. L. Tuo, D. K. Zhou, Cheng-Cheng Guo, G. H. Gao, X. J. Liu, M. Wu, C. K. Li, Bo Li, Qingcui Bu, T. M. Belloni, L. M. Song, Libin Wang, Peng Zhang, Tao Luo, S. Xiao, Fuqin Zhang, Y. H. Zhang, Shaolin Xiong, S. N. Zhang, Z. W. Li, X. B. Ma, H. Gao, Y. S. Wang, Q. Q. Yin, Y. P. Chen, Y. H. Tan, J. Jin, Xin-Fu Zhao, L. D. Kong, Lian Tao, G. Li, X. Y. Song, J. Y. Nie, Cunguo Wang, Da-Wei Han, X. X. Li, Xuelong Li, J. Guan, H. W. Liu, N. Sai, Wenhan Jiang, S. J. Zheng, J. L. Qu, Hongfei Liu, Z. Chang, Yuan You, Qi-Bin Yi, J. Y. Zhang, Jia Huo, Wei Cui, F. J. Lu, Yu-Dong Gu, XiangYang Wen, Ming-Yu Ge, H. S. Zhao, Z. S. Li, P. J. Wang, B. Y. Wu, W. Zhang, L. Chen, W. S. Wang, Ge Ou, and Yuan-Yuan Du
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Jet (fluid), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Plasma, Astrophysics, Photon energy, law.invention, Telescope, Acceleration, Space and Planetary Science, Modulation, law, Precession, Astrophysics - High Energy Astrophysical Phenomena, Noise (radio)
Abstract: We report the energy-resolved broadband timing analysis of the black hole X-ray transient MAXI J1631-479 during its 2019 outburst from February 11 to April 9, using data from the Insight-Hard X-ray Modulation Telescope (Insight-HXMT), which caught the source from its hard intermediate state to the soft state. Thanks to the large effective area of Insight-HXMT at high energies, we are able to present the energy dependence of fast variability up to ~100 keV. Type-C quasi-periodic oscillations (QPOs) with frequency varying between 4.9 Hz and 6.5 Hz are observed in the 1-100 keV energy band. While the QPO fractional rms increases with photon energy from 1 keV to ~10 keV and remains more or less constant from ~10 keV to ~100 keV, the rms of the flat-top noise first increases from 1 keV to ~8 keV then drops to less than 0.1% above ~30 keV. We suggest that the disappearance of the broadband variability above 30 keV could be caused by the non-thermal acceleration in the Comptonizing plasma. At the same time, the QPOs could be produced by the precession of either a small-scale jet or a hot inner flow model., To be published in The Astrophysical Journal
Published: 2021

16. Insight-HXMT observation on 4U 1608–52: Evolving spectral properties of a bright type-I X-ray burst

Author: S. N. Zhang, W. C. Jiang, W. S. Wang, Ge Ou, Z. Chang, J. F. Zhou, X.Q. Ren, C. Z. Liu, C. L. Zhang, Tian-Xiang Chen, Min Gao, H. S. Zhao, Sisi Yang, G. F. Wang, D. K. Zhou, Yi Zhang, X. J. Liu, J. L. Qu, G. C. Xiao, Jia Huo, Z. L. Zhang, Y. G. Li, M. X. Fu, Ya Fang Huang, Bing Li, F. Zhang, Chun-sheng Zhang, X. F. Li, Aimei Zhang, W. Z. Zhang, J. Z. Wang, Liang Sun, Y. B. Chen, Xue-Feng Lu, F. J. Lu, S. M. Jia, XiangYang Wen, Lian Tao, Yuan You, Junke Zhang, Gang Li, Y. S. Wang, Wei Zhang, B. Y. Wu, Qi-Bin Yi, B. B. Wu, Mao-Shun Li, Yunchao Liu, Y. J. Yang, Tao Luo, Xiaobo Li, L. D. Kong, S. Xiao, Yi-Qiao Dong, X. L. Cao, W. C. Zhang, Q. Luo, Weiguang Cui, X. X. Li, Yuan-Yuan Du, J. Y. Liao, H. M. Zhang, Gang Chen, Qingcui Bu, B. Lu, Y. H. Tan, J. K. Deng, Cheng-Cheng Guo, H. W. Liu, N. Sai, Q. Q. Yin, Y. P. Chen, Y. F. Zhang, C. K. Li, L. M. Song, Yu-Dong Gu, J. Jin, G. H. Gao, Xin-Fu Zhao, S. J. Zheng, Y. X. Zhu, C. Cai, Z. W. Li, Zhi-Xiang Zhang, X. H. Ma, Ming-Yu Ge, M. Wu, Y. Zhang, C. Wang, Wenxiong Li, Andrea Santangelo, Yu-Xuan Zhu, Shaolin Xiong, Luhua Jiang, Y. P. Xu, Y. J. Zhang, H. Gao, X. H. Liang, J. Guan, Ti-Pei Li, Y. L. Tuo, J. W. Yang, GuoQing Liu, Wei Cui, Long Ji, T. Zhang, L. Chen, J. Y. Nie, Da-Wei Han, Bin Meng, and Y. Nang
Subjects: Physics, Thermonuclear fusion, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Spectral properties, X-ray, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radius, Astrophysics, 01 natural sciences, symbols.namesake, Neutron star, Space and Planetary Science, 0103 physical sciences, Eddington luminosity, Reflection (physics), symbols, Spectral analysis, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: The evidences for the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environments in neutron star low-mass X-ray binaries (LMXB) were detected previously via spectral and timing analyses. Benefitting from a broad energy coverage of Insight-HXMT, we analyze one photospheric radius expansion (PRE) burst, and find an emission excess at soft X-rays. Our spectral analysis shows that, such an excess is not likely relevant to the disk reflection induced by the burst emission and can be attributed to an enhanced pre-burst/persistent emission. We find that the burst and enhanced persistent emissions sum up to exceed Eddington luminosity by ∼ 40 percentages. We speculate that the enhanced emission is from a region beyond the PRE radius, or through the Comptonization of the corona.
Published: 2019
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17. QPOs and Orbital elements of X-ray binary 4U 0115+63 during the 2017 outburst observed by Insight-HXMT

Author: Q Lou, Yuan You, Qi-Bin Yi, X. X. Li, S. J. Zheng, Cunguo Wang, J. Jin, H M Zhang, Xin-Fu Zhao, H. S. Zhao, Lei Sun, Wenhan Jiang, G. H. Gao, He-Yang Liu, Y. J. Yang, Xiong Li, Yu-Dong Gu, B. S. Liu, X. H. Ma, Y. P. Xu, Yi Zhang, Y. H. Tan, H. W. Liu, Y Z Ding, N. Sai, M. Wu, G. C. Xiao, W. C. Zhang, Yuan-Yuan Du, Y. G. Zheng, Y. Nang, C. Cai, L. Chen, C. Z. Liu, P. J. Wang, F. J. Lu, J. L. Qu, Bin Meng, Xue-Feng Lu, XiangYang Wen, L. D. Kong, Xuelong Li, J. Guan, S. M. Jia, Wenxiong Li, P Zhang, Fuqin Zhang, S. N. Zhang, Tian-Xiang Chen, Sisi Yang, X. L. Cao, C. K. Li, Y. B. Chen, D. K. Zhou, Y. S. Wang, Libin Wang, J. Y. Liao, Q. Q. Yin, Y. P. Chen, Lian Tao, Ti-Pei Li, R. C. Ma, Y. F. Zhang, Qingcui Bu, Bo Li, B. B. Wu, X. Y. Song, Shuang-Nan Zhang, Junqiang Zhang, W. S. Wang, L. M. Song, Wei Cui, Z. W. Li, Ming-Yu Ge, Wei Wang, Tao Luo, S. Xiao, Xin Ren, Ya Fang Huang, X. J. Liu, Jia Huo, C Zhi, Gang Li, B. Y. Wu, Shaolin Xiong, H. Gao, X. H. Liang, Y. L. Tuo, R. J. Yang, Wei Zhang, Cheng-Cheng Guo, Da-Wei Han, and J. Y. Nie
Subjects: Physics, Orbital elements, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, X-ray binary, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Light curve, 01 natural sciences, Spectral line, Luminosity, Neutron star, Wavelet, Space and Planetary Science, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Energy (signal processing)
Abstract: In this paper, we presented a detailed timing analysis of a prominent outburst of 4U 0115+63 detected by \textit{Insight}-HXMT in 2017 August. The spin period of the neutron star was determined to be $3.61398\pm 0.00002$ s at MJD 57978. We measured the period variability and extract the orbital elements of the binary system. The angle of periastron evolved with a rate of $0.048\pm0.003$ $yr^{-1}$. The light curves are folded to sketch the pulse profiles in different energy ranges. A multi-peak structure in 1-10 keV is clearly illustrated. We introduced wavelet analysis into our data analysis procedures to study QPO signals and perform a detailed wavelet analysis in many different energy ranges. Through the wavelet spectra, we report the discovery of a QPO at the frequency $\sim 10$ mHz. In addition, the X-ray light curves showed multiple QPOs in the period of $\sim 16-32 $ s and $\sim 67- 200 $ s. We found that the $\sim100$ s QPO was significant in most of the observations and energies. There exist positive relations between X-ray luminosity and their Q-factors and S-factors, while the QPO periods have no correlation with X-ray luminosity. In wavelet phase maps, we found that the pulse phase of $\sim 67- 200 $ s QPO drifting frequently while the $\sim 16-32 $ s QPO scarcely drifting. The dissipation of oscillations from high energy to low energy was also observed. These features of QPOs in 4U 0115+63 provide new challenge to our understanding of their physical origins., 14 pages, 9 figures, and 6 tables. This work has been submitted to MNRAS after the referee's report
Published: 2021

18. Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity

Author: Da-Wei Han, Luhua Jiang, Y. P. Xu, C. Cai, X. F. Li, Zhi Zhang, Mao-Shun Li, M. X. Fu, C. K. Li, Wenxiong Li, B. S. Liu, Wenhan Jiang, J. Z. Wang, X. H. Liang, Bing Li, Tao Luo, Y. B. Chen, B. Y. Wu, Weiguang Cui, S. Xiao, Qingcui Bu, Y. S. Wang, Z. W. Li, Chun-sheng Zhang, Yuan-Yuan Du, Xiaobo Li, X. L. Cao, J. Y. Nie, Y. X. Zhu, Ming-Yu Ge, Y. G. Zheng, Yi Jung Yang, J. Y. Liao, Min Gao, H. M. Zhang, Fuqin Zhang, S. N. Zhang, Y. Nang, Y. J. Jin, J. K. Deng, J. Guan, Wei Zhang, Z. Chang, Tian-Xiang Chen, Yi-Qiao Dong, Q. Q. Yin, Y. P. Chen, Cheng-Cheng Guo, Yunchao Liu, J. L. Qu, F. J. Lu, Long Ji, X. H. Ma, GuoQing Liu, Yan Ji Yang, Jia Huo, Gang Chen, W. C. Zhang, Y. F. Zhang, B. Lu, XiangYang Wen, B. B. Wu, Junqiang Zhang, Li-Ming Song, G Ou, Z. L. Zhang, Gang Li, Lian Tao, Y. H. Tan, D. K. Zhou, Xue-Feng Lu, Zhao Zhang, X. Y. Song, Ya Fang Huang, Tong Li, Lei Sun, L. Chen, Yuan You, J. F. Zhou, S. M. Jia, Yu-Xuan Zhu, Ling-Jun Wang, W. Z. Zhang, Qi-Bin Yi, Cunguo Wang, Wei Cui, T. Zhang, L. D. Kong, X. J. Liu, H. W. Liu, X. X. Li, Yu-Dong Gu, N. Sai, S. J. Zheng, Y. G. Li, Aimei Zhang, G. H. Gao, M. Wu, Y. Zhang, R. L. Zhuang, J. Jin, Xin-Fu Zhao, R. C. Shang, C. Z. Liu, Sisi Yang, Shaolin Xiong, Y. J. Zhang, H. Gao, Y. L. Tuo, J. W. Yang, Qiu-Yi Luo, G. C. Xiao, H. S. Zhao, Bin Meng, P. J. Wang, G. F. Wang, and W. S. Wang
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Swift, Physics, Astrophysics::High Energy Astrophysical Phenomena, Phase (waves), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Relative strength, Astrophysics::Cosmology and Extragalactic Astrophysics, Pulse (physics), Luminosity, symbols.namesake, Radiation pressure, Space and Planetary Science, Eddington luminosity, symbols, Astrophysics::Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, computer, Energy (signal processing), Astrophysics::Galaxy Astrophysics, computer.programming_language
Abstract: Based on Insight-HXMT data, we report on the pulse fraction evolution during the 2017–2018 outburst of the newly discovered first Galactic ultraluminous X-ray (ULX) source Swift J0243.6+6124. The pulse fractions of 19 observation pairs selected in the rising and fading phases with similar luminosity are investigated. The results show a general trend of the pulse fraction increasing with luminosity and energy at supercritical luminosity. However, the relative strength of the pulsation between each pair evolves strongly with luminosity. The pulse fraction in the rising phase is larger at luminosity below 7.71 × 1038 erg s−1, but smaller at above. A transition luminosity is found to be energy independent. Such a phenomenon is first confirmed by Insight-HXMT observations and we speculate that it may have relation with the radiation-pressure-dominated accretion disc.
Published: 2020

19. The Evolution of the Broadband Temporal Features Observed in the Black-hole Transient MAXI J1820+070 with Insight-HXMT

Author: Yanan Wang, Long Ji, S. N. Zhang, Mariano Méndez, J. L. Qu, Pierre Maggi, M. Y. Ge, Erlin Qiao, L. Tao, S. Zhang, Diego Altamirano, L. Zhang, X. Ma, F. J. Lu, T. P. Li, Y. Huang, S. J. Zheng, Y. P. Chen, Z. Chang, Y. L. Tuo, C. Güngör, L. M. Song, Y. P. Xu, X. L. Cao, Y. Chen, C. Z. Liu, Q. C. Bu, C. Cai, G. Chen, L. Chen, T. X. Chen, Y. B. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, L. D. Kong, B. Li, C. K. Li, G. Li, M. S. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. W. Li, X. H. Liang, J. Y. Liao, G. Q. Liu, H. W. Liu, X. J. Liu, Y. N. Liu, B. Lu, X. F. Lu, Q. Luo, T. Luo, B. Meng, Y. Nang, J. Y. Nie, G. Ou, N. Sai, R. C. Shang, X. Y. Song, L. Sun, Y. Tan, G. F. Wang, J. Wang, W. S. Wang, Y. D. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, B. Y. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, J. W. Yang, S. Yang, Y. J. Yang, Q. B. Yi, Q. Q. Yin, Y. You, A. M. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, T. Zhang, W. C. Zhang, W. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, X. F. Zhao, D. K. Zhou, J. F. Zhou, R. L. Zhuang, Y. X. Zhu, Y. Zhu, Lingjun Wang, Observatoire astronomique de Strasbourg (ObAS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Astronomy
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Range (particle radiation), Jet (fluid), Photon, 010504 meteorology & atmospheric sciences, Hardness ratio, Black holes, Astrophysics::High Energy Astrophysical Phenomena, Time lag, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Low-mass x-ray binary stars, Space and Planetary Science, 0103 physical sciences, Broadband, Transient (oscillation), Electronic band structure, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Compact objects, 0105 earth and related environmental sciences
Abstract: We study the evolution of the temporal properties of MAXI 1820+070 during the 2018 outburst in its hard state from MJD 58190 to 58289 with Insight-HXMT in a broad energy band 1-150 keV. We find different behaviors of the hardness ratio, the fractional rms and time lag before and after MJD 58257, suggesting a transition occurred at around this point. The observed time lags between the soft photons in the 1-5 keV band and the hard photons in higher energy bands, up to 150 keV, are frequency-dependent: the time lags in the low-frequency range, 2-10 mHz, are both soft and hard lags with a timescale of dozens of seconds but without a clear trend along the outburst; the time lags in the high-frequency range, 1-10 Hz, are only hard lags with a timescale of tens of milliseconds; first increase until around MJD 58257 and decrease after this date. The high-frequency time lags are significantly correlated to the photon index derived from the fit to the quasi-simultaneous NICER spectrum in the 1-10 keV band. This result is qualitatively consistent with a model in which the high-frequency time lags are produced by Comptonization in a jet., Comment: Accepted for publication in ApJ
Published: 2020
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20. Switches between accretion structures during flares in 4U 1901+03

Author: Z. Chang, Fuqin Zhang, S. N. Zhang, Qiu-Yi Luo, Y. B. Chen, B. B. Wu, Tao Luo, Aimei Zhang, J. Y. Zhang, Ming-Yu Ge, Armin Nabizadeh, Y. G. Li, S. Xiao, Y. L. Tuo, J. W. Yang, L. Chen, Chun-sheng Zhang, Peng Zhang, Yu-Dong Gu, Sergey S. Tsygankov, C. K. Li, Y. J. Jin, J. Y. Nie, M. X. Fu, Yue Zhang, X. J. Liu, Luhua Jiang, Y. P. Xu, Zhao Zhang, G. C. Xiao, Bo Li, H. Xu, Yu-Xuan Zhu, J. Z. Wang, X. H. Liang, W. Z. Zhang, L. Sun, Z. W. Li, G. H. Gao, Yanji Yang, Wan-Chang Zhang, Weiguang Cui, C. Cai, F. J. Lu, Yunchao Liu, Qingcui Bu, X. L. Cao, B. S. Liu, Bin Meng, D. K. Zhou, Y. J. Yang, Shaolin Xiong, Wenxiong Li, Tian-Xiang Chen, Lian Tao, Yi Zhang, Y. J. Zhang, M. Wu, Andrea Santangelo, XiangYang Wen, Suleimanov, H. Gao, Z. Zhang, L. D. Kong, X. Y. Song, Long Ji, W. C. Zhang, Q. B. Yi, B. Y. Wu, Mao-Shun Li, Q. Q. Yin, You-Hong Zhang, H. W. Liu, N. Sai, Da-Wei Han, J. Y. Liao, H. M. Zhang, Zhi Zhang, Ya Fang Huang, Y. F. Zhang, Min Gao, X. B. Li, B. Lu, J. L. Qu, Yi-Qiao Dong, Wenhan Jiang, Cheng-Cheng Guo, Y. S. Wang, Doroshenko, Yuan-Yuan Du, C. Z. Liu, Y X Zhu, Y. P. Chen, Sisi Yang, Y. H. Tan, J. F. Zhou, J. Jin, Xin-Fu Zhao, R. C. Shang, Xuelong Li, J. Guan, GuoQing Liu, Jia Huo, Gang Li, Lorenzo Ducci, Wei Cui, T. Zhang, Li-Ming Song, Xue-Feng Lu, Shuinai Zhang, S. M. Jia, He-Yang Liu, Y. Nang, R. L. Zhuang, J. K. Deng, C. Wang, X. H. Ma, H. S. Zhao, Ti-Pei Li, P. J. Wang, G. F. Wang, W. S. Wang, Ge Ou, Gang Chen, Yuan You, X. X. Li, and S. J. Zheng
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Accretion (astrophysics), Spectral line, Beam pattern, Neutron star, Accretion rate, Pulsar, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Polar cap, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: We report on our analysis of the 2019 outburst of the X-ray accreting pulsar 4U 1901+03 observed with Insight-HXMT and NICER. Both spectra and pulse profiles evolve significantly in the decaying phase of the outburst. Dozens of flares are observed throughout the outburst. They are more frequent and brighter at the outburst peak. We find that the flares, which have a duration from tens to hundreds of seconds, are generally brighter than the persistent emission by a factor of $\sim$ 1.5. The pulse profile shape during the flares can be significantly different than that of the persistent emission. In particular, a phase shift is clearly observed in many cases. We interpret these findings as direct evidence of changes of the pulsed beam pattern, due to transitions between the sub- and super-critical accretion regimes on a short time scale. We also observe that at comparable luminosities the flares' pulse profiles are rather similar to those of the persistent emission. This indicates that the accretion on the polar cap of the neutron star is mainly determined by the luminosity, i.e., the mass accretion rate., 11 pages, 8 figures, accepted for publication in MNRAS
Published: 2020

21. A search for prompt gamma-ray counterparts to fast radio bursts in the Insight-HXMT data

Author: C. Guidorzi, M. Marongiu, R. Martone, L. Nicastro, S. L. Xiong, J. Y. Liao, G. Li, S. N. Zhang, L. Amati, F. Frontera, M. Orlandini, P. Rosati, E. Virgilli, S. Zhang, Q. C. Bu, C. Cai, X. L. Cao, Z. Chang, G. Chen, L. Chen, T. X. Chen, Y. B. Chen, Y. P. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, M. Y. Ge, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, Y. Huang, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, L. D. Kong, B. Li, C. K. Li, M. S. Li, T. P. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. W. Li, X. H. Liang, B. S. Liu, C. Z. Liu, G. Q. Liu, H. W. Liu, X. J. Liu, Y. N. Liu, B. Lu, F. J. Lu, X. F. Lu, Q. Luo, T. Luo, R. C. Ma, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, J. L. Qu, N. Sai, R. C. Shang, L. M. Song, X. Y. Song, L. Sun, Y. Tan, L. Tao, Y. L. Tuo, C. Wang, G. F. Wang, J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. Y. Wu, B. B. Wu, M. Wu, G. C. Xiao, S. Xiao, Y. P. Xu, J. W. Yang, S. Yang, Y. J. Yang, Q. B. Yi, Q. Q. Yin, Y. You, A. M. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, T. Zhang, W. C. Zhang, W. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhang, X. F. Zhang, S. J. Zheng, D. K. Zhou, J. F. Zhou, Y. X. Zhu, Y. Zhu, and R. L. Zhuang
Subjects: radiation mechanism: non-thermal, Astrophysics::High Energy Astrophysical Phenomena, Continuum (design consultancy), Socio-culturale, FOS: Physical sciences, Context (language use), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Magnetar, 01 natural sciences, Luminosity, law.invention, Telescope, fast radio burst, radiation mechanism: non-thermal, law, 0103 physical sciences, fast radio burst, 010306 general physics, 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Gamma ray, Astronomy and Astrophysics, Stars, Neutron star, Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena
Abstract: No robust detection of prompt electromagnetic counterparts to fast radio bursts (FRBs) has yet been obtained, in spite of several multi-wavelength searches carried out so far. Specifically, X/gamma-ray counterparts are predicted by some models. We planned on searching for prompt gamma-ray counterparts in the Insight-Hard X-ray Modulation Telescope (Insight-HXMT) data, taking advantage of the unique combination of large effective area in the keV-MeV energy range and of sub-ms time resolution. We selected 39 FRBs that were promptly visible from the High-Energy (HE) instrument aboard Insight-HXMT. After calculating the expected arrival times at the location of the spacecraft, we searched for a significant excess in both individual and cumulative time profiles over a wide range of time resolutions, from several seconds down to sub-ms scales. Using the dispersion measures in excess of the Galactic terms, we estimated the upper limits on the redshifts. No convincing signal was found and for each FRB we constrained the gamma-ray isotropic-equivalent luminosity and the released energy as a function of emission timescale. For the nearest FRB source, the periodic repeater FRB180916.J0158+65, we find $L_{\gamma,iso}, Comment: 15 pages, 3 figures, 6 tables, accepted by A&A
Published: 2020
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22. Insight-HXMT firm detection of the highest energy fundamental cyclotron resonance scattering feature in the spectrum of GRO J1008-57

Author: M. Y. Ge, L. Ji, S. N. Zhang, A. Santangelo, C. Z. Liu, V. Doroshenko, R. Staubert, J. L. Qu, S. Zhang, F. J. Lu, L. M. Song, T. P. Li, L. Tao, Y. P. Xu, X. L. Cao, Y. Chen, Q. C. Bu, C. Cai, Z. Chang, G. Chen, L. Chen, T. X. Chen, Y. B. Chen, Y. P. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, Y. Huang, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, L. D. Kong, B. Li, C. K. Li, G. Li, M. S. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. W. Li, X. H. Liang, J. Y. Liao, B. S. Liu, G. Q. Liu, H. W. Liu, X. J. Liu, Y. N. Liu, B. Lu, X. F. Lu, Q. Luo, T. Luo, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, N. Sai, R. C. Shang, X. Y. Song, L. Sun, Y. Tan, Y. L. Tuo, C. Wang, G. F. Wang, J. Wang, L. J. Wang, W. S. Wang, Y. D. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, B. Y. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, H. Xu, J. W. Yang, S. Yang, Y. J. Yang, Q. B. Yi, Q. Q. Yin, Y. You, A. M. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, T. Zhang, W. C. Zhang, W. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, X. F. Zhao, S. J. Zheng, Y. G. Zheng, D. K. Zhou, J. F. Zhou, R. L. Zhuang, Y. X. Zhu, and Y. Zhu
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010504 meteorology & atmospheric sciences, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Cyclotron resonance, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Inelastic scattering, 01 natural sciences, Resonance (particle physics), Spectral line, Pulsar, Space and Planetary Science, 0103 physical sciences, Continuum (set theory), Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Line (formation)
Abstract: We report on the observation of the accreting pulsar GRO J1008-57 performed by Insight-HXMT at the peak of the source's 2017 outburst. Pulsations are detected with a spin period of 93.283(1) s. The pulse profile shows double peaks at soft X-rays, and only one peak above 20 keV. The spectrum is well described by the phenomenological models of X-ray pulsars. A cyclotron resonant scattering feature is detected with very high statistical significance at a centroid energy of $E_{\rm cyc}=90.32_{-0.28}^{+0.32}$ keV, for the reference continuum and line models, HIGHECUT and GABS respectively. Detection is very robust with respect to different continuum models. The line energy is significantly higher than what suggested from previous observations, which provided very marginal evidence for the line. This establishes a new record for the centroid energy of a fundamental cyclotron resonant scattering feature observed in accreting pulsars. We also discuss the accretion regime of the source during the Insight-HXMT observation., Comment: 8 pages, 3 figures, accepted for publication in ApJL
Published: 2020
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23. Constraining the transient high-energy activity of FRB180916.J0158+65 with Insight-HXMT followup observations

Author: L. Chen, Yu-Dong Gu, Ya Fang Huang, R. J. Yang, Y. J. Yang, L. Wang, Junqiang Zhang, Wenhan Jiang, Qiu-Yi Luo, X. H. Liang, C. Z. Liu, G. C. Xiao, B. Y. Wu, Y. L. Tuo, Sisi Yang, He-Yang Liu, Wei Cui, W. S. Wang, Xiaobo Li, Wei Zhang, G. H. Gao, Ge Ou, Bing Li, B. B. Wu, Bin Meng, C. Guidorzi, F. Frontera, Yi Zhang, C. Cai, Luciano Nicastro, Lei Sun, Mauro Orlandini, M. Wu, J. Jin, Xin-Fu Zhao, H. S. Zhao, Y. Nang, Cheng-Cheng Guo, Y. P. Xu, Tao Luo, Yuan You, Qingcui Bu, S. Xiao, C. K. Li, Qi-Bin Yi, Shaolin Xiong, P. J. Wang, Wenxiong Li, Y. B. Chen, J. Y. Liao, H. M. Zhang, L. D. Kong, B. S. Liu, X. X. Li, H. Gao, H. W. Liu, N. Sai, Z. W. Li, W. C. Zhang, R. C. Ma, Min Gao, Fuqin Zhang, Y. F. Zhang, S. N. Zhang, D. K. Zhou, C. Wang, J. L. Qu, J. Guan, Lorenzo Amati, Y. G. Zheng, Y. S. Wang, Xin Ren, Tian-Xiang Chen, E. Virgilli, Lian Tao, Z. Chang, Da-Wei Han, Jia Huo, Y. H. Tan, X. Y. Song, X. F. Li, Gang Li, P. Zhang, Ming-Yu Ge, J. Y. Nie, Yuan-Yuan Du, F. J. Lu, XiangYang Wen, X. H. Ma, Li-Ming Song, Xue-Feng Lu, Tong Li, S. M. Jia, X. J. Liu, X. L. Cao, Q. Q. Yin, Y. P. Chen, S. J. Zheng, ITA, and CHN
Subjects: Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Socio-culturale, Context (language use), Astrophysics, Magnetar, 01 natural sciences, law.invention, Telescope, stars: magnetars, law, 0103 physical sciences, 010306 general physics, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Fast radio burst, Detector, Astronomy and Astrophysics, radiation mechanisms: non-thermal, stars: magnetars, radiation mechanisms: non-thermal, Wavelength, Space and Planetary Science, Phase space, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract: A link between magnetars and fast radio burst (FRB) sources has finally been established. In this context, one of the open issues is whether/which sources of extra galactic FRBs exhibit X/gamma-ray outbursts and whether it is correlated with radio activity. We aim to constrain possible X/gamma-ray burst activity from one of the nearest extragalactic FRB sources currently known over a broad energy range, by looking for bursts over a range of timescales and energies that are compatible with being powerful flares from extragalactic magnetars. We followed up the as-yet nearest extragalactic FRB source at a mere 149 Mpc distance, the periodic repeater FRB180916.J0158+65, during the active phase on February 4-7, 2020, with the Insight-Hard X-ray Modulation Telescope (HXMT). Taking advantage of the combination of broad band, large effective area, and several independent detectors available, we searched for bursts over a set of timescales from 1 ms to 1.024 s with a sensitive algorithm, that had previously been characterised and optimised. Moreover, through simulations we studied the sensitivity of our technique in the released energy-duration phase space for a set of synthetic flares and assuming different energy spectra. We constrain the possible occurrence of flares in the 1-100 keV energy band to E, 10 pages, 3 figures, accepted by A&A
Published: 2020

24. X-ray reprocessing in accreting pulsar GX 301-2 observed with Insight-HXMT

Author: G. H. Gao, X. X. Li, M. Wu, S. J. Zheng, Y. G. Zheng, Y. Nang, Mauro Orlandini, J. Y. Liao, H. M. Zhang, Y. L. Tuo, Y. J. Yang, R. C. Ma, Y. F. Zhang, X. B. Li, B. S. Liu, Yuan You, X. Q. Ren, Yanji Yang, Armin Nabizadeh, C. Cai, L. Chen, Tian-Xiang Chen, Wenxiong Li, Wan-Chang Zhang, W. S. Wang, Yi Zhang, Ge Ou, Andrea Santangelo, R. J. Yang, Bo Li, Peng Zhang, Qiu-Yi Luo, B. B. Wu, Cunguo Wang, H. S. Zhao, Li-Ming Song, Ming-Yu Ge, C. K. Li, F. J. Lu, Xue-Feng Lu, Y. P. Chen, Shuinai Zhang, Tong Li, Y. H. Tan, P. J. Wang, J. Y. Zhang, Victor Doroshenko, Shaolin Xiong, S. M. Jia, XiangYang Wen, Ling-Jun Wang, H. Gao, Jiren Liu, X. H. Ma, Z. W. Li, Yuan-Yuan Du, C. Z. Liu, D. K. Zhou, Sisi Yang, Ya Fang Huang, J. Jin, Xin-Fu Zhao, G. Li, Tao Luo, S. Xiao, Yu-Dong Gu, X. J. Liu, D. Gavran, X. L. Cao, Q. Q. Yin, Q. B. Yi, B. Y. Wu, V. F. Suleimanov, L. D. Kong, Y. B. Chen, X. H. Liang, L. Sun, Fuqin Zhang, S. N. Zhang, Long Ji, Z. Chang, Y. H. Zhang, Y. P. Xu, Wenhan Jiang, H. W. Liu, N. Sai, Y. S. Wang, W. C. Zhang, Xuelong Li, J. Guan, Lian Tao, Cheng-Cheng Guo, X. Y. Song, Jia Huo, Lorenzo Ducci, J. Y. Nie, Bin Meng, Wei Cui, G. C. Xiao, Qingcui Bu, Da-Wei Han, J. L. Qu, Hongfei Liu, ITA, DEU, and CHN
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Accretion (meteorology), Astrophysics::High Energy Astrophysical Phenomena, X-ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radiation, 01 natural sciences, Neutron star, Pulsar, Space and Planetary Science, Ionization, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, 010306 general physics, Absorption (electromagnetic radiation), Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Equivalent width, Astrophysics::Galaxy Astrophysics
Abstract: We investigate the absorption and emission features in observations of GX 301-2 detected with Insight-HXMT/LE in 2017-2019. At different orbital phases, we found prominent Fe Kalpha, Kbeta and Ni Kalpha lines, as well as Compton shoulders and Fe K-shell absorption edges. These features are due to the X-ray reprocessing caused by the interaction between the radiation from the source and surrounding accretion material. According to the ratio of iron lines Kalpha and Kbeta, we infer the accretion material is in a low ionisation state. We find an orbital-dependent local absorption column density, which has a large value and strong variability around the periastron. We explain its variability as a result of inhomogeneities of the accretion environment and/or instabilities of accretion processes. In addition, the variable local column density is correlated with the equivalent width of the iron Kalpha lines throughout the orbit, which suggests that the accretion material near the neutron star is spherically distributed., Comment: 10 pages, 5 figures, 2 tables, accepted for publication in MNRAS
Published: 2020
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25. Discovery of delayed spin-up behavior following two large glitches in the Crab pulsar, and the statistics of such processes

Author: M. Y. Ge, S. N. Zhang, F. J. Lu, T. P. Li, J. P. Yuan, X. P. Zheng, Y. Huang, S. J. Zheng, Y. P. Chen, Z. Chang, Y. L. Tuo, Q. Cheng, C. Güngör, L. M. Song, Y. P. Xu, X. L. Cao, Y. Chen, C. Z. Liu, S. Zhang, J. L. Qu, Q. C. Bu, C. Cai, G. Chen, L. Chen, M. Z. Chen, T. X. Chen, Y. B. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, L. F. Hao, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, C. J. Jin, J. Jin, Y. J. Jin, L. D. Kong, B. Li, D. Li, C. K. Li, G. Li, M. S. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. W. Li, Z. X. Li, Z. Y. Liu, X. H. Liang, J. Y. Liao, G. Q. Liu, H. W. Liu, X. J. Liu, Y. N. Liu, B. Lu, X. F. Lu, Q. Luo, T. Luo, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, N. Sai, R. C. Shang, X. Y. Song, L. Sun, Y. Tan, L. Tao, C. Wang, G. F. Wang, J. Wang, J. B. Wang, M. Wang, N. Wang, W. S. Wang, Y. D. Wang, Y. S. Wang, X. Y. Wen, Z. G. Wen, B. B. Wu, B. Y. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, Y. H. Xu, W. M. Yan, J. W. Yang, S. Yang, Y. J. Yang, Q. B. Yi, Q. Q. Yin, Y. You, Y. L. Yue, A. M. Zhang, C. M. Zhang, D. P. Zhang, F. Zhang, H. M. Zhang, J. Zhang, T. Zhang, W. C. Zhang, W. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, X. F. Zhao, W. Zheng, D. K. Zhou, J. F. Zhou, X. Zhou, R. L. Zhuang, Y. X. Zhu, and Y. Zhu
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010504 meteorology & atmospheric sciences, Crab Pulsar, Astrophysics::High Energy Astrophysical Phenomena, Total frequency, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Glitch, Stars, Crab Nebula, Amplitude, Pulsar, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Spin-up, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences
Abstract: Glitches correspond to sudden jumps of rotation frequency ($\nu$) and its derivative ($\dot{\nu}$) of pulsars, the origin of which remains not well understood yet, partly because the jump processes of most glitches are not well time-resolved. There are three large glitches of the Crab pulsar, detected in 1989, 1996 and 2017, which were found to have delayed spin-up processes before the normal recovery processes. Here we report two additional glitches of the Crab pulsar occurred in 2004 and 2011 for which we discovered delayed spin up processes, and present refined parameters of the largest glitch occurred in 2017. The initial rising time of the glitch is determined as $, Comment: 25 pages, 8 figures
Published: 2020
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26. A Parametric Model to Reproduce the Background of the Insight-HXMT/HE Blind Detector

Author: Yuan You, Li-Ming Song, Xiaobo Li, Xue-Feng Lu, Rui Huang, Jianyin Nie, Juan Zhang, Shuang-Nan Zhang, Shu Zhang, J. Y. Liao, Si-Fan Wang, Jing Jin, Cheng-Cheng Guo, Zheng-Wei Li, Fangjun Lu, C. X. Liu, Zhi Chang, Yu-Peng Chen, Yifei Zhang, Hai-Sheng Zhao, Ming-Yu Ge, Yue Huang, Xufang Li, and Gang Li
Subjects: Physics, Space and Planetary Science, Detector, Parametric model, Astronomy and Astrophysics, Computational physics
Published: 2021
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27. Hot disk of the Swift J0243.6+6124 revealed by Insight-HXMT

Author: J. K. Deng, X. H. Ma, B. B. Wu, Min Gao, Lian Tao, L. Chen, Yi-Yan Yang, X. Y. Song, C. L. Zhang, Xue-Feng Lu, Shuinai Zhang, H. S. Zhao, S. M. Jia, C. Z. Liu, M. X. Fu, Y. Nang, Ya Fang Huang, Tao Luo, Wan-Chang Zhang, Bin Meng, Mao-Shun Li, Sisi Yang, X. X. Li, L. J. Qu, J. Z. Wang, Y. L. Tuo, G. F. Wang, J. W. Yang, W. C. Jiang, Tian-Xiang Chen, Weiguang Cui, Qingcui Bu, Yunchao Liu, Y. J. Jin, L. M. Song, Sergey S. Tsygankov, Y. J. Yang, V. Doroshenko, Ti-Pei Li, F. Zhang, Yuan-Yuan Du, S. J. Zheng, Gang Chen, W. S. Wang, J. Y. Liao, H. M. Zhang, Junke Zhang, Wenxiong Li, Qing-He Zhang, Ge Ou, Da-Wei Han, XiangYang Wen, J. Y. Nie, Y. F. Zhang, Andrea Santangelo, Shaolin Xiong, Bo Lu, J. Jin, Y. J. Zhang, Xuchao Zhao, H. Gao, W. Z. Zhang, Wei Zhang, G. H. Gao, Yi-Qiao Dong, Y. H. Tan, Cheng-Cheng Guo, M. Wu, Y. Zhang, Fangjun Lu, Y. B. Chen, Alexander A. Mushtukov, Z. Zhang, Long Ji, Y. P. Chen, Bing Li, Y. S. Wang, T. Zhang, Chun-sheng Zhang, Xiaobo Li, W. Hu, X. F. Li, X. H. Liang, C. L. Zou, Z. L. Zhang, C. K. Li, G. C. Xiao, H. Xu, Y. X. Zhu, Z. W. Li, Ming-Yu Ge, Z. J. Li, ShaoZhen Liu, L. D. Kong, Yidong Xu, Yu-Dong Gu, S. N. Zhang, Jia Huo, Gang Li, X. L. Cao, J. Zhao, J. Guan, Aimei Zhang, GuoQing Liu, Wei Cui, Yu-Xuan Zhu, X. J. Liu, Liang Sun, Y. G. Li, Luhua Jiang, Z. Chang, Yujuan Liu, H. W. Liu, and N. Sai
Subjects: Swift, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Magnetosphere, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Pulsar, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, computer.programming_language, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Scattering, Spectral properties, Astronomy and Astrophysics, Accretion (astrophysics), Neutron star, Radiation pressure, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, computer
Abstract: We report on analysis of observations of the bright transient X-ray pulsar \src obtained during its 2017-2018 giant outburst with Insight-HXMT, \emph{NuSTAR}, and \textit{Swift} observatories. We focus on the discovery of a sharp state transition of the timing and spectral properties of the source at super-Eddington accretion rates, which we associate with the transition of the accretion disk to a radiation pressure dominated (RPD) state, the first ever directly observed for magnetized neutron star. This transition occurs at slightly higher luminosity compared to already reported transition of the source from sub- to super-critical accretion regime associate with onset of an accretion column. We argue that this scenario can only be realized for comparatively weakly magnetized neutron star, not dissimilar to other ultra-luminous X-ray pulsars (ULPs), which accrete at similar rates. Further evidence for this conclusion is provided by the non-detection of the transition to the propeller state in quiescence which strongly implies compact magnetosphere and thus rules out magnetar-like fields., Submitted to MNRAS
Published: 2019
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28. Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT

Author: Tao Luo, J. Y. Zhang, B. B. Wu, G. H. Gao, Z. L. Zhang, Gang Chen, M. Wu, Y. Zhang, C. K. Li, Wei Zhang, Y. P. Chen, Y. H. Tan, Yi-Qiao Dong, H. Xu, Y. J. Jin, Victor Doroshenko, Shaolin Xiong, Z. W. Li, Cheng-Cheng Guo, F. J. Lu, Ya Fang Huang, Bo Li, Y. J. Zhang, J. Jin, J. K. Deng, H. Gao, L. Chen, Yi-Yan Yang, J. Y. Liao, H. M. Zhang, Tian-Xiang Chen, Yunchao Liu, XiangYang Wen, X. X. Li, Y. F. Zhang, X. B. Li, X. H. Ma, Can Güngör, Li-Ming Song, Xue-Feng Lu, Suo Liu, Xuchao Zhao, W. C. Zhang, Y. S. Wang, J. Zhao, Y. Nang, J. Y. Nie, S. J. Zheng, Mao-Shun Li, Lian Tao, X. H. Liang, L. Sun, Y. G. Li, Qing-He Zhang, Y. L. Tuo, Aimei Zhang, J. W. Yang, C. Z. Liu, S. M. Jia, X. Y. Song, Y. B. Chen, Luhua Jiang, W. Hu, L. J. Qu, H. W. Liu, Sisi Yang, Yu-Xuan Zhu, Z. Zhang, Long Ji, N. Sai, Yuan-Yuan Du, Chun-sheng Zhang, Wenhan Jiang, C. L. Zou, Yupeng Xu, X. J. Liu, X. L. Cao, Z. Chang, C. L. Zhang, Yujuan Liu, Wenxiong Li, B. Lu, S. N. Zhang, Andrea Santangelo, Y. X. Zhu, Ming-Yu Ge, Jia Huo, Gang Li, Lorenzo Ducci, Wei Cui, T. Zhang, W. Z. Zhang, Ti-Pei Li, Xuelong Li, J. Guan, Z. J. Li, L. D. Kong, GuoQing Liu, Bin Meng, Yu-Dong Gu, Y. J. Yang, G. C. Xiao, Fuqin Zhang, W. S. Wang, Ge Ou, Da-Wei Han, Min Gao, H. S. Zhao, M. X. Fu, J. Z. Wang, Weiguang Cui, G. F. Wang, and Qingcui Bu
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Accretion (meteorology), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Theoretical models, FOS: Physical sciences, Static timing analysis, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radiation, 01 natural sciences, Luminosity, Magnetic field, QC Physics, Pulsar, Space and Planetary Science, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Fermi Gamma-ray Space Telescope
Abstract: We present a study of timing properties of the accreting pulsar 2S 1417-624 observed during its 2018 outburst, based on Swift/BAT, Fermi/GBM, Insight-HXMT and NICER observations. We report a dramatic change of the pulse profiles with luminosity. The morphology of the profile in the range 0.2-10.0keV switches from double to triple peaks at $\sim2.5$ $\rm \times 10^{37}{\it D}_{10}^2\ erg\ s^{-1}$ and from triple to quadruple peaks at $\sim7$ $\rm \times 10^{37}{\it D}_{10}^2\ erg\ s^{-1}$. The profile at high energies (25-100keV) shows significant evolutions as well. We explain this phenomenon according to existing theoretical models. We argue that the first change is related to the transition from the sub to the super-critical accretion regime, while the second to the transition of the accretion disc from the gas-dominated to the radiation pressure-dominated state. Considering the spin-up as well due to the accretion torque, this interpretation allows to estimate the magnetic field self-consistently at $\sim7\times 10^{12}$G., 7 pages, 4 figures, 1 tables, accepted for publication in MNRAS
Published: 2019

29. First Report of Cucumber mosaic virus on Vigna marina in Taiwan

Author: T. C. Deng, W.-C. Huang, H.-L. Tsai, C.-H. Tsai, and J.-Y. Liao
Subjects: biology, Beet western yellows virus, Host (biology), food and beverages, Plant Science, biology.organism_classification, Chenopodium quinoa, Cucumber mosaic virus, Vigna marina, Agronomy, Alfalfa mosaic virus, Plant virus, Weed, Agronomy and Crop Science
Abstract: Vigna marina (Burm.) Merr., the dune bean or notched cowpea, is a tropical creeping vine that grows on sand dunes along the coastal regions of Taiwan. Although V. marina is a weed, some varieties are also grown for fodder and food. This legume is a natural host of Bean common mosaic virus in the Solomon Islands (1) and Alfalfa mosaic virus or Beet western yellows virus in Australia (2). In April 2009, plants of V. marina showing severe mosaic and chlorotic ringspots on the foliage were found in the coastal region of Hualien County in eastern Taiwan. Indirect ELISA on a single diseased plant showed positive results with antibodies against the cucumber isolate of Cucumber mosaic virus (CMV) but negative to Broad bean wilt virus-1, Broad bean wilt virus-2, and some potyviruses (Agdia Inc., Elkhart, IN). A pure isolate of CMV was obtained from V. marina through three successive passages of single lesion isolation in sap-inoculated Chenopodium quinoa. Results of mechanical inoculations showed that the CMV-V. marina isolate was successfully transmitted to C. amaranticolor, C. murale, C. quinoa, Chrysanthemum coronarium, Gomphrena globosa, Nicotiana benthamiana, N. tabacum cv. Vam-Hicks, Phaseolus limensis, P. lunatus, P. vulgaris, Tetragonia tetragonioides, V. marina, V. radiata, and V. unguiculata subsp. sesquipedalis. These results of artificial inoculations were confirmed by ELISA. Homologous reactions of the CMV-V. marina isolate with a stock polyclonal antiserum against the CMV-cucumber isolate (4) were observed in sodium dodecyl sulfate-immunodiffusion. To determine the specific CMV subgroup, total RNA was extracted from inoculated leaves of C. quinoa using the Total Plant RNA Extraction Miniprep System (Viogene, Sunnyvale, CA). A DNA fragment of 940 bp covering the 3′ end of the coat protein gene and C-terminal noncoding region of RNA-3 was amplified using the Cucumovirus-specific primers (3) after reverse transcription (RT)-PCR with AccuPower RT/PCR PreMix Kit (Bioneer, Daejeon, Korea). The product was gel purified by Micro-Elute DNA/Clean Extraction Kit (GeneMark Technology Co., Tainan, Taiwan) and cloned in yT&A Cloning Vector System (Yeastern Biotech Co., Taipei, Taiwan) for sequencing (Mission Biotech Co., Taipei, Taiwan) and the sequence was submitted to GenBank (No. HM015286). Pairwise comparisons of the sequence of CMV-V. marina isolate with corresponding sequences of other CMV isolates revealed the maximum (95 to 96%) nucleotide identities with CMV subgroup IB isolates (strains Nt9 and Tfn) compared with 94 to 95% identities with subgroup IA isolates (strains Y and Fny) or 77 to 78% identities with subgroup II (strains LS and Q). These results suggest that CMV is the causal agent for the mosaic disease of V. marina in Taiwan and the isolate belongs to subgroup I. To our knowledge, this is the first report of V. marina as a natural host of CMV. This strain of CMV with specific pathogenicity could threaten crop production in the coastal zones. In addition, V. marina associated with native coastal vegetation was injured by CMV infection, which might lead to ecological impacts on shoreline fading. References: (1) A. A. Brunt. Surveys for Plant Viruses and Virus Diseases in Solomon Islands. FAO, Rome, 1987. (2) C. Büchen-Osmond, ed. Viruses of Plants in Australia. Retrieved from http://www.ictvdb.rothamsted.ac.uk/Aussi/aussi.htm . September, 2002. (3) S. K. Choi et al. J. Virol. Methods 83:67, 1999. (4) S. H. Hseu et al. Plant Prot. Bull. (Taiwan) 29:233, 1987.
Published: 2019

30. The National Institute for Health Research Hyperacute Stroke Research Centres and the ENCHANTED trial: the impact of enhanced research infrastructure on trial metrics and patient outcomes

Author: Alice C. Durham, Sine Littlewood, Philip White, Christine Roffe, Craig S. Anderson, J. Y. Liao, John Chalmers, Gary A. Ford, Xia Wang, and Thompson G. Robinson
Subjects: Male, medicine.medical_specialty, thrombolysis, Biomedical Research, medicine.medical_treatment, Health administration, 03 medical and health sciences, 0302 clinical medicine, Fibrinolytic Agents, Interquartile range, Modified Rankin Scale, Medicine, Humans, 030212 general & internal medicine, symptomatic intracerebral haemorrhage, alteplase, Aged, Cerebral Hemorrhage, clinical trials, 030505 public health, business.industry, lcsh:Public aspects of medicine, Health Policy, Public health, Research, Health services research, Academies and Institutes, lcsh:RA1-1270, Thrombosis, Thrombolysis, Middle Aged, R1, United Kingdom, Clinical trial, Stroke, Clinical research, Treatment Outcome, England, Tissue Plasminogen Activator, Acute ischaemic stroke, Acute Disease, Hypertension, Physical therapy, Female, 0305 other medical science, business
Abstract: Background The English National Institute for Health Research Clinical Research Network first established Hyperacute Stroke Research Centres (HSRCs) in 2010 to support multicentre hyperacute (
Published: 2019

31. Insight-HXMT Observations of a Possible Fast Transition from the Jet- to Wind-dominated State during a Huge Flare of GRS 1915+105

Author: R. J. Yang, Qiu-Yi Luo, L. Chen, H. S. Zhao, Y. L. Tuo, J. Y. Liao, H. M. Zhang, Y. Nang, Lei Sun, C. Z. Liu, Lian Tao, D. K. Zhou, R. C. Ma, Y. F. Zhang, Yuan You, Y. H. Zhang, X. Y. Song, X. H. Ma, Yuan-Yuan Du, Qi-Bin Yi, B. Y. Wu, P. J. Wang, Tao Luo, Bo Liu, B. B. Wu, Xuelong Li, J. Guan, Li-Ming Song, S. Xiao, Bo Li, Shaolin Xiong, X. X. Li, Xue-Feng Lu, H. Gao, G. H. Gao, Tong Li, S. M. Jia, Y. P. Xu, Sisi Yang, S. J. Zheng, F. J. Lu, M. Wu, Jia Huo, XiangYang Wen, Y. H. Tan, Ya Fang Huang, Peng Zhang, Qingcui Bu, Y. G. Zheng, H. W. Liu, Y. J. Yang, X. L. Cao, Gang Li, W. S. Wang, Tian-Xiang Chen, N. Sai, Cunguo Wang, C. K. Li, Ge Ou, W. C. Zhang, S. N. Zhang, Y. B. Chen, Junqiang Zhang, Q. Q. Yin, Z. W. Li, Y. P. Chen, G. C. Xiao, J. Jin, Xin-Fu Zhao, X. J. Liu, Y. S. Wang, Wenhan Jiang, Ling-Jun Wang, C. Cai, Wenxiong Li, Gang Chen, Z. Chang, Da-Wei Han, L. D. Kong, Xiong Li, Yu-Dong Gu, Bin Meng, Min Gao, Ming-Yu Ge, X. H. Liang, J. L. Qu, Hongfei Liu, Fuqin Zhang, Long Ji, X. Q. Ren, Wei Cui, J. Y. Nie, Wei Zhang, and Cheng-Cheng Guo
Subjects: 010504 meteorology & atmospheric sciences, Astrophysics::High Energy Astrophysical Phenomena, X-ray binary, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Spectral line, Luminosity, law.invention, Astrophysical jet, law, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Accretion (meteorology), Astronomy and Astrophysics, Radius, Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing), Flare
Abstract: We present the analysis of the brightest flare that was recorded in the \emph{Insight}-HMXT data set, in a broad energy range (2$-$200 keV) from the microquasar GRS~1915+105 during an unusual low-luminosity state. This flare was detected by \emph{Insight}-HXMT among a series of flares during 2 June 2019 UTC 16:37:06 to 20:11:36, with a 2-200 keV luminosity of 3.4$-$7.27$\times10^{38}$ erg s$^{-1}$. Basing on the broad-band spectral analysis, we find that the flare spectrum shows different behaviors during bright and faint epochs. The spectrum of the flare can be fitted with a model dominated by a power-law component. Additional components show up in the bright epoch with a hard tail and in the faint epoch with an absorption line $\sim$ 6.78 keV. The reflection component of the latter is consistent with an inner disk radius $\sim$ 5 times larger than that of the former. These results on the giant flare during the "unusual" low-luminosity state of GRS~1915+105 may suggest that the source experiences a possible fast transition from a jet-dominated state to a wind-dominated state. We speculate that the evolving accretion disk and the large-scale magnetic field may play important roles in this peculiar huge flare.
Published: 2021
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32. Two Complete Spectral Transitions of Swift J0243.6+6124 Observed by Insight-HXMT

Author: L. D. Kong, S. Zhang, Y. P. Chen, S. N. Zhang, L. Ji, V. Doroshenko, P. J. Wang, L. Tao, M. Y. Ge, C. Z. Liu, L. M. Song, F. J. Lu, J. L. Qu, T. P. Li, Y. P. Xu, X. L. Cao, Y. Chen, Q. C. Bu, C. Cai, Z. Chang, G. Chen, L. Chen, T. X. Chen, Y. B. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, Y. Huang, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, B. Li, C. K. Li, G. Li, M. S. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. W. Li, X. H. Liang, J. Y. Liao, B. S. Liu, G. Q. Liu, H. W. Liu, X. J. Liu, Y. N. Liu, B. Lu, X. F. Lu, Q. Luo, T. Luo, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, N. Sai, R. C. Shang, X. Y. Song, L. Sun, Y. Tan, Y. L. Tuo, C. Wang, G. F. Wang, J. Wang, L. J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, B. Y. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, H. Xu, J. W. Yang, S. Yang, Y. J. Yang, Q. B. Yi, Q. Q. Yin, Y. You, A. M. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, T. Zhang, W. C. Zhang, W. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, X. F. Zhao, S. J. Zheng, Y. G. Zheng, D. K. Zhou, J. F. Zhou, Y. X. Zhu, and R. L. Zhuang
Subjects: Physics, Swift, X-ray astronomy, Space and Planetary Science, X-ray binary, Astronomy and Astrophysics, Astrophysics, computer, Spectral line, Luminosity, computer.programming_language
Published: 2020
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33. Insight-HXMT observations of the New Black Hole Candidate MAXI J1535-571: timing analysis

Author: Wei Zhang, Yi-Qiao Dong, Cheng-Cheng Guo, X. L. Cao, Fu-Guo Xie, Xian Hou, Yupeng Xu, Jiancheng Wang, Xian Li, Jundan Nie, Y. G. Li, Yunchao Liu, Z. Chang, Yujuan Liu, C. L. Zou, Luhua Jiang, Y. J. Yang, W. C. Jiang, C. Z. Liu, Wei Cui, Mao-Shun Li, J. K. Deng, J. F. Zhou, Tianmeng Zhang, B. B. Wu, Jia Huo, X. H. Ma, Ju Guan, J. F. Ji, Xiaobo Li, ShaoZhen Liu, Tianran Chen, Shan-Shan Weng, Gang Chen, Yu-Dong Gu, Lian Tao, Y. X. Zhu, Li-Ming Song, Ming-Yu Ge, Xiao-Jing Liu, Bing Li, Guobao Zhang, Xue-Feng Lu, H. W. Liu, Shuinai Zhang, W. Z. Zhang, Yuan-Yuan Du, Z. L. Zhang, Y. S. Wang, Wenxiong Li, GuoQing Liu, Y. H. Tan, L. Chen, Wenfei Yu, Hsiang-Kuang Chang, S. N. Zhang, Chuan-Peng Zhang, Ya Fang Huang, Y. Nang, C. L. Zhang, Limei Yan, S. Yang, G. H. Gao, Wan-Chang Zhang, Y. P. Chen, Can Güngör, Y. B. Chen, Ti-Pei Li, M. Wu, Y. Zhang, G. F. Wang, Y. L. Tuo, J. Y. Liao, H. M. Zhang, J. W. Yang, Y. F. Zhang, Bo Lu, Xuchao Zhao, M. X. Fu, Jia Zhang, C. K. Li, H. Wang, Wei Hu, Z. Zhang, X. X. Li, Weiguang Cui, Qing-He Zhang, Zhuo Li, Qingcui Bu, Shu-Mei Jia, W. S. Wang, Shaolin Xiong, HongSheng Zhao, H. Xu, Ge Ou, Y. J. Zhang, Z. W. Li, Da-Wei Han, H. Gao, S. J. Zheng, Tao Luo, X. H. Liang, Min Gao, J. Zhao, J. L. Qu, Liang Sun, Albert K. H. Kong, Aimei Zhang, Gang Li, N. Sai, Yu-Xuan Zhu, Bin Meng, Fangjun Lu, Y. J. Jin, J. Jin, R. C. Shang, WenHui Tao, G. C. Xiao, F. Zhang, and XiangYang Wen
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Static timing analysis, Centroid, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Phase lag, law.invention, Black hole, Telescope, Amplitude, Space and Planetary Science, law, 0103 physical sciences, Modulation (music), Intermediate state, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics
Abstract: We present the X-ray timing results of the new black hole candidate (BHC) MAXI J1535-571 during its 2017 outburst from Hard X-ray Modulation Telescope (\emph{Insight}-HXMT) observations taken from 2017 September 6 to 23. Following the definitions given by \citet{Belloni2010}, we find that the source exhibits state transitions from Low/Hard state (LHS) to Hard Intermediate state (HIMS) and eventually to Soft Intermediate state (SIMS). Quasi-periodic oscillations (QPOs) are found in the intermediate states, which suggest different types of QPOs. With the large effective area of \emph{Insight}-HXMT at high energies, we are able to present the energy dependence of the QPO amplitude and centroid frequency up to 100 keV which is rarely explored by previous satellites. We also find that the phase lag at the type-C QPOs centroid frequency is negative (soft lags) and strongly correlated with the centroid frequency. By assuming a geometrical origin of type-C QPOs, the source is consistent with being a high inclination system., Comment: 12 pages, 11 figures, Sumbitted to ApJ
Published: 2018
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34. Study on the distribution of CD8+ memory T cell subsets and IFN-γ level during the spontaneous clearance of hepatitis B virus in patients with chronic hepatitis B virus infection

Author: X-J, Ma, X-F, Chen, W-L, Chen, R, Chen, J, Huang, X-D, Luo, J-Y, Liao, and X-P, Chen
Subjects: Adult, Male, Hepatitis B virus, Hepatitis B Surface Antigens, Enzyme-Linked Immunosorbent Assay, CD8-Positive T-Lymphocytes, Middle Aged, Flow Cytometry, Interferon-gamma, Young Adult, Hepatitis B, Chronic, Seroconversion, T-Lymphocyte Subsets, Humans, Female, Hepatitis B e Antigens
Abstract: To study the alteration of CD8+ memory T cell subsets under different immune statuses during the spontaneous clearance of hepatitis B virus (HBV) in Chinese patients with chronic HBV infection.We analyzed Chinese patients with chronic HBV infection including 10 patients with Hepatitis B surface Antigen (HBsAg) spontaneous seroconversion, 25 patients with Hepatitis B virus e Antigen (HBeAg) spontaneous seroconversion, 25 patients with chronic hepatitis B (CHB), and 25 chronic HBV carriers. The CD8+ T cells in peripheral blood were isolated, and flow cytometry was used to determine the percent change of CD8+ T memory cell subsets. ELISA was used to measure the levels of Interferon-γ (IFN-γ) secretion from CD8+ T cells.(1) The percentage of CD8+ TN cells in peripheral blood was lower in the HBsAg seroconversion group than in the HBeAg seroconversion group (p0.01), and higher in the CHB group and chronic HBV carrier group (p0.01, 0.01); (2) The percentage of CD8+ TEM-2 memory T cells in peripheral blood was higher in the HBsAg seroconversion group than the HBeAg seroconversion group (p0.05), CHB group, and chronic HBV carrier group (p0.01, 0.01); (3) The percentage of CD8+ TEM-1 and CD8+ TCM cells in peripheral blood was higher in the CHB group and HBV carrier group than the HBsAg seroconversion group and HBeAg group, but there were no significant differences between groups (p0.05); (4) IFN-γ production from CD8+ T cells in peripheral blood was higher in the HBsAg seroconversion group than the HBeAg seroconversion group (p0.05), CHB group, and chronic HBV carrier group (p0.05, 0.01).The consistent increase of CD8+ TEM-2 cell subsets may be an important cause of spontaneous clearance of HBV. The disorder of CD8+ memory T cell differentiation may be an important mechanism of chronic HBV infection.
Published: 2017

35. [Efficacy and safety of oseltamivir in children with suspected influenza: a multicenter randomized open-label trial]

Author: C H, He, C Y, Liu, G Y, Lin, Q, Peng, J Y, Liao, J H, Lin, T, Zhang, X F, Zheng, C X, Lin, S J, Wang, R S, Chen, L, Deng, and Y M, Chen
Subjects: Diarrhea, Male, Fever, Vomiting, Hospitals, Pediatric, Antiviral Agents, Drug Administration Schedule, Abdominal Pain, Oseltamivir, Treatment Outcome, Influenza, Human, Humans, Female, Child
Published: 2017

36. Insight-HXMT observations of the first binary neutron star merger GW170817

Author: Xufang Li, C. L. Zou, Yongjie Zhang, Yifei Zhang, Lian Tao, N. Sai, Ti-Pei Li, Shuang-Nan Zhang, Bin Meng, Aimei Zhang, Tong Zhang, Ming-Yu Ge, Xiao-Jing Liu, Yupeng Xu, Yuan Liu, Jing Jin, J. W. Yang, ShaoZhen Liu, Guan-Hua Gao, Xian Li, Sheng Yang, X. L. Cao, G. C. Xiao, Yong Chen, LinLi Yan, Shu-Mei Jia, Y. Tan, XiangYang Wen, W. C. Jiang, Yu-Dong Gu, Zheng-Wei Li, LuHua Jiang, L. Chen, M. X. Fu, W. S. Wang, Huanyu Wang, Wei-Wei Cui, Jianling Zhao, Yue Zhang, Yanji Yang, Juan Zhang, Yu-Xuan Zhu, Mao-Shun Li, Tian-Xiang Chen, Shaolin Xiong, Ju Guan, Jianyin Nie, Ge Ou, Wei Li, Cheng-Cheng Guo, Liang Sun, Bing Li, Wei Cui, Cheng-Kui Li, Yu-Peng Chen, Fan Zhang, H. Gao, Jin-Lu Qu, Yi Zhang, Yuan-Yuan Du, Wei Hu, Xiao-Fan Zhao, Yongwei Dong, Yue Huang, Gang Chen, X. H. Liang, Yue Zhu, Fangjun Lu, WenHui Tao, Hai-Sheng Zhao, He Xu, Juan Wang, H. T. Liu, Y. B. Chen, Youli Tuo, T. Luo, Jia Huo, W. Z. Zhang, ZiJian Li, Zhao Zhang, Gang Li, Yu-Sa Wang, Mei Wu, Shu Zhang, J. Y. Liao, Wei Zhang, Bo Lu, Y. N. Liu, Zi-Liang Zhang, Zhi Chang, GuoQing Liu, Da-Wei Han, HongMei Zhang, YongJie Jin, Y. Nang, ChunLei Zhang, G. F. Wang, Xiang Ma, Yanguo Li, Li-Ming Song, Xue-Feng Lu, M. Gao, Shi-Jie Zheng, Qiang Zhang, Bobing Wu, C. L. Zhang, C. X. Liu, J. K. Deng, Wan-Chang Zhang, and Xiaobo Li
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, FOS: Physical sciences, Context (language use), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Compact star, 01 natural sciences, LIGO, law.invention, Telescope, Neutron star, law, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, Gamma-ray burst, 010303 astronomy & astrophysics, Fermi Gamma-ray Space Telescope
Abstract: Finding the electromagnetic (EM) counterpart of binary compact star merger, especially the binary neutron star (BNS) merger, is critically important for gravitational wave (GW) astronomy, cosmology and fundamental physics. On Aug. 17, 2017, Advanced LIGO and \textit{Fermi}/GBM independently triggered the first BNS merger, GW170817, and its high energy EM counterpart, GRB 170817A, respectively, resulting in a global observation campaign covering gamma-ray, X-ray, UV, optical, IR, radio as well as neutrinos. The High Energy X-ray telescope (HE) onboard \textit{Insight}-HXMT (Hard X-ray Modulation Telescope) is the unique high-energy gamma-ray telescope that monitored the entire GW localization area and especially the optical counterpart (SSS17a/AT2017gfo) with very large collection area ($\sim$1000 cm$^2$) and microsecond time resolution in 0.2-5 MeV. In addition, \textit{Insight}-HXMT quickly implemented a Target of Opportunity (ToO) observation to scan the GW localization area for potential X-ray emission from the GW source. Although it did not detect any significant high energy (0.2-5 MeV) radiation from GW170817, its observation helped to confirm the unexpected weak and soft nature of GRB 170817A. Meanwhile, \textit{Insight}-HXMT/HE provides one of the most stringent constraints (~10$^{-7}$ to 10$^{-6}$ erg/cm$^2$/s) for both GRB170817A and any other possible precursor or extended emissions in 0.2-5 MeV, which help us to better understand the properties of EM radiation from this BNS merger. Therefore the observation of \textit{Insight}-HXMT constitutes an important chapter in the full context of multi-wavelength and multi-messenger observation of this historical GW event., Comment: accepted by Science China - Physics, Mechanics & Astronomy. Planned to publish on Oct 17, but postponed due to a problem on pdf file
Published: 2017
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37. In-orbit Demonstration of X-Ray Pulsar Navigation with the Insight-HXMT Satellite

Author: S. J. Zheng, S. N. Zhang, F. J. Lu, W. B. Wang, Y. Gao, T. P. Li, L. M. Song, M. Y. Ge, D. W. Han, Y. Chen, Y. P. Xu, X. L. Cao, C. Z. Liu, S. Zhang, J. L. Qu, Z. Chang, G. Chen, L. Chen, T. X. Chen, Y. B. Chen, Y. P. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, Y. D. Gu, J. Guan, C. Gungor, C. C. Guo, W. Hu, Y. Huang, J. Huo, J. F. Ji, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, B. Li, C. K. Li, G. Li, M. S. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. J. Li, Z. W. Li, X. H. Liang, J. Y. Liao, G. Q. Liu, H. W. Liu, S. Z. Liu, X. J. Liu, Y. Liu, Y. N. Liu, B. Lu, X. F. Lu, T. Luo, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G Ou, N. Sai, R. C. Shang, L. Sun, Y. Tan, L. Tao, W. Tao, Y. L. Tuo, G. F. Wang, J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, M. Wu, G. C. Xiao, S. L. Xiong, H. Xu, L. L. Yan, J. W. Yang, S. Yang, Y. J. Yang, A. M. Zhang, C. L. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, Q. Zhang, T. Zhang, W. Zhang, W. C. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, J. L. Zhao, X. F. Zhao, Y. Zhu, Y. X. Zhu, and C. L. Zou
Subjects: Physics, High energy, Crab Pulsar, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, 01 natural sciences, law.invention, Telescope, Pulsar, Space and Planetary Science, law, 0103 physical sciences, Satellite, Astrophysics::Earth and Planetary Astrophysics, Orbit (control theory), Astrophysics - Instrumentation and Methods for Astrophysics, 010306 general physics, Observation data, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, X-ray pulsar
Abstract: In this work, we report the in-orbit demonstration of X-ray pulsar navigation with Insight-Hard X-ray Modulation Telescope (Insight-HXMT), which was launched on Jun. 15th, 2017. The new pulsar navigation method 'Significance Enhancement of Pulse-profile with Orbit-dynamics' (SEPO) is adopted to determine the orbit with observations of only one pulsar. In this test, the Crab pulsar is chosen and observed by Insight-HXMT from Aug. 31th to Sept. 5th in 2017. Using the 5-day-long observation data, the orbit of Insight-HXMT is determined successfully with the three telescopes onboard - High Energy X-ray Telescope (HE), Medium Energy X-ray Telescope (ME) and Low Energy X-ray Telescope (LE) - respectively. Combining all the data, the position and velocity of the Insight-HXMT are pinpointed to within 10 km (3 sigma) and 10 m/s (3 sigma), respectively., Accepted by the Astrophysical Journal Supplement
Published: 2019
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38. Dynamics and cutting stability of the dynamically loaded worktable subjected to simply supported conditions

Author: Kuo-Chiang Cha, J. Y. Liao, and Nenzi Wang
Subjects: Timoshenko beam theory, Engineering, business.product_category, State-space representation, business.industry, Mechanical Engineering, Base (geometry), Stiffness, Structural engineering, Industrial and Manufacturing Engineering, Computer Science Applications, Machine tool, Grinding, Control and Systems Engineering, Stability theory, medicine, Time domain, medicine.symptom, business, Software
Abstract: This paper aims to explore the dynamic characteristics and cutting stability of a surface grinder. In simulated grinding, the dynamically loaded worktable is described by the Euler–Bernoulli beam theory. In the model, the elastic worktable has both ends simply supported on a movable and massless rigid base. The analysis of the dynamics and stability of the worktable is complex due to the operating worktable being dynamically loaded in variable positions. With the Lagrange energy method combined with the assumed mode expansion method, the system dynamic equations are derived and a state space model for the dynamically loaded worktable subjected to simply supported conditions is developed. In this study, the maximum negative real part of the overall dynamic compliance and the limiting depth of cut are used as indicators to assess the structural static and dynamic performance of the worktable in various positions. The effects of worktable damping, contact stiffness, and damping between the tool and the workpiece on the system performance are studied. Based on the regenerative chatter and stability theory, the 3D stability lobes diagram is analyzed to optimize the maximum depth of cut at the highest available spindle speed. The cutting stability is verified by comparing the results obtained in the time domain analysis with the stability lobe diagram. The procedure illustrated in this study to improve the dynamics performance of a surface grinder can also be implemented in a similar fashion for many machine tool applications.
Published: 2013
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39. AN S-MATRIX ANALYSIS OF THE Z-RESONANCE

Author: D. McNally, R. Fabbretti, Stefan Kirsch, G. Viertel, F. J. Rodriguez, H. R. Gustafson, H. El Mamouni, S. Morganti, G. M. Bilei, D. Antreasyan, Andrea Contin, I. Bechtluft, F. Cesaroni, Luca Lista, J. Schwenke, S. Easo, An.A. Vorobyov, D. Fernandez, X. Y. Cui, M. Gruenewald, Qi An, P. Arce, V. Plyaskin, J. Y. Liao, S. Patricelli, L. Martinez-Laso, D. Goujon, J. M. Ma, Yanwen Liu, Q. Ye, P. Kapinos, O. Adriani, Egidio Longo, A. Kasser, Lucas Taylor, F. C. Erné, Roberto Castello, P. Duinker, C. Warner, A. Atamanchuk, C. Dionisi, Pablo Garcia-Abia, Alain Hervé, Emilio Leonardi, Simonetta Gentile, Sabine Riemann, Vincenzo Innocente, L. Fredj, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Ph Fisher, H. Rykaczewski, Guofan Hu, Giovanni Organtini, K. N. Qureshi, S. Goldfarb, A. Klimentov, P. Schmitz, P. Vikas, G. Tsipolitis, Georgi Sultanov, T. S. Dai, R. A. Khan, V. R. Krastev, M. T. Dova, V. P. Andreev, O. Rind, M. Chemarin, R. Bock, G. M. Chen, A. Sopczak, U. K. Chaturvedi, Maurizio Biasini, A. Bay, Samuel C.C. Ting, Marta Felcini, M. Bosetti, T. E. Coan, J. G. Branson, Kenneth Francis Read, L. Djambazov, Y. Karyotakis, K. Freudenreich, L. Z. Sun, Y. S. Lu, H. O. Cohn, M. M. Ilyas, A. Gougas, D. Hauschildt, Davide Piccolo, Lamberto Luminari, M. Vivargent, M. Sachwitz, Francesco Becattini, X. R. Shi, Z. W. Yin, Felicitas Pauss, K. Sudhakar, G. Passaleva, Carlo Civinini, M. Maolinbay, G. Raven, M. Aguilar-Benitez, M. S. Sarakinos, L. J. Gutay, A. Degré, S. Chung, P.V.K.S. Baba, Attilio Santocchia, Jean Fay, M. Dhina, F. Cotorobai, X. T. Cui, S. Rosier-Lees, P. Le Coultre, K. Hangarter, J. K. Kim, R. Starosta, D. Luckey, Gy L. Bencze, Y. J. Pei, Reinhard W. Schulte, Konrad Deiters, Raffaello D'Alessandro, M. Möller, N. Zaitsev, U. Becker, D. Gele, Jianming Qian, T. Angelescu, G. Hu, H. Anderhub, A. Krivshich, J. B. Ye, I. Duran, L. Romero, C. Maña, I. C. Brock, Herwig Schopper, M. Rattaggi, H. Postema, M. White, J. H. Field, C. Y. Chien, C. Leggett, Z. Y. Lin, Alberto Aloisio, A. Ricker, H. Kuijten, R. Barillère, S. N. Ganguli, E. Gonzalez, Steven Ahlen, Leonardo Merola, Yu. Kamyshkov, J. Mnich, A. Kirkby, Carlos Willmott, F. J. Eppling, G. J. Zhou, L. W. Jones, D. S. Yan, S. M. Ting, Speranza Falciano, G. B. Mills, A. Lebedev, Dong-Chul Son, T. Kramer, K. Mazumdar, J. J. Blaising, H. F. Chen, M. Guanziroli, F. Ferroni, Marcella Diemoz, E. Dénes, R. Sehgal, A. Buytenhuijs, Giovanni Ambrosi, M. N. Kienzle-Focacci, M. MacDermott, R. Rosmalen, Stefano Giagu, H. T. Li, R. Leiste, Christoph Paus, T. Azemoon, A. Rubbia, X. W. Tang, S. X. Wu, C. G. Yang, W. Friebel, P. Zemp, K. S. Kumar, J. G. Xu, M. Fukushima, R. de Asmundis, Wt Lin, B. L. Betev, Y. Zeng, J. P. Martin, A. Tsaregorodtsev, Bolek Wyslouch, S. Wynhoff, A. Nippe, D. Duchesneau, M. Wadhwa, S. C. Tonwar, K. Y. Lee, Frank Filthaut, B. P. Roe, C. Wang, Thomas Ferguson, D. Z. Shen, Chenjie Gu, C. F. He, Alexander Malinin, B. Monteleoni, I. Sheer, P. A. Piroué, B. Zhou, Elisabetta Gallo, P. Marchesini, D. DiBitonto, Ph. Rosselet, M. Steuer, G. Forconi, Yuehong Xie, G. Chiefari, S. Shevchenko, M. A. Niaz, A. Bujak, Oliver Kornadt, M. Pohl, Mariagrazia Alviggi, B. C.C. van der Zwaan, C. Neyer, I. Vetlitsky, W. van Rossum, P. G. Rancoita, Pierluigi Paolucci, M. Gailloud, R. C. Ball, G. Sartorelli, X. L. Wang, F. Behner, T. Paul, Marcos Cerrada, Y. Mi, J. A. Bakken, Y. F. Wang, M. Sassowsky, J. Bao, E. Shumilov, V. Shoutko, B. C. Riemers, Axel König, F. Sticozzi, B. N. Jin, J. Weber, W. Y. Chen, Ren-Yuan Zhu, Luciano Barone, W. Kittel, T. J. Wenaus, Werner Lustermann, A. Pevsner, M. Lenti, Stefan Roth, A. Nadtochy, C. Spartiotis, J. M. Le Goff, M. Bourquin, K. Strauch, Andrea Baschirotto, Adrian Biland, Chenliang Wang, D. H. Wright, Ming Zeng, N. Gheordanescu, Z. M. Wang, A. A. Syed, P. Extermann, P. Lecomte, H. Nowak, I. Leedom, B. Z. Yang, M. Caria, M. Tonutti, Yu. Galaktionov, G. Schwering, M. Rescigno, D. Perret-Gallix, G. Terzi, G. S. Sanders, S. J. Fan, A. M. Cartacci, R. Raghavan, Laurent Vuilleumier, M. Röhner, P. G. Seiler, G. Fernandex, S. Reucroft, F. Wittgenstein, S. Shotkin, L. Ludovici, E. Drago, B.C. Stringfellow, H. Hofer, K. L. Tung, J. A. Rubio, F. Plasil, Mingshui Chen, A. Koulbardis, J. Alcaraz, J. S. Lee, G. F. Susinno, A. Arefiev, M. Yzerman, A. Gurtu, Els Koffeman, M. Fabre, M. Schneegans, D. M. Lee, Dimitri Bourilkov, L. Antonov, R. Morand, Z. L. Xue, W. Wallraff, H. A. Rizvi, N. Yunus, G. Carlino, A. Marin, A. Kunin, M. Pauluzzi, Jun Guo, H. R. Dimitrov, O. Fackler, H. J. Schreiber, S. Banerjee, A. Engler, V. Koutsenko, J. M. Salicio, N. E. Moulai, Hafeez R Hoorani, E. Fiandrini, Zp Zhang, Helmut Vogel, Howard A. Stone, V. K. Gupta, B. Lindemann, L. Urbán, M. Capell, D. Boutigny, J. C. Sens, R. T. Van de Walle, Y. G. Kim, G. Finocchiaro, V. Pojidaec, R. Mount, Marcel Merk, A. C. Weber, G. Gratta, M. T. Choi, Cheng Chen, A. Mihul, E. Brambilla, B. Hartmann, Tariq Aziz, A. Hasan, D. Ren, H. S. Fesefeldt, W. J. Metzger, S. Ro, R. Bizzarri, F. DeNotaristefani, Roberto Battiston, K. Riles, J. Perrier, Z. Z. Xu, J. Wenninger, F. Marzano, Y. H. Chang, I. Scott, George Alverson, Francesca Nessi-Tedaldi, J. S. Kapustinsky, R. Malik, J. D. Burger, W. J. Burger, J. Shukla, C. Zaccardelli, G. Coignet, W. Krenz, U. Vikas, Peter Denes, G. Sauvage, Z. D. Qi, J. T. He, Gerjan Bobbink, B. Borgia, S. Khokhar, T.R. McMahon, S. Müller, F. L. Linde, R. Weill, G. Rahal-Callot, Z. F. Gong, J. M. Lubbers, W. W. Kinnison, S. C. Yeh, J. Behrens, P. J. Li, Paolo Bagnaia, J. Ulbricht, David Stickland, P. Berges, Marco Meschini, Crisostomo Sciacca, P. Lebrun, R. Klöckner, D. Kirkby, Harvey B Newman, K. Hilgers, Xd Cai, Zhuoxiang Ren, E. Nagy, R. Becker, A. L. Anderson, D. J. Schotanus, J. M. You, Marco Pieri, K. Schultze, H. Suter, BT Bouwens, F. Marion, G. A. Yang, Igor Vorobiev, G. Mirabelli, D. Lanske, M. Hebert, Christopher George Tully, Guo-Ming Chen, Panos A Razis, V. Soulimov, J. F. Zhou, I. Clare, J. Busenitz, Wolfgang Lohmann, H. Vogt, U. Uwer, A. Chen, B. Bertucci, S. C. Kim, J. Salicio, Nicanor Colino, S. Schulte, K. Lübelsmeyer, Piero Spillantini, J. Tóth, Y. Mir, C. H. Ye, D. Pandoulas, T. Spickermann, Michael Dittmar, Bernard Ille, K. Janssen, Stéphane Jézéquel, J. D. Swain, P. McBride, A. Böhm, J. Berdugo, S. Lanzano, D.W. Schmitz, G. Pascale, G.G.G. Massaro, Claudio Luci, Robert Clare, W. G. Ma, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Napolitano, I. Josa-Mutuberria, H. S. Chen, L. Servoli, Shu Li, G. Landi, M. L. Brooks, Simone Paoletti, Manjit Kaur, Daqiang Zhang, E. Valente, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. L., Andreev, V. P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., P. V. K., Bagnaia, P., Bakken, J. A., Ball, R. C., Banerjee, S., Bao, J., Barillere, R., Barone, L., Baschirotto, A., Battiston, R., Bay, A., Becattini, F., Bechtluft, J., Becker, R., Becker, U., Behner, F., Behrens, J., Bencze, G. L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Biasini, M., Biland, A., Bilei, G. M., Bizzarri, R., Blaising, J. J., Bobbink, G. J., Bock, R., Bohm, A., Borgia, B., Bosetti, M., Bourilkov, D., Bourquin, M., Boutigny, D., Bouwens, B., Brambilla, E., Branson, J. G., Brock, I. C., Brooks, M., Bujak, A., Burger, J. D., Burger, W. J., Busenitz, J., Buytenhuijs, A., Cai, X. D., Capell, M., Caria, M., Carlino, G., Cartacci, A. M., Castello, R., Cerrada, M., Cesaroni, F., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, C., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chen, M., Chen, W. Y., Chiefari, Giovanni, Chien, C. Y., Choi, M. T., Chung, S., Civinini, C., Clare, I., Clare, R., Coan, T. E., Cohn, H. O., Coignet, G., Colino, N., Contin, A., Cotorobai, F., Cui, X. T., Cui, X. Y., Dai, T. S., Dalessandro, R., Deasmundis, R., Degre, A., Deiters, K., Denes, E., Denes, P., Denotaristefani, F., Dhina, M., Dibitonto, D., Diemoz, M., Dimitrov, H. R., Dionisi, C., Dittmar, M., Djambazov, L., Dova, M. T., Drago, E., Duchesneau, D., Duinker, P., Duran, I., Easo, S., Elmamouni, H., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabbretti, R., Fabre, M., Falciano, S., Fan, S. J., Fackler, O., Fay, J., Felcini, M., Ferguson, T., Fernandez, D., Fernandez, G., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Finocchiaro, G., Fisher, P. H., Forconi, G., Fredj, L., Freudenreich, K., Friebel, W., Fukushima, M., Gailloud, M., Galaktionov, Y., Gallo, E., Ganguli, S. N., Garciaabia, P., Gele, D., Gentile, S., Gheordanescu, N., Giagu, S., Goldfarb, S., Gong, Z. F., Gonzalez, E., Gougas, A., Goujon, D., Gratta, G., Gruenewald, M., Gu, C., Guanziroli, M., Guo, J. K., Gupta, V. K., Gurtu, A., Gustafson, H. R., Gutay, L. J., Hangarter, K., Hartmann, B., Hasan, A., Hauschildt, D., C. F., He, J. T., He, Hebbeker, T., Hebert, M., Herve, A., Hilgers, K., Hofer, H., Hoorani, H., Hu, G., G. Q., Hu, Ille, B., Ilyas, M. M., Innocente, V., Janssen, H., Jezequel, S., Jin, B. N., Jones, L. W., Josamutuberria, I., Kasser, A., Khan, R. A., Kamyshkov, Y., Kapinos, P., Kapustinsky, J. S., Karyotakis, Y., Kaur, M., Khokhar, S., Kienzlefocacci, M. N., Kim, J. K., Kim, S. C., Kim, Y. G., Kinnison, W. W., Kirkby, A., Kirkby, D., Kirsch, S., Kittel, W., Klimentov, A., Klockner, R., Konig, A. C., Koffeman, E., Kornadt, O., Koutsenko, V., Koulbardis, A., Kraemer, R. W., Kramer, T., Krastev, V. R., Krenz, W., Krivshich, A., Kuijten, H., Kumar, K. S., Kunin, A., Landi, G., Lanske, D., Lanzano, S., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Lecoultre, P., Lee, D. M., Lee, J. S., Lee, K. Y., Leedom, I., Leggett, C., Legoff, J. M., Leiste, R., Lenti, M., Leonardi, E., Li, C., H. T., Li, P. J., Li, Liao, J. Y., Lin, W. T., Lin, Z. Y., Linde, F. L., Lindemann, B., Lista, L., Liu, Y., Lohmann, W., Longo, E., Y. S., Lu, Lubbers, J. M., Lubelsmeyer, K., Luci, C., Luckey, D., Ludovici, L., Luminari, L., Lustermann, W., J. M., Ma, W. G., Ma, Macdermott, M., Malik, R., Malinin, A., Mana, C., Maolinbay, M., Marchesini, P., Marion, F., Marin, A., Martin, J. P., Martinezlaso, L., Marzano, F., G. G. G., Mazumdar, K., Mcbride, P., Mcmahon, T., Mcnally, D., Merk, M., Merola, Leonardo, Meschini, M., Metzger, W. J., Mi, Y., Mihul, A., Mills, G. B., Mir, Y., Mirabelli, G., Mnich, J., Moller, M., Monteleoni, B., Morand, R., Morganti, S., Moulai, N. E., Mount, R., Muller, S., Nadtochy, A., Nagy, E., Napolitano, Marco, Nessitedaldi, F., Newman, H., Neyer, C., Niaz, M. A., Nippe, A., Nowak, H., Organtini, G., Pandoulas, D., Paoletti, S., Paolucci, P., Pascale, G., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pei, Y. J., Pensotti, S., Perretgallix, D., Perrier, J., Pevsner, A., Piccolo, D., Pieri, M., Piroue, P. A., Plasil, F., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Z. D., Qi, Qian, J. M., Qureshi, K. N., Raghavan, R., Rahalcallot, G., Rancoita, P. G., Rattaggi, M., Raven, G., Razis, P., Read, K., Ren, D., Ren, Z., Rescigno, M., Reucroft, S., Ricker, A., Riemann, S., Riemers, B. C., Riles, K., Rind, O., Rizvi, H. A., Ro, S., Rodriguez, F. J., Roe, B. P., Rohner, M., Romero, L., Rosierlees, S., Rosmalen, R., Rosselet, P., Vanrossum, W., Roth, S., Rubbia, A., Rubio, J. A., Rykaczewski, H., Sachwitz, M., Salicio, J., Salicio, J. M., Sanders, G. S., Santocchia, A., Sarakinos, M. S., Sartorelli, G., Sassowsky, M., Sauvage, G., Schegelsky, V., Schmitz, D., Schmitz, P., Schneegans, M., Schopper, H., Schotanus, D. J., Shotkin, S., Schreiber, H. J., Shukla, J., Schulte, R., Schulte, S., Schultze, K., Schwenke, J., Schwering, G., Sciacca, Crisostomo, Scott, I., Sehgal, R., Seiler, P. G., Sens, J. C., Servoli, L., Sheer, I., Shen, D. Z., Shevchenko, S., Shi, X. R., Shumilov, E., Shoutko, V., Son, D., Sopczak, A., Soulimov, V., Spartiotis, C., Spickermann, T., Spillantini, P., Starosta, R., Steuer, M., Stickland, D. P., Sticozzi, F., Stone, H., Strauch, K., Stringfellow, B. C., Sudhakar, K., Sultanov, G., Sun, L. Z., Susinno, G. F., Suter, H., Swain, J. D., Syed, A. A., Tang, X. W., Taylor, L., Terzi, G., S. C. C., Ting, S. M., Tonutti, M., Tonwar, S. C., Toth, J., Tsaregorodtsev, A., Tsipolitis, G., Tully, C., Tung, K. L., Ulbricht, J., Urban, L., Uwer, U., Valente, E., Vandewalle, R. T., Vetlitsky, I., Viertel, G., Vikas, P., Vikas, U., Vivargent, M., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vuilleumier, L., Wadhwa, M., Wallraff, W., Wang, C., Wang, C. R., Wang, X. L., Wang, Y. F., Wang, Z. M., Warner, C., Weber, A., Weber, J., Weill, R., Wenaus, T. J., Wenninger, J., White, M., Willmott, C., Wittgenstein, F., Wright, D., S. X., Wu, Wynhoff, S., Wyslouch, B., Xie, Y. Y., J. G., Xu, Z. Z., Xu, Xue, Z. L., Yan, D. S., Yang, B. Z., Yang, C. G., Yang, G., C. H., Ye, J. B., Ye, Ye, Q., Yeh, S. C., Yin, Z. W., You, J. M., Yunus, N., Yzerman, M., Zaccardelli, C., Zaitsev, N., Zemp, P., Zeng, M., Zeng, Y., Zhang, D. H., Zhang, Z. P., Zhou, B., Zhou, G. J., Zhou, J. F., Zhu, R. Y., Zichichi, A., B. C. C., and IHEF (IoP, FNWI)
Subjects: Z boson, Nuclear and High Energy Physics, Particle physics, E+E ANNIHILATION, FERMION PAIR PRODUCTION, Electron–positron annihilation, QED CORRECTIONS, 01 natural sciences, Nuclear physics, ASYMMETRIES, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, S-matrix, Ansatz, Physics, Annihilation, 010308 nuclear & particles physics, Física, Polarization (waves), Helicity, S matrix, Z-PEAK, Amplitude, Z-LINE-SHAPE, High Energy Physics::Experiment, Particle Physics - Experiment, Lepton
Abstract: The S matrix ansatz is a rigorously model independent approach to describe the cross-sections and asymmetries in e+e- annihilation. Using the cross-sections and asymmetries measured with the L3 detector during the 1990 and 1991 running period, we determine the mass and the width of the Z boson, the contributions of the Z exchange and of the yZ interference. Including the polarization of the t lepton in the analysis, the leptonic helicity amplitudes of the scattering process are determined assuming lepton universality. The results are compared with other model independent ansatzes as realized in ZFITTER. A systematic bias of the Z mass due to the yZ interference term is detected, which leads to an underestimation of the error on mz for model independent determinations., Facultad de Ciencias Exactas
Published: 2016
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40. Stability analysis for the crankshaft grinding machine subjected to a variable-position worktable

Author: Nenzi Wang, J. Y. Liao, and Kuo-Chiang Cha
Subjects: Crankshaft, Optimal design, Engineering, Computer program, business.industry, Mechanical Engineering, Particle swarm optimization, Mechanical engineering, Degrees of freedom (mechanics), Stability (probability), Industrial and Manufacturing Engineering, Computer Science Applications, Grinding, law.invention, Control and Systems Engineering, law, Stability theory, business, Software
Abstract: This paper serves to evaluate the dynamic performance and the cutting stability of the crankshaft grinding machine. The governing equations for the 7 degrees of freedom (DOF) lumped-mass model are formulated by the Lagrange energy method. The absolute value of the maximum negative real part of the overall dynamic compliance (MNRPODC) and the limiting chip width are the main performance indicators used to explore the structure's dynamic characteristics and the cutting stability of the grinding machine in various worktable positions. The effect on system performance of the distance between the mass center of the workpiece and the worktable module in the z direction is also analyzed. Based on the stability theory for regenerative chatter model, a computer program has been developed that utilizes the three-dimensional stability lobe diagrams of the multi-DOF system to automatically identify the stable and chatter zones. Time domain simulation of the cutting conditions is used to verify the stability lobe diagrams. Finally, an optimization analysis utilizing the particle swarm optimization method is carried out to obtain the optimal design variables. The results, in terms of |MNRPODC| or the limiting critical chip width, show improvements by a factor of 6.5 and are superior to that of the prototype machine.
Published: 2012
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41. Insight-HXMT Observations of 4U 1636-536: Corona Cooling Revealed with Single Short Type-I X-Ray Burst

Author: Y. P. Chen, S. Zhang, J. L. Qu, S. N. Zhang, L. Ji, L. D. Kong, X. L. Cao, Z. Chang, G. Chen, L. Chen, T. X. Chen, Y. Chen, Y. B. Chen, W. Cui, W. W. Cui, J. K. Deng, Y. W. Dong, Y. Y. Du, M. X. Fu, G. H. Gao, H. Gao, M. Gao, M. Y. Ge, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, W. Hu, Y. Huang, J. Huo, S. M. Jia, L. H. Jiang, W. C. Jiang, J. Jin, Y. J. Jin, B. Li, C. K. Li, G. Li, M. S. Li, T. P. Li, W. Li, X. Li, X. B. Li, X. F. Li, Y. G. Li, Z. J. Li, Z. W. Li, X. H. Liang, J. Y. Liao, C. Z. Liu, G. Q. Liu, H. W. Liu, S. Z. Liu, X. J. Liu, Y. Liu, Y. N. Liu, B. Lu, F. J. Lu, X. F. Lu, T. Luo, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, N. Sai, L. M. Song, L. Sun, Y. Tan, L. Tao, W. H. Tao, Y. L. Tuo, G. F. Wang, H. Y. Wang, J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. B. Wu, M. Wu, G. C. Xiao, S. L. Xiong, H. Xu, Y. P. Xu, L. L. Yan, J. W. Yang, S. Yang, Y. J. Yang, A. M. Zhang, C. L. Zhang, C. M. Zhang, F. Zhang, H. M. Zhang, J. Zhang, Q. Zhang, T. Zhang, W. Zhang, W. C. Zhang, W. Z. Zhang, Y. Zhang, Y. F. Zhang, Y. J. Zhang, Z. Zhang, Z. L. Zhang, H. S. Zhao, J. L. Zhao, X. F. Zhao, S. J. Zheng, Y. Zhu, Y. X. Zhu, and C. L. Zou
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Broad bandwidth, Stacking, X-ray, FOS: Physical sciences, Astronomy and Astrophysics, Economic shortage, Astrophysics, 01 natural sciences, Corona, law.invention, Space and Planetary Science, law, 0103 physical sciences, Spectral fitting, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, 010303 astronomy & astrophysics, Flare
Abstract: Corona cooling was detected previously from stacking a series of short type-I bursts occurred during the low/had state of atoll outburst. Type-I bursts are hence regarded as sharp probe to our better understanding on the basic property of the corona. The launch of the first Chinese X-ray satellite Insight-HXMT has large detection area at hard X-rays which provide almost unique chance to move further in this research field. We report the first detection of the corona cooling by Insight-HXMT from single short type-I burst showing up during {\bf flare} of 4U 1636-536. This type-I X-ray burst has a duration of $\sim$13 seconds and hard X-ray shortage is detected with significance 6.2~$\sigma$ in 40-70 keV. A cross-correlation analysis between the lightcurves of soft and hard X-ray band, shows that the corona shortage lag the burst emission by 1.6 $\pm$1.2~s. These results are consistent with those derived previously from stacking a large amount of bursts detected by RXTE/PCA within a series of {\bf flares} of 4U 1636-536. Moreover, the broad bandwidth of Insight-HXMT allows as well for the first time to infer the burst influence upon the continuum spectrum via performing the spectral fitting of the burst, which ends up with the finding that hard X-ray shortage appears at around 40 keV in the continuum spectrum. These results suggest that the evolution of the corona along with the outburst{\bf /flare} of NS XRB may be traced via looking into a series of embedded type-I bursts by using Insight-HXMT., Comment: published in 2018, ApJL,864, L30
Published: 2018
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42. Purification of the insecticidal Cry2Ad protein from a Bt-isolated BRC-HZP10 strain and toxin assay to the diamondback moth, Plutella xylostella (L.)

Author: Q Y Wu, Y Q Gao, M S You, J Y Liao, and Y C Zhu
Subjects: Insecticides, Time Factors, Population, Bacillus thuringiensis, Moths, medicine.disease_cause, Hemolysin Proteins, Bacterial Proteins, Cations, Toxicity Tests, Genetics, medicine, Bioassay, Animals, Food science, education, Molecular Biology, Polyacrylamide gel electrophoresis, Gel electrophoresis, education.field_of_study, Diamondback moth, biology, Bacillus thuringiensis Toxins, Toxin, Chemistry, Plutella, Serum Albumin, Bovine, General Medicine, Reference Standards, biology.organism_classification, Chromatography, Ion Exchange, Endotoxins, Regression Analysis, Electrophoresis, Polyacrylamide Gel
Abstract: The present study aims to characterize the Cry2Ad toxin protein isolated from a Bacillus thuringiensis strain, BRC-HZP10, which have a potential insecticidal activity against larvae of the diamondback moth, Plutella xylostella (L.). The crude Bt toxin proteins were isolated and purified by cation exchange chromatography, then equilibrated with 0.2 M NaOH buffer, pH 4.0, followed by ultraviolet detection at 280 nm and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. A refined Cry2Ad toxin protein with 88.34% purity was eventually obtained and used for a bioassay by feeding it to P. xylostella. The results showed conspicuous insecticidal activity towards P. xylostella with 50% lethal concentration of 6.84 μg/mL and 95% confidence interval of 5.77-7.91 mg/mL. At a concentration of 16.38 μg/mL, the intake of Cry2Ad protein significantly shortened the oviposition period and larval developmental duration, but significantly reduced the fecundity and egg hatchability of the population compared to those of control (without treatment with Cry2Ad protein) (P < 0.05). These results indicate that the Cry2Ad protein plays an effective role in controlling the population of P. xylostella.
Published: 2015

43. Preparation and transport properties of aqueous sol-gel synthesized NaCo2O4

Author: J. Y. Liao, Chia-Jyi Liu, T. W. Wu, and B. Y. Jen
Subjects: Materials science, Aqueous solution, Mechanical Engineering, Inorganic chemistry, Sintering, chemistry.chemical_element, Partial pressure, Thermoelectric materials, Oxygen, chemistry, Chemical engineering, Mechanics of Materials, Electrical resistivity and conductivity, Seebeck coefficient, General Materials Science, Sol-gel
Abstract: We have successfully prepared thermoelectric materials NaCo2O4−δ at lower temperature (700°C) using aqueous sol-gel methods. We find that the electrical resistivity and thermopower of NaCo2O4−δ depend strongly on the sintering temperature and partial pressure of oxygen. The oxygen content of NaCo2O4−δ is found to decrease with increasing sintering temperature. The sample prepared at the combination of 700°C and pure flowing oxygen exhibits the highest value of power factor.
Published: 2004
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44. Efficacy of the theory of planned behavior in predicting breastfeeding: Meta-analysis and structural equation modeling

Author: T. F. Wang, J. Y. Liao, Chiu Mieh Huang, and Jong Long Guo
Subjects: Psychometrics, Breastfeeding, Theory of planned behavior, MEDLINE, CINAHL, Intention, Models, Theoretical, Structural equation modeling, Developmental psychology, 03 medical and health sciences, 0302 clinical medicine, Breast Feeding, 030225 pediatrics, Meta-analysis, Humans, Female, 030212 general & internal medicine, Psychology, Breast feeding, General Nursing, Clinical psychology, Forecasting
Abstract: Purpose This study assessed the applicability and efficacy of the theory of planned behavior (TPB) in predicting breastfeeding. Background The TPB assumes a rational approach for engaging in various behaviors, and has been used extensively for explaining health behavior. However, most studies have tested the effectiveness of TPB constructs in predicting how people perform actions for their own benefit rather than performing behaviors that are beneficial to others, such as breastfeeding infants. A meta-analysis approach could help clarify the breastfeeding practice to promote breastfeeding. Methods This study used meta-analytic procedures. We searched for studies to include in our analysis, examining those published between January 1, 1990 and December 31, 2013 in PubMed, Medline, CINAHL, ProQuest, and Mosby’s Index. We also reviewed journals with a history of publishing breastfeeding studies and searched reference lists for potential articles to include. Results Ten studies comprising a total of 2694 participants were selected for analysis. These studies yielded 10 effect sizes from the TPB, which ranged from 0.20 to 0.59. Structural equation model analysis using the pooled correlation matrix enabled us to determine the relative coefficients among TPB constructs. Attitude, subjective norms, and perceived behavioral control were all significant predictors of breastfeeding intention, whereas intention was a strong predictor of breastfeeding behavior. Perceived behavioral control reached a borderline level of significance to breastfeeding behavior. Theoretical and empirical implications are discussed from the perspective of evidence-based practice.
Published: 2014

45. Full-length sequence analysis of a distinct isolate of Bidens mottle virus infecting sunflower in Taiwan

Author: Chung-Chi Hu, T. C. Deng, J. Y. Liao, C. C. Chen, and Chieh Chang
Subjects: biology, Potyviridae, Bidens mottle virus, Sequence analysis, Molecular Sequence Data, Potyvirus, Taiwan, Nucleic acid sequence, Sequence Homology, Genome, Viral, General Medicine, biology.organism_classification, Sunflower, Virology, Plant virus, Helianthus annuus, Helianthus, RNA, Viral, Sequence Analysis, Plant Diseases, Polyproteins
Abstract: The full-length genome of a potyvirus, previously known as sunflower chlorotic spot virus isolate SF-1 (SCSV-SF-1) which causes novel symptoms on sunflowers (Helianthus annuus), was sequenced and analyzed. The genome of SCSV-SF-1 is 9,741 nucleotides long, encoding a polyprotein of 3,071 amino acids containing the consensus motifs of potyviruses. Sequence comparison revealed that the 3'-terminus of SCSV-SF-1 shared over 96% similarities with isolates of Bidens mottle virus (BiMoV). However, SCSV-SF-1 has a very narrow host range, excluding the diagnostic host species for BiMoV, Bidens pilosa and Zinnia elegans. Therefore, SCSV-SF-1 is a distinct isolate of BiMoV. This is the first report of the full-length nucleotide sequence of BiMoV infecting sunflower in Taiwan.
Published: 2009
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46. A study of four fermion processes at LEP

Author: P. Marchesini, M. MacDermott, M. A. Niaz, T. Angelescu, R. Malik, G. Landi, S. X. Wu, Simone Paoletti, Manjit Kaur, Ming Zeng, X. R. Shi, Daqiang Zhang, H. Anderhub, W. van Rossum, P. Extermann, J. Busenitz, J. M. Lubbers, M. Caria, Felicitas Pauss, L. Romero, Raffaello D'Alessandro, D. DiBitonto, M. Röhner, S. Rosier-Lees, R. Barillère, Christoph Schäfer, I. Leedom, B. Z. Yang, H. Hofer, K. L. Tung, Yu. Kamyshkov, Adrian Biland, A. Koulbardis, Ph. Rosselet, Wt Lin, D.W. Schmitz, G. Pascale, G.G.G. Massaro, C. Leggett, Claudio Luci, M. Guanziroli, Robert Clare, Leonardo Merola, W. G. Ma, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Napolitano, I. Josa-Mutuberria, P. Le Coultre, H. S. Chen, J. G. Xu, L. Servoli, S. J. Fan, M. Fukushima, G.B. Mills, Maurizio Biasini, L. Urbán, Giovanni Ambrosi, M. Bourquin, S. Röhner, F. Wittgenstein, Zhuoxiang Ren, Y. J. Pei, Roberto Battiston, D. J. Schotanus, J. P. Martin, F. Ferroni, I. Vorobiev, Y. Zeng, J. M. You, L. Ludovici, M. Steuer, G. Forconi, J. Weber, K. Hangarter, C. G. Yang, Peter Denes, Paolo Bagnaia, K. Strauch, M. Lenti, Stefan Roth, E. Drago, T. Azemoon, R. T. Van de Walle, V. Koutsenko, A. Nadtochy, Egidio Longo, P. Zemp, R. de Asmundis, V. R. Krastev, Marta Felcini, K. Banicz, J. K. Kim, R. Starosta, D. Perret-Gallix, D. Luckey, W. Lu, Steven Ahlen, E. Shumilov, A. Marin, G. M. Bilei, Gy L. Bencze, G. A. Yang, A. C. Weber, A. Engler, M. M. Ilyas, V. Shoutko, J. M. Le Goff, B. C. Riemers, Reinhard W. Schulte, K. S. Kumar, D. H. Wright, N. Gheordanescu, M. Capell, D. Boutigny, W. Kittel, A. Arefiev, A. Adam, T. Paul, Francesco Becattini, I. Scott, Marcos Cerrada, S. C. Tonwar, Andrea Contin, J. C. Sens, G. S. Sanders, Andre Sopczak, Gerard Fernandez, M. Tonutti, P. G. Seiler, J. A. Rubio, H. S. Fesefeldt, Y. Mi, R. Fabbretti, Gerjan Bobbink, B. Borgia, H. R. Dimitrov, M. T. Choi, Frank Filthaut, M. Möller, O. Fackler, R. Weill, Francesca Nessi-Tedaldi, K. N. Qureshi, W. Friebel, F. Cesaroni, J. Y. Liao, Thomas Ferguson, Axel König, M. Hebert, E. Valente, M. Wadhwa, Panos A Razis, Jozsef Toth, A. L. Anderson, F. Marion, J. D. Burger, H. F. Chen, A. Buytenhuijs, A. Gougas, Bolek Wyslouch, J. Ulbricht, Georgi Sultanov, T. S. Dai, G. Mirabelli, Yu. Galaktionov, Emilio Leonardi, G. Rahal-Callot, J. F. Zhou, R. A. Khan, B. P. Roe, C. Wang, J. Alcaraz, D. McNally, E. Gonzalez, S. Patricelli, Stefan Kirsch, Marco Meschini, Elisabetta Gallo, R. Bock, O. Toker, A. Lebedev, D. Kirkby, K. Riles, Dong-Chul Son, T. Kramer, E. Dénes, R. Sehgal, Pierluigi Paolucci, H. El Mamouni, J. J. Blaising, Chenjie Gu, Q. Ye, Chenliang Wang, J. Berdugo, F. Cotorobai, Stefano Giagu, P. Schmitz, K. Lübelsmeyer, Piero Spillantini, M. Gailloud, P. Arce, G. Schwering, G. Viertel, I. Clare, F. J. Rodriguez, F. Marzano, G. Coignet, W. Krenz, V. P. Andreev, H. R. Gustafson, Christopher George Tully, G. Chiefari, D. Z. Shen, S. Shevchenko, S. Reucroft, E. Nagy, F. Plasil, Mariagrazia Alviggi, C. F. He, D. Goujon, K. Schultze, H. Suter, J. M. Ma, Mingshui Chen, Luca Lista, S. Shotkin, K. Freudenreich, Helmut Vogel, M. Chemarin, J. A. Bakken, M. Sassowsky, Wolfgang Lohmann, H. Vogt, B. Bertucci, Samuel C.C. Ting, G. F. Susinno, Cheng Chen, A. Mihul, S. C. Kim, M. Pauluzzi, S. Morganti, A. Bujak, Oliver Kornadt, M. Pohl, F. Behner, G. M. Chen, Vincenzo Innocente, L. Fredj, J. Schwenke, F. C. Erné, Nicanor Colino, M. L. Brooks, I. Vetlitsky, D. Lanske, W. J. Burger, Andrea Baschirotto, C. Zaccardelli, D. Fernandez, Kajari Mazumdar, D. Ren, X. Y. Cui, Yuehong Xie, Roberto Castello, A. Kasser, Y. F. Wang, R. Leiste, P. Vikas, S. Costantini, L. Martinez-Laso, Christoph Paus, G. Passaleva, J. Shukla, G. Tsipolitis, A. A. Vorobyoy, S. Khokhar, T.R. McMahon, S. Müller, A. A. Syed, W. W. Kinnison, S. C. Yeh, U. Vikas, Guofan Hu, L. J. Gutay, Z. M. Wang, A. Atamanchuk, M. S. Sarakinos, S. Lanzano, Yanwen Liu, M. Rescigno, C. Maña, O. Adriani, U. Becker, I. C. Brock, D. Gele, Xd Cai, M. Bosetti, C. Dionisi, B. Monteleoni, T. E. Coan, J. G. Branson, F. Sticozzi, A. Pevsner, Pablo Garcia-Abia, K. Sudhakar, Lucas Taylor, Lamberto Luminari, S. Easo, Alain Hervé, Davide Piccolo, I. Duran, Z. W. Yin, J. S. Lee, S. N. Ganguli, V. Plyaskin, M. Fabre, M. Schneegans, D. M. Lee, M. Yzerman, A. Bay, Sabine Riemann, S. Wynhoff, C-Q. Li, A. Degré, J. B. Ye, Carlo Civinini, Marcella Diemoz, R. Morand, Z. L. Xue, O. Rind, M. Maolinbay, G. Raven, F. J. Eppling, G. J. Zhou, L. W. Jones, Howard A. Stone, M. Rattaggi, M. T. Dova, M. Aguilar-Benitez, J. Mnich, R. C. Ball, Herwig Schopper, Y. G. Kim, V. K. Gupta, Jun Guo, Pierre Lecomte, D. P. Stickland, G. Sartorelli, B. Lindemann, H. Postema, M. White, Y. H. Chang, D. S. Yan, H. O. Cohn, L. Antonov, George Alverson, S. M. Ting, A. Rubbia, Werner Lustermann, Y. Mir, C. H. Ye, J. S. Kapustinsky, D. Pandoulas, Marcel Merk, X. T. Cui, S. Ro, T. Spickermann, J. Perrier, A. Krivshich, Michael Dittmar, Bernard Ille, J. D. Swain, P. McBride, R. Bizzarri, J. Bao, H. A. Rizvi, Gianpaolo Carlino, F. DeNotaristefani, A. Böhm, A. Kunin, J. M. Salicio, Hafeez R Hoorani, W. Y. Chen, W. J. Metzger, S. Goldfarb, J. T. He, F. L. Linde, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Ph Fisher, H. Rykaczewski, Giovanni Organtini, Y. Karyotakis, S. Chung, P.V.K.S. Baba, Attilio Santocchia, Jean Fay, M. Dhina, Z. Y. Lin, N. Yunus, P. Berges, R. Mount, B. L. Betev, Ren-Yuan Zhu, Luciano Barone, A. Nippe, G. Gratta, D. Duchesneau, Alexander Malinin, X. L. Wang, A. Gurtu, A. M. Cartacci, R. Raghavan, Els Koffeman, H. J. Schreiber, Laurent Vuilleumier, Z. F. Gong, E. Brambilla, Z. Z. Xu, J. Wenninger, V. Pojidaev, A. Hasan, H. Kuijten, M. N. Kienzle-Focacci, R. Rosmalen, J. Behrens, V. Soulimov, A. Tsaregorodtsev, P. J. Li, K. Y. Lee, P. Lebrun, BT Bouwens, Guo-Ming Chen, U. Uwer, A. Chen, J. Salicio, M. Gruenewald, U. K. Chaturvedi, Y. S. Lu, J. H. Field, C. Y. Chien, A. Kirkby, Dimitri Bourilkov, N. E. Moulai, E. Fiandrini, Luca Malgeri, G. Sauvage, Z. D. Qi, Harvey B Newman, K. Hilgers, L. Djambazov, Konrad Deiters, M. Vivargent, M. Sachwitz, Alberto Aloisio, A. Ricker, X. W. Tang, I. Sheer, P. A. Piroué, B. Zhou, B. C.C. van der Zwaan, Tariq Aziz, Crisostomo Sciacca, Marco Pieri, C. Neyer, P. G. Rancoita, B. N. Jin, H. Nowak, W. Wallraff, T. J. Wenaus, S. Banerjee, Zp Zhang, G. Terzi, D. Antreasyan, Qi An, P. Kapinos, P. Duinker, Simonetta Gentile, A. Klimentov, H. Janssen, Kenneth Francis Read, L. Z. Sun, D. Hauschildt, Jianming Qian, G. Hu, Carlos Willmott, Speranza Falciano, H. T. Li, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, and IHEF (IoP, FNWI)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Electron–positron annihilation, Monte Carlo method, Elementary particle, Fermion, 01 natural sciences, Standard Model, Nuclear physics, Recoil, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Particle Physics - Experiment, Bhabha scattering
Abstract: We have studied the four-fermion processes ee → eeee, eeμμ, eeττ, μμμμ, μμττ, eeqq and μμqq with the L3 detector at LEP. For an integrated luminosity of 36 pb-, corresponding to 960 000 hadronic Z decays, we find a total of 67 candidate events. The rate and kinematical distributions are found to be consistent with first order Monte Carlo calculations based on the Standard Model. No significant structure is seen in the dilepton invariant or recoil mass spectra. © 1994.
Published: 1994
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47. Measurement of the Inclusive B-]Tau-Nu-X Branching Ratio

Author: M. ACCIARRI, A. ADAM, O. ADRIANI, M. AGUILARBENITEZ, S. AHLEN, J. ALCARAZ, G. ALVERSON, G. AMBROSI, Q. AN, H. ANDERHUB, A. L. ANDERSON, V. P. ANDREEV, T. ANGELESCU, L. ANTONOV, D. ANTREASYAN, G. ALKHAZOV, P. ARCE, A. AREFIEV, T. AZEMOON, T. AZIZ, P. V. K., P. BAGNAIA, J. A. BAKKEN, L. BAKSAY, R. C. BALL, S. BANERJEE, K. BANICZ, R. BARILLERE, L. BARONE, A. BASCHIROTTO, R. BATTISTON, A. BAY, F. BECATTINI, U. BECKER, G. L. BENCZE, J. BERDUGO, P. BERGES, B. BERTUCCI, B. L. BETEV, M. BIASINI, A. BILAND, G. M. BILEI, R. BIZZARRI, J. J. BLAISING, G. J. BOBBINK, R. BOCK, A. BOHM, B. BORGIA, D. BOURILKOV, M. BOURQUIN, D. BOUTIGNY, B. BOUWENS, E. BRAMBILLA, J. G. BRANSON, V. BRIGLJEVIC, I. C. BROCK, M. BROOKS, A. BUJAK, J. D. BURGER, W. J. BURGER, C. BURGOS, J. BUSENITZ, A. BUYTENHUIJS, A. BYKOV, X. D. CAI, M. CAPELL, M. CARIA, G. CARLINO, A. M. CARTACCI, J. CASAUS, R. CASTELLO, N. CAVALLO, M. CERRADA, F. CESARONI, M. CHAMIZO, Y. H. CHANG, U. K. CHATURVEDI, M. CHEMARIN, A. CHEN, C. CHEN, G. CHEN, G. M. CHEN, H. F. CHEN, H. S. CHEN, M. CHEN, C. Y. CHIEN, M. T. CHOI, S. CHUNG, C. CIVININI, I. CLARE, R. CLARE, T. E. COAN, H. O. COHN, G. COIGNET, N. COLINO, A. CONTIN, S. COSTANTINI, F. COTOROBAI, B. DELACRUZ, X. T. CUI, X. Y. CUI, T. S. DAI, R. DALESSANDRO, R. DEASMUNDIS, A. DEGRE, K. DEITERS, E. DENES, P. DENES, F. DENOTARISTEFANI, D. DIBITONTO, M. DIEMOZ, H. R. DIMITROV, C. DIONISI, L. DJAMBAZOV, M. T. DOVA, E. DRAGO, D. DUCHESNEAU, P. DUINKER, I. DURAN, S. EASO, H. ELMAMOUNI, A. ENGLER, F. J. EPPLING, F. C. ERNE, P. EXTERMANN, R. FABBRETTI, M. FABRE, S. FALCIANO, S. J. FAN, A. FAVARA, J. FAY, M. FELCINI, T. FERGUSON, D. FERNANDEZ, G. FERNANDEZ, F. FERRONI, H. FESEFELDT, E. FIANDRINI, J. H. FIELD, F. FILTHAUT, P. H. FISHER, G. FORCONI, L. FREDJ, K. FREUDENREICH, M. FUKUSHIMA, M. GAILLOUD, Y. GALAKTIONOV, E. GALLO, S. N. GANGULI, P. GARCIAABIA, S. GENTILE, J. GERALD, N. GHEORDANESCU, S. GIAGU, S. GOLDFARB, Z. F. GONG, E. GONZALEZ, A. GOUGAS, D. GOUJON, G. GRATTA, M. GRUENEWALD, C. GU, M. GUANZIROLI, J. K. GUO, V. K. GUPTA, A. GURTU, H. R. GUSTAFSON, L. J. GUTAY, A. HASAN, D. HAUSCHILDT, C. F. HE, J. T. HE, T. HEBBEKER, M. HEBERT, A. HERVE, K. HILGERS, H. HOFER, H. HOORANI, S. R. HOU, G. HU, G. Q. HU, B. ILLE, M. M. ILYAS, V. INNOCENTE, H. JANSSEN, B. N. JIN, L. W. JONES, P. DEJONG, I. JOSAMUTUBERRIA, A. KASSER, R. A. KHAN, Y. KAMYSHKOV, P. KAPINOS, J. S. KAPUSTINSKY, Y. KARYOTAKIS, M. KAUR, S. KHOKHAR, M. N. KIENZLEFOCACCI, D. KIM, J. K. KIM, S. C. KIM, Y. G. KIM, W. W. KINNISON, A. KIRKBY, D. KIRKBY, S. KIRSCH, W. KITTEL, A. KLIMENTOV, A. C. KONIG, E. KOFFEMAN, O. KORNADT, V. KOUTSENKO, A. KOULBARDIS, R. W. KRAEMER, T. KRAMER, V. R. KRASTEV, W. KRENZ, H. KUIJTEN, K. S. KUMAR, A. KUNIN, P. L. DEGUEVARA, G. LANDI, D. LANSKE, S. LANZANO, A. LEBEDEV, P. LEBRUN, P. LECOMTE, P. LECOQ, P. LECOULTRE, D. M. LEE, J. S. LEE, K. Y. LEE, I. LEEDOM, C. LEGGETT, J. M. LEGOFF, R. LEISTE, M. LENTI, E. LEONARDI, P. LEVTCHENKO, C. LI, P. J. LI, J. Y. LIAO, W. T. LIN, Z. Y. LIN, F. L. LINDE, B. LINDEMANN, L. LISTA, Y. LIU, W. LOHMANN, E. LONGO, W. LU, Y. S. LU, J. M. LUBBERS, K. LUBELSMEYER, C. LUCI, D. LUCKEY, L. LUDOVICI, L. LUMINARI, W. LUSTERMANN, W. G. MA, M. MACDERMOTT, L. MALGERI, R. MALIK, A. MALININ, C. MANA, M. MAOLINBAY, P. MARCHESINI, F. MARION, A. MARIN, J. P. MARTIN, F. MARZANO, G. G. G., K. MAZUMDAR, P. MCBRIDE, T. MCMAHON, D. MCNALLY, M. MERK, M. MESCHINI, W. J. METZGER, Y. MI, A. MIHUL, G. B. MILLS, Y. MIR, G. MIRABELLI, J. MNICH, M. MOLLER, B. MONTELEONI, R. MORAND, S. MORGANTI, N. E. MOULAI, R. MOUNT, S. MULLER, E. NAGY, F. NESSITEDALDI, H. NEWMAN, M. A. NIAZ, A. NIPPE, H. NOWAK, G. ORGANTINI, D. PANDOULAS, S. PAOLETTI, P. PAOLUCCI, G. PASCALE, G. PASSALEVA, T. PAUL, M. PAULUZZI, C. PAUS, F. PAUSS, Y. J. PEI, S. PENSOTTI, D. PERRETGALLIX, J. PERRIER, A. PEVSNER, D. PICCOLO, M. PIERI, J. C. PINTO, P. A. PIROUE, F. PLASIL, V. PLYASKIN, M. POHL, V. POJIDAEV, H. POSTEMA, Z. D. QI, J. M. QIAN, K. N. QURESHI, R. RAGHAVAN, G. RAHALCALLOT, P. G. RANCOITA, M. RATTAGGI, G. RAVEN, P. RAZIS, K. READ, M. REDAELLI, D. REN, Z. REN, M. RESCIGNO, S. REUCROFT, A. RICKER, S. RIEMANN, B. C. RIEMERS, O. RIND, H. A. RIZVI, S. RO, A. ROBOHM, F. J. RODRIGUEZ, B. P. ROE, M. ROHNER, S. ROHNER, L. ROMERO, S. ROSIERLEES, R. ROSMALEN, P. ROSSELET, W. VANROSSUM, S. ROTH, A. RUBBIA, J. A. RUBIO, H. RYKACZEWSKI, M. SACHWITZ, J. SALICIO, J. M. SALICIO, E. SANCHEZ, G. S. SANDERS, A. SANTOCCHIA, M. E. SARAKINOS, G. SARTORELLI, M. SASSOWSKY, G. SAUVAGE, C. SCHAFER, V. SCHEGELSKY, D. SCHMITZ, P. SCHMITZ, M. SCHNEEGANS, N. SCHOLZ, H. SCHOPPER, D. J. SCHOTANUS, S. SHOTKIN, H. J. SCHREIBER, J. SHUKLA, R. SCHULTE, K. SCHULTZE, J. SCHWENKE, G. SCHWERING, I. SCOTT, R. SEHGAL, P. G. SEILER, J. C. SENS, L. SERVOLI, I. SHEER, D. Z. SHEN, S. SHEVCHENKO, X. R. SHI, E. SHUMILOV, V. SHOUTKO, D. SON, A. SOPCZAK, V. SOULIMOV, C. SPARTIOTIS, T. SPICKERMANN, P. SPILLANTINI, M. STEUER, D. P. STICKLAND, F. STICOZZI, H. STONE, K. STRAUCH, K. SUDHAKAR, G. SULTANOV, L. Z. SUN, G. F. SUSINNO, H. SUTER, J. D. SWAIN, A. A. SYED, X. W. TANG, L. TAYLOR, S. C. C., S. M. TING, O. TOKER, M. TONUTTI, S. C. TONWAR, J. TOTH, G. TROWITZSCH, A. TSAREGORODTSEV, G. TSIPOLITIS, C. TULLY, T. TUUVA, J. ULBRICHT, L. URBAN, U. UWER, E. VALENTE, R. T. VANDEWALLE, I. VETLITSKY, G. VIERTEL, P. VIKAS, U. VIKAS, M. VIVARGENT, H. VOGEL, H. VOGT, I. VOROBIEV, A. A. VOROBYOV, L. VUILLEUMIER, M. WADHWA, W. WALLRAFF, J. C. WANG, C. R. WANG, X. L. WANG, Y. F. WANG, Z. M. WANG, A. WEBER, J. WEBER, R. WEILL, J. WENNINGER, M. WHITE, C. WILLMOTT, F. WITTGENSTEIN, D. WRIGHT, S. X. WU, S. WYNHOFF, B. WYSLOUCH, Y. Y. XIE, Z. Z. XU, Z. L. XUE, D. S. YAN, B. Z. YANG, C. G. YANG, G. YANG, X. Y. YAO, C. H. YE, J. B. YE, Q. YE, S. C. YEH, Z. W. YIN, J. M. YOU, N. YUNUS, M. YZERMAN, C. ZACCARDELLI, M. ZENG, Y. ZENG, D. H. ZHANG, Z. P. ZHANG, B. ZHOU, G. J. ZHOU, J. F. ZHOU, R. Y. ZHU, A. ZICHICHI, B. C. C., ALOISIO, ALBERTO, ALVIGGI, MARIAGRAZIA, CHIEFARI, GIOVANNI, MEROLA, LEONARDO, NAPOLITANO, MARCO, PATRICELLI, SERGIO, SCIACCA, CRISOSTOMO, Acciarri, M., Adam, A., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. L., Andreev, V. P., Angelescu, T., Antonov, L., Antreasyan, D., Alkhazov, G., Arce, P., Arefiev, A., Azemoon, T., Aziz, T., P. V. K., Bagnaia, P., Bakken, J. A., Baksay, L., Ball, R. C., Banerjee, S., Banicz, K., Barillere, R., Barone, L., Baschirotto, A., Battiston, R., Bay, A., Becattini, F., Becker, U., Bencze, G. L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Biasini, M., Biland, A., Bilei, G. M., Bizzarri, R., Blaising, J. J., Bobbink, G. J., Bock, R., Bohm, A., Borgia, B., Bourilkov, D., Bourquin, M., Boutigny, D., Bouwens, B., Brambilla, E., Branson, J. G., Brigljevic, V., Brock, I. C., Brooks, M., Bujak, A., Burger, J. D., Burger, W. 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W., Kirkby, A., Kirkby, D., Kirsch, S., Kittel, W., Klimentov, A., Konig, A. C., Koffeman, E., Kornadt, O., Koutsenko, V., Koulbardis, A., Kraemer, R. W., Kramer, T., Krastev, V. R., Krenz, W., Kuijten, H., Kumar, K. S., Kunin, A., Deguevara, P. L., Landi, G., Lanske, D., Lanzano, S., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Lecoultre, P., Lee, D. M., Lee, J. S., Lee, K. Y., Leedom, I., Leggett, C., Legoff, J. M., Leiste, R., Lenti, M., Leonardi, E., Levtchenko, P., Li, C., P. J., Li, Liao, J. Y., Lin, W. T., Lin, Z. Y., Linde, F. L., Lindemann, B., Lista, L., Liu, Y., Lohmann, W., Longo, E., Lu, W., Y. S., Lu, Lubbers, J. M., Lubelsmeyer, K., Luci, C., Luckey, D., Ludovici, L., Luminari, L., Lustermann, W., W. G., Ma, Macdermott, M., Malgeri, L., Malik, R., Malinin, A., Mana, C., Maolinbay, M., Marchesini, P., Marion, F., Marin, A., Martin, J. P., Marzano, F., G. G. G., Mazumdar, K., Mcbride, P., Mcmahon, T., Mcnally, D., Merk, M., Merola, Leonardo, Meschini, M., Metzger, W. 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Subjects: E+E-PHYSICS, LUND MONTE-CARLO, HADRONS, High Energy Physics::Experiment, Z(0), Nuclear Experiment, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), JET FRAGMENTATION, DECAYS, L3 EXPERIMENT
Abstract: Using the L3 detector, the branching ratio BR(b --> taunuX) has been measured using a sample of Z --> bbBAR events tagged by high momentum and high transverse momentum leptons in one hemisphere and with missing energy in the opposite hemisphere. From a sample of 948000 hadronic events we find BR(b --> taunuX) = (2.4 +/- 0.7 (stat.) +/- 0.8 (syst.))%.
Published: 1994

48. Inclusive search for the charmless radiative decay of the b-quark (b → sγ)

Author: L. Vuilleumier, Yu. Kamyshkov, V. K. Gupta, I. Clare, R. Bizzarri, Gianpaolo Carlino, A.M. Cartacci, Roberto Battiston, M. T. Choi, S. Ro, J. Munich, B. Borgia, G. Schwering, Ren-Yuan Zhu, J. M. Lubbers, R. Fabbretti, D. DiBitonto, M. Maolinbay, W. Lohmann, A. C. Weber, B. N. Jin, F. Wittgenstein, G. F. Susinno, L. Z. Sun, Luca Lista, A. Tsaregorodtsev, P. Berges, T. E. Coan, A. Lebedev, Dong-Chul Son, A. A. Syed, A. Santocchia, F. Nessi-Tedaldi, R. Becker, M. Yzerman, J. J. Blaising, K. L. Tung, Jun Guo, B. Lindemann, D. H. Zhang, F. Sticozzi, A. Mihul, K. S. Kumar, B. C. Stringfellow, Yuehong Xie, J. Perrier, A. Gurtu, G. Pascale, M. Fukushima, S. Shotkin, V. R. Krastev, H.F. Chen, J. Busenitz, K. Schultze, G. Landi, W. Y. Chen, E. Nagy, Dimitri Bourilkov, B.C. Riemers, R. Mount, Pablo Garcia-Abia, K. Lübelsmeyer, Alain Hervé, S. Kirsch, A. Nippe, Alexander Malinin, E. Brambilla, B. Hartmann, Mariagrazia Alviggi, Tariq Aziz, A. Hasan, M. Pauluzzi, D. Lanske, R. Barillère, Jianming Qian, A. Bay, G. Hu, Maria-Teresa Dova, Raffaello D'Alessandro, R. Raghavan, A. C. König, M. Merk, Christoph Paus, H. Nowak, M. M. Ilyas, Leonardo Merola, X. W. Tang, D. Ren, Carlo Civinini, A.A. Vorobyov, J. G. Xu, G. Raven, I. Vetlitsky, A. Marin, J. S. Lee, W.G. Ma, M. Lenti, P. Extermann, D. M. Lee, S. Jezequel, Zheng Wang, R. Rosmalen, M. Aguilar-Benitez, C. Gu, K. Freudenreich, B. Z. Yang, Yueh-Feng Liu, D. Pandoulas, D. Fernandez, J. Berdugo, Yongsun Kim, Stefan Roth, M. Röhner, B. Zhou, G. Fernandez, H. Postema, C. Spartiotis, D. Perret-Gallix, J. Bechtluft, W. van Rossum, M. Chen, V. Pojidaev, Adrian Biland, B. Ille, C. Dionisi, T. Spickermann, T. Azemoon, L. Gutay, F. J. Rodriguez, G. Finocchiaro, Y. Karyotakis, N. Yunus, S. Schulte, G. Gratta, Z. Y. Lin, J. M. Salicio, Z. D. Qi, A. Krivshich, Z. F. Gong, K. Sudhakar, E. Drago, R. Morand, Z. L. Xue, G. B. Mills, H.J. Schreiber, S. J. Fan, M. Pohl, M. Hebert, Crisostomo Sciacca, J. C. Sens, D. Antreasyan, M. Brooks, Marco Pieri, Charles Leggett, J. A. Rubio, G. Yang, J. D. Burger, G. Rahal-Callot, M. Zeng, A. L. Anderson, Marta Felcini, B. L. Betev, Harvey B Newman, K. Hilgers, Marcos Cerrada, P. Zemp, A. Rubbia, S. Ahlen, V. Schegelsky, D. H. Wright, J. B. Ye, O. Fackler, Howard A. Stone, T.S. Dai, M. Guanziroli, Z. L. Ren, E. Fiandrini, W. Kittel, L. Ludovici, N. Gheordanescu, Y. J. Pei, E. Leonardi, Y. S. Lu, A. Gougas, D. P. Stickland, J. F. Zhou, Francesco Becattini, G. M. Bilei, D. Gele, A. Engler, P. Duinker, Andrea Contin, M. Capell, G. Forconi, D. Goujon, J. M. Ma, R. T. Van de Walle, P. Marchesini, S. Giagu, O. Adriani, J. K. Kim, Konrad Deiters, M. Dhina, M. Vivargent, T. McMahon, P. G. Seiler, Y. Mir, K. Read, L. Servoli, R. Malik, Martin White, Alberto Aloisio, Lucas Taylor, A. Ricker, S. Patricelli, S. Easo, H. S. Fesefeldt, A. Klimentov, F. Marion, U. K. Chaturvedi, J. Alcaraz, D. Boutigny, J. P. Martin, Wt Lin, J. S. Kapustinsky, Zhiqing Zhang, L. 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G., Yang, G., C. H., Ye, J. B., Ye, Ye, Q., Yeh, S. C., Yin, Z. W., You, J. M., Yunus, N., Yzerman, M., Zaccardelli, C., Zemp, P., Zeng, M., Zeng, Y., Zhang, D. H., Zhang, Z. P., Zhou, B., Zhou, G. J., Zhou, J. F., Zhu, R. Y., Zichichi, A., and B. C. C.
Subjects: Nuclear and High Energy Physics, Top quark, Particle physics, Meson, Electron–positron annihilation, Radiative decay, Elementary particle, flavor changing neutral current, TOP QUARK, 01 natural sciences, Bottom quark, PHYSICS, Nuclear physics, MONTE-CARLO, QCD ENHANCEMENT, 0103 physical sciences, w boson, Electromagnetismo, 010306 general physics, SUPERSYMMETRY, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, Physics, 010308 nuclear & particles physics, Flavor-changing neutral current, Física, Supersymmetry, MESONS, EMISSION, Particle Physics - Experiment
Abstract: We report on the search for the electromagnetic penguin decay b → sγ at √s ≈ mZ. We find no evidence for a signal and place an upper limit on the decay rate Br(b → sγ) < 1.2 × 10−3 at 90% C.L., Facultad de Ciencias Exactas
Published: 1993
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49. Determination of the effective electroweak mixing angle from Z decays

Author: R. Fabbretti, H. Anderhub, Lamberto Luminari, Luca Lista, D. Fernandez, Yanwen Liu, S. Pensotti, Valery Schegelsky, E. Dénes, R. Sehgal, Sabine Riemann, Ren-Yuan Zhu, Luciano Barone, F. C. Erné, B. P. Roe, C. Wang, M. MacDermott, R. Weill, Ph Fisher, R. C. Ball, H. Rykaczewski, Giovanni Organtini, G. Sartorelli, Y. Karyotakis, A. L. Anderson, M. A. Niaz, F. Marion, J. F. Zhou, K. Mazumdar, Roberto Castello, Yu. Kamyshkov, P. Extermann, S. Chung, P.V.K.S. Baba, Attilio Santocchia, Jean Fay, Dimitri Bourilkov, C. Neyer, P. Lecomte, I. Leedom, B. Z. Yang, P. Vikas, R. Barillère, M. Dhina, D. Boutigny, Marco Meschini, H. Hofer, C. Warner, A. Arefiev, K. L. Tung, G. B. Mills, A. Lebedev, G. Tsipolitis, R. Klöckner, D. Kirkby, A. Gurtu, P. G. Rancoita, Els Koffeman, H. J. Schreiber, Werner Lustermann, C. G. Yang, B. N. Jin, H. Nowak, A. Krivshich, Steven Ahlen, N. E. Moulai, P. Schmitz, Z. Y. Lin, L. Antonov, T. Kraemer, E. Fiandrini, Dong-Chul Son, J. J. Blaising, Egidio Longo, Y. J. Pei, P. Zemp, J. Bechtluft, R. de Asmundis, K. S. Kumar, E. Brambilla, B. Hartmann, Christopher George Tully, M. M. Ilyas, Roberto Battiston, A. Hasan, P. K. Malhotra, H. A. Rizvi, A. Kunin, G. Herten, A. Bujak, Oliver Kornadt, M. Pohl, Hafeez R Hoorani, Yuehong Xie, F. Fesefeldt, S. Khokhar, S. Müller, K. Freudenreich, J. M. Salicio, K. Sudhakar, D. Pandoulas, T. Spickermann, W. Wallraff, Wolfgang Lohmann, H. Vogt, B. Bertucci, Y. F. Wang, W. Friebel, C-Q. Li, B. L. Betev, S. C. Kim, S. Banerjee, Gerjan Bobbink, W. J. Metzger, M. Caria, V. K. Gupta, Zp Zhang, B. Borgia, G. Sauvage, M. Wadhwa, Z. D. Qi, Xd Cai, Nicanor Colino, Bernard Ille, Z. M. Wang, K. Riles, M. Gruenewald, J. T. He, Tariq Aziz, J. B. Ye, Stefan Kirsch, F. Cesaroni, F. J. Rodriguez, G. Schwering, Pierluigi Paolucci, M. Gailloud, M. Möller, J. Y. Liao, Raffaello D'Alessandro, O. Rind, F. Marzano, G. Coignet, W. Krenz, R. Bizzarri, G. F. Susinno, A. M. Cartacci, R. Raghavan, T. McHamon, A. C. König, Mariagrazia Alviggi, H. R. Gustafson, D. Z. Shen, J. A. Bakken, F. L. Linde, J. Ulbricht, R. Mount, U. K. Chaturvedi, Laurent Vuilleumier, Y. S. Lu, Gianpaolo Carlino, F. DeNotaristefani, M. Sassowsky, J. D. Swain, D. Antreasyan, A. Koulbardis, Harvey B Newman, K. Hilgers, R. Becker, An.A. Vorobyov, M. T. Choi, Emilio Leonardi, S. X. Wu, C. Maña, I. C. Brock, F. Wittgenstein, P. McBride, Leonardo Merola, Giovanni Ambrosi, L. Ludovici, J. H. Field, Crisostomo Sciacca, Marco Pieri, C. Y. Chien, O. Adriani, R. Bock, Francesca Nessi-Tedaldi, Gerard Fernandez, H. Suter, S. Easo, G. H. Wang, I. Vetlitsky, D. DiBitonto, Z. Z. Xu, J. Wenninger, I. Clare, J. Busenitz, V. Plyaskin, Ph. Rosselet, L. Djambazov, M. Vivargent, M. Sachwitz, A. Kirkby, Lucas Taylor, H. El Mamouni, V. Koutsenko, M. Steuer, G. Forconi, J. D. Burger, V. Pojidaev, W. van Rossum, Jozsef Toth, L. Baksay, J. Weber, E. Drago, David Stickland, A. Marin, P. J. Li, Konrad Deiters, Bolek Wyslouch, Chenjie Gu, A. Zichichi, Alberto Aloisio, A. Ricker, T. Azemoon, P. Lebrun, F. Plasil, H. F. Chen, A. Buytenhuijs, P. Arce, Z. F. Gong, Elisabetta Gallo, D. Goujon, P. Berges, M. T. Dova, D. Perret-Gallix, Adrian Biland, G. Rahal-Callot, J. M. Ma, A. Böhm, A. Pevsner, Qi An, BT Bouwens, T. Paul, Marcos Cerrada, H. R. Dimitrov, O. Fackler, X. R. Shi, Felicitas Pauss, Y. Mi, Samuel C.C. Ting, H. O. Cohn, S. C. Tonwar, Frank Filthaut, Thomas Ferguson, Mingshui Chen, S. Rosier-Lees, X. W. Tang, S. J. Fan, Chenliang Wang, Vincenzo Innocente, Maurizio Biasini, A. C. Weber, I. Sheer, L. Urbán, P. A. Piroué, B. Zhou, W. Kittel, P. Le Coultre, F. Ferroni, U. Uwer, Marta Felcini, J. G. Xu, B. C.C. van der Zwaan, Yu. Galaktionov, G. Passaleva, J. A. Rubio, K. Schultze, X. T. Cui, A. Chen, Y. Zeng, M. Fukushima, J. Salicio, M. Lenti, Stefan Roth, A. Kasser, Guofan Hu, Christoph Paus, D. Gele, J. Alcaraz, Elemer Nagy, M. Bosetti, A. Sopczak, D. Lanske, K. Hangarter, Pablo Garcia-Abia, Alain Hervé, A. Nadtochy, M. Pauluzzi, L. Romero, Francesco Becattini, A. Engler, G. Chiefari, S. Shevchenko, A. Bay, S. Reucroft, Wt Lin, J. M. Le Goff, M. Capell, J. C. Sens, Cheng Chen, T. E. Coan, J. G. Branson, D. H. Wright, Carlo Civinini, R. Leiste, B. Monteleoni, F. Sticozzi, M. Maolinbay, G. Mirabelli, G. S. Sanders, M. Fabre, H. Janssen, M. Bourquin, M. Schneegans, D. M. Lee, C. Spartiotis, J. K. Kim, R. Starosta, W. J. Burger, C. Zaccardelli, K. Strauch, G. Raven, S. N. Ganguli, P. G. Seiler, F. Behner, M. Aguilar-Benitez, Andrea Baschirotto, S. Shotkin, D. Ren, R. Morand, D. Luckey, Z. L. Xue, W. W. Kinnison, S. C. Yeh, Gy L. Bencze, Herwig Schopper, Howard A. Stone, E. Gonzalez, Davide Piccolo, Reinhard W. Schulte, Z. W. Yin, H. Kuijten, A. Degré, K. Lübelsmeyer, J. Shukla, M. N. Kienzle-Focacci, R. Rosmalen, H. Postema, M. White, P. Kapinos, P. Duinker, A. A. Syed, Piero Spillantini, C. F. He, U. Vikas, A. Tsaregorodtsev, K. N. Qureshi, S. Goldfarb, S. Lanzano, S. Schulte, M. Rattaggi, A. Gougas, C. Leggett, M. Rescigno, Georgi Sultanov, J. Mnich, T. S. Dai, R. A. Khan, M. Guanziroli, Y. Mir, C. H. Ye, Peter Denes, S. Wynhoff, A. Rubbia, T. Foreman, A. Nippe, D. Duchesneau, Alexander Malinin, B.C. Stringfellow, A. Klimentov, M. Yzerman, V. R. Krastev, J. P. Martin, J. Bao, Y. G. Kim, Paolo Bagnaia, V. P. Andreev, Y. H. Chang, Kenneth Francis Read, E. Shumilov, X. L. Wang, M. Chemarin, George Alverson, Jun Guo, B. Lindemann, V. Shoutko, G. Finocchiaro, J. S. Kapustinsky, B. C. Riemers, G. M. Chen, L. Z. Sun, Marcel Merk, M. Tonutti, Igor Vorobiev, J. Perrier, M. Hebert, Panos A Razis, D. Hauschildt, R. Malik, J. M. Lubbers, Stéphane Jézéquel, Simonetta Gentile, J. Berdugo, Zhuoxiang Ren, D. J. Schotanus, J. M. You, Jianming Qian, G. Hu, G. A. Yang, Carlos Willmott, Speranza Falciano, H. T. Li, T. J. Wenaus, G. Terzi, P. Marchesini, Ming Zeng, D.W. Schmitz, G. Pascale, G.G.G. Massaro, M. Röhner, G. M. Bilei, Andrea Contin, Claudio Luci, Robert Clare, S. Patricelli, W. G. Ma, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, R. T. Van de Walle, Q. Ye, I. Scott, L. Fredj, M. Napolitano, L. J. Gutay, U. Becker, E. Valente, D. McNally, I. Duran, H. S. Chen, L. Servoli, F. J. Eppling, G. J. Zhou, L. W. Jones, X. Leytens, G. Viertel, D. S. Yan, S. M. Ting, Hans J. Vogel, S. Morganti, J. Schwenke, X. Y. Cui, W. Y. Chen, L. Martinez-Laso, A. Atamanchuk, M. S. Sarakinos, Marcella Diemoz, N. Yunus, G. Gratta, G. Landi, M. L. Brooks, Simone Paoletti, Manjit Kaur, C. Dionisi, Daqiang Zhang, Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. L., Andreev, V. P., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., P. V. K., Bagnaia, P., Bakken, J. A., Baksay, L., Ball, R. C., Banerjee, S., Bao, J., Barillere, R., Barone, L., Baschirotto, A., Battiston, R., Bay, A., Becattini, F., Bechtluft, J., Becker, R., Becker, U., Behner, F., Behrens, J., Bencze, G. L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Biasini, M., Biland, A., Bilei, G. M., Bizzarri, R., Blaising, J. J., Bobbink, G. J., Bock, R., Bohm, A., Borgia, B., Bosetti, M., Bourilkov, D., Bourquin, M., Boutigny, D., Bouwens, B., Brambilla, E., Branson, J. G., Brock, I. C., Brooks, M., Bujak, A., Burger, J. D., Burger, W. J., Busenitz, J., Buytenhuijs, A., Cai, X. D., Capell, M., Caria, M., Carlino, G., Cartacci, A. M., Castello, R., Cerrada, M., Cesaroni, F., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, C., Chen, G. M., Chen, H. F., Chen, H. S., Chen, M., Chen, W. Y., Chiefari, Giovanni, Chien, C. Y., Choi, M. T., Chung, S., Civinini, C., Clare, I., Clare, R., Coan, T. E., Cohn, H. O., Coignet, G., Colino, N., Contin, A., Cui, X. T., Cui, X. Y., Dai, T. S., Dalessandro, R., Deasmundis, R., Degre, A., Deiters, K., Denes, E., Denes, P., Denotaristefani, F., Dhina, M., Dibitonto, D., Diemoz, M., Dimitrov, H. R., Dionisi, C., Djambazov, L., Dova, M. T., Drago, E., Duchesneau, D., Duinker, P., Duran, I., Easo, S., Elmamouni, H., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabbretti, R., Fabre, M., Falciano, S., Fan, S. J., Fackler, O., Fay, J., Felcini, M., Ferguson, T., Fernandez, D., Fernandez, G., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J., Filthaut, F., Finocchiaro, G., Fisher, P. H., Forconi, G., Foreman, T., Fredj, L., Freudenreich, K., Friebel, W., Fukushima, M., Gailloud, M., Galaktionov, Y., Gallo, E., Ganguli, S. N., Garciaabia, P., Gele, D., Gentile, S., Goldfarb, S., Gong, Z. F., Gonzalez, E., Gougas, A., Goujon, D., Gratta, G., Gruenewald, M., Gu, C., Guanziroli, M., Guo, J. K., Gupta, V. K., Gurtu, A., Gustafson, H. R., Gutay, L. J., Hangarter, K., Hartmann, B., Hasan, A., Hauschildt, D., C. F., He, J. 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S., Lu, Lubbers, J. M., Lubelsmeyer, K., Luci, C., Luckey, D., Ludovici, L., Luminari, L., Lustermann, W., J. M., Ma, W. G., Ma, Macdermott, M., Malhotra, P. K., Malik, R., Malinin, A., Mana, C., Maolinbay, M., Marchesini, P., Marion, F., Marin, A., Martin, J. P., Martinezlaso, L., Marzano, F., G. G. G., Mazumdar, K., Mcbride, P., Mcmahon, T., Mcnally, D., Merk, M., Merola, Leonardo, Meschini, M., Metzger, W. J., Mi, Y., Mills, G. B., Mir, Y., Mirabelli, G., Mnich, J., Moller, M., Monteleoni, B., Morand, R., Morganti, S., Moulai, N. E., Mount, R., Muller, S., Nadtochy, A., Nagy, E., Napolitano, Marco, Nessitedaldi, F., Newman, H., Neyer, C., Niaz, M. A., Nippe, A., Nowak, H., Organtini, G., Pandoulas, D., Paoletti, S., Paolucci, P., Pascale, G., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pei, Y. J., Pensotti, S., Perretgallix, D., Perrier, J., Pevsner, A., Piccolo, D., Pieri, M., Piroue, P. 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R., Shumilov, E., Shoutko, V., Son, D., Sopczak, A., Spartiotis, C., Spickermann, T., Spillantini, P., Starosta, R., Steuer, M., Stickland, D. P., Sticozzi, F., Stone, H., Strauch, K., Stringfellow, B. C., Sudhakar, K., Sultanov, G., Sun, L. Z., Susinno, G. F., Suter, H., Swain, J. D., Syed, A. A., Tang, X. W., Taylor, L., Terzi, G., S. C. C., Ting, S. M., Tonutti, M., Tonwar, S. C., Toth, J., Tsaregorodtsev, A., Tsipolitis, G., Tully, C., Tung, K. L., Ulbricht, J., Urban, L., Uwer, U., Valente, E., Vandewalle, R. T., Vetlitsky, I., Viertel, G., Vikas, P., Vikas, U., Vivargent, M., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Vuilleumier, L., Wadhwa, M., Wallraff, W., Wang, C., Wang, C. R., Wang, G. H., Wang, X. L., Wang, Y. F., Wang, Z. M., Warner, C., Weber, A., Weber, J., Weill, R., Wenaus, T. J., Wenninger, J., White, M., Willmott, C., Wittgenstein, F., Wright, D., S. X., Wu, Wynhoff, S., Wyslouch, B., Xie, Y. Y., J. G., Xu, Z. Z., Xu, Xue, Z. L., Yan, D. S., Yang, B. Z., Yang, C. G., Yang, G., C. H., Ye, J. B., Ye, Ye, Q., Yeh, S. C., Yin, Z. W., You, J. M., Yunus, N., Yzerman, M., Zaccardelli, C., Zemp, P., Zeng, M., Zheng, Y., Zhang, D. H., Zhang, Z. P., Zhou, B., Zhou, G. J., Zhou, J. F., Zhu, R. Y., Zichichi, A., B. C. C., Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, and IHEF (IoP, FNWI)
Subjects: Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Hadron, Elementary particle, 7. Clean energy, 01 natural sciences, Standard Model, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, Mixing (physics), Physics, electroweak interaction, 010308 nuclear & particles physics, Electroweak interaction, High Energy Physics::Phenomenology, Física, z boson, Weinberg angle, lcsh:QC1-999, High Energy Physics::Experiment, Particle Physics - Experiment, lcsh:Physics, Lepton
Abstract: The effective electroweak mixing angle sin2θw is measured from the production and decay of the Z boson in e+e- interactions. The data sample corresponds to an integrated luminosity of 18 pb-l with about 420 000 hadronic and 40 000 leptonic Z decays. The mixing angle sin 22θw is determined from several independent measurements: the leptonic and hadronic cross sections, the forward-backward asymmetries of charged leptons and b-quarks, and the z-polarization. The results are found to be in good agreement with each other. The value of sin 22θw from a fit to the asymmetries in a model independent method is 0.2321-4-0.0021 and from a global fit to the data in the Standard Model framework is 0.2328±0.0013., Facultad de Ciencias Exactas
Published: 1993
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50. Measurement of from hadronic decays of the Z

Author: W. van Rossum, Adrian Biland, D. Antreasyan, B. N. Jin, Yu. Kamyshkov, M. Brooks, S. J. Fan, Mw Gruenewald, H. Nowak, Qi An, A. A. Syed, H. Anderhub, A. Engler, X. F. Wang, M. Capell, M. Rescigno, D.W. Schmitz, G.G.G. Massaro, H. Janssen, K. S. Kumar, P. Duinker, Claudio Luci, W. Wallraff, H. S. Fesefeldt, Robert Clare, J. P. Martin, W. G. Ma, Thomas Hebbeker, Paul Lecoq, M. Yzerman, Zheng Wang, V. R. Krastev, Jun Guo, B. Lindemann, M. Napolitano, Raffaello D'Alessandro, Dong-Chul Son, T. Kramer, A. Klimentov, P. Zemp, R. de Asmundis, G. Finocchiaro, S. Banerjee, B. Ille, J. Mnich, P. Vikas, A. Rubbia, T. Foreman, J. J. Blaising, Stefan Kirsch, G. Tsipolitis, Kenneth Francis Read, J. Bao, X. R. Shi, Marcel Merk, Leonardo Merola, H. S. Chen, Maurizio Biasini, Marta Felcini, K. N. Qureshi, S. Goldfarb, F. J. Rodriguez, J. Perrier, R. Leiste, Christoph Paus, S. Easo, A. Gougas, L. Servoli, M. Schneegans, Felicitas Pauss, V. Plyaskin, D. Hauschildt, T. Azemoon, U. Becker, I. Vetlitsky, Francesco Becattini, K. Sudhakar, B. Monteleoni, F. Sticozzi, G. Fernandez, An.A. Vorobyov, T. Paul, Marcos Cerrada, G. Landi, Simone Paoletti, Y. Mi, R. Malik, C. Spartiotis, D. P. Stickland, S. Rosier-Lees, Y. Mir, C. H. Ye, Y. J. Pei, J. M. Lubbers, H. J. Schreiber, G. Schwering, Manjit Kaur, Daqiang Zhang, Tariq Aziz, Jianming Qian, J. Alcaraz, R. Morand, Z. L. Xue, P. Le Coultre, Lucas Taylor, A. Arefiev, D. Goujon, J. M. Ma, Vincenzo Innocente, A. Kasser, Guofan Hu, S. Schulte, G. Hu, J. B. Ye, Zhuoxiang Ren, Dimitri Bourilkov, M. Wadhwa, Howard A. Stone, M. T. Choi, Francesca Nessi-Tedaldi, C. Willmott, H. F. Chen, P. Lebrun, Roberto Battiston, Cheng Chen, W. J. Burger, Z. D. Oi, M. T. Dova, M. S. Sarakinos, K. Hangarter, D. J. Schotanus, J. M. You, A. Sopczak, J. D. Burger, D. Luckey, C. Zaccardelli, M. G. Alviggi, Zhiqing Zhang, M. Bosetti, W. W. Kinnison, S. Wynhoff, Gerjan Bobbink, B. Borgia, V. K. Gupta, G. Rahal-Callot, J. Ulbricht, Pierluigi Paolucci, M. Gailloud, G. Carlino, J. G. Branson, R. Bizzarri, Ren-Yuan Zhu, Luciano Barone, Speranza Falciano, G. A. Yang, F. DeNotaristefani, M. Möller, H. O. Cohn, Jozsef Toth, J. S. Kapustinsky, D. Pandoulas, H. T. Li, K. Schultze, P. Spillantini, J. K. Kim, R. Starosta, S. Lanzano, H. Suter, D. Lanske, I. Clare, A. Buytenhuijs, Elisabetta Gallo, P. Berges, Sc Yeh, Gy L. Bencze, A. Degré, Wt Lin, Crisostomo Sciacca, Marco Pieri, Reinhard W. Schulte, E. Dénes, R. Sehgal, C. Yang, H. R. Gustafson, Marcella Diemoz, X. T. Cui, G. Chiefari, G. M. Bilei, S. Shevchenko, Yu. Galaktionov, C. R. Wang, M. Bourquin, D. Gele, F. Behner, K. Strauch, M. Rattaggi, Andrea Contin, N. E. Moulai, E. Fiandrini, S. Reucroft, A. Nippe, D. Duchesneau, Andrea Baschirotto, Alexander Malinin, L. Martinez-Laso, S. Shotkin, P. Kapinos, A. Gurtu, Els Koffeman, M. Caria, F. C. Erné, Konrad Deiters, Alberto Aloisio, A. Ricker, E. Drago, S. Patricelli, Y. G. Kim, A. Koulbardis, Roberto Castello, S. Gentile, Y. H. Chang, George Alverson, R. Barillère, R. W. Kraemer, V. Koutsenko, Q. Ye, E. Brambilla, B. Stringfellow, A. Hasan, G. Sauvage, L. Z. Sun, L. Djambazov, W. Y. Chen, G. Terzi, P. Marchesini, Ming Zeng, G. Herten, K. Riles, C. Dionisi, G. Passaleva, W. Friebel, M. Röhner, B. P. Roe, O. Rind, P. Arce, Kajari Mazumdar, Harvey B Newman, N. Yunus, S. P. Ahlen, D. Z. Shen, C. Li, J. A. Bakken, G. Gratta, J. Behrens, M. Sassowsky, X. W. Tang, I. Sheer, P. A. Piroué, B. Zhou, B. C.C. van der Zwaan, K. Hilgers, Georgi Sultanov, Fl Linde, T. S. Dai, R. A. Khan, A. Bujak, Oliver Kornadt, M. Pohl, P. J. Li, L. J. Gutay, V. P. Andreev, M. Vivargent, M. Sachwitz, I. Duran, M. Chemarin, G. M. Chen, H. Vogt, F. J. Eppling, G. J. Zhou, L. W. Jones, R. T. Van de Walle, D. S. Yan, F. Ferroni, S. M. Ting, Y. Zeng, F. Marzano, G. Coignet, T. E. Coan, W. Krenz, BT Bouwens, I. Scott, E. Valente, Yuehong Xie, C. Maña, D. McNally, U. Uwer, X. Leytens, G. Viertel, S. Khokhar, T.R. McMahon, S. Müller, A. Chen, J. Salicio, Hans J. Vogel, S. Morganti, J. Schwenke, X. Y. Cui, A. Atamanchuk, P. Schmitz, Pablo Garcia-Abia, Alain Hervé, K. Freudenreich, U. K. Chaturvedi, Z. W. Yin, Y. S. Lu, A. Bay, I. C. Brock, S. X. Wu, Carlo Civinini, M. Maolinbay, G. Raven, Jérôme Rose, J. H. Field, C. Y. Chien, Xd Cai, D. DiBitonto, Ph. Rosselet, A. Kirkby, M. Aguilar-Benitez, M. Steuer, G. Forconi, Herwig Schopper, J. Weber, D. Perret-Gallix, Samuel C.C. Ting, H. Postema, M. White, S. Röhner, F. Wittgenstein, L. Ludovici, O. Adrian, A. Marin, H. R. Dimitrov, O. Fackler, L. Urbán, J. G. Xu, M. Fukushima, M. Lenti, J. M. Le Goff, D. H. Wright, C. Leggett, M. Guanziroli, S. Roth, P. G. Seiler, J. A. Rubio, F. Cesaroni, J. Y. Liao, B. L. Betev, Emilio Leonardi, R. Bock, L. Baksay, A. Pevsner, E. Shumilov, V. Shoutko, B. C. Riemers, R. Mount, D. Fernandez, J. Berdugo, Z. F. Gong, G. B. Mills, W. Kittel, E. Nagy, M. Fabre, M. Tonutti, Igor Vorobiev, H. Kuijten, M. Hebert, M. N. Kienzle-Focacci, R. Rosmalen, Panos A Razis, A. Tsaregorodtsev, Davide Piccolo, Stéphane Jézéquel, F. Plasil, E. Gonzalez, Mingshui Chen, X. L. Wang, M. Pauluzzi, H. El Mamouni, Marco Meschini, G. S. Sanders, D. Kirkby, Christopher George Tully, D. Ren, Wolfgang Lohmann, J. M. Salicio, B. Bertucci, S. C. Kim, Nicanor Colino, R. Weill, U. Vikas, S. C. Tonwar, Frank Filthaut, A. L. Anderson, F. Marion, A. Nadtochv, J. Busenitz, J. F. Zhou, Peter Denes, Paolo Bagnaia, Egidio Longo, M. M. Ilyas, G. Pascala, M. MacDermott, Giovanni Ambrosi, T. Spickermann, M. A. Niaz, Luciano Romero, Bolek Wyslouch, Chenjie Gu, C. F. He, P. Extermann, D. M. Lee, Christoph Schäfer, I. Leedom, B. Z. Yang, H. Hofer, K. L. Tung, L. Antonov, P. K. Malhotra, H. A. Rizvi, A. Kunin, Hafeez R Hoorani, W. J. Metzger, J. T. He, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Ph Fisher, H. Rykaczewski, Giovanni Organtini, Chen Wang, Y. Karyotakis, S. Chung, P.V.K.S. Baba, Attilio Santocchia, Jean Fay, S. N. Ganguli, M. Dhina, D. Boutigny, Z. Y. Lin, J. D. Swain, P. McBride, T. Fergusson, A. Böhm, Lamberto Luminari, T. J. Wenaus, R. C. Ball, Pierre Lecomte, G. Sartorelli, Werner Lustermann, A. C. Weber, R. Fabbretti, Luca Lista, Yanwen Liu, G. Mirabelli, Sabine Riemann, K. Lübelsmeyer, A. Krivshich, J. C. Sens, A. M. Cartacci, R. Raghavan, A. C. König, Laurent Vuilleumier, G. H. Wang, S. Bachmann, Z. Z. Xu, J. Wenninger, V. Pojidaev, R. Schukla, C. Neyer, and P. G. Rancoita
Subjects: Nuclear physics, Physics, Hadronic decay, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Hadron, 010306 general physics, 01 natural sciences
Abstract: We report a measurement of R b = Γ b b Γ had from Z → q q events at LEP. Z → b b events are identified using a multidimensional analysis based on a neural network approach. We obtain 60% sample purity with an efficiency of 35%. Our measured value of R b is 0.222±0.003±0.007.
Published: 1993
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