Chang,Wen-Chen / Research Fellow

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Contact Information

Education

  • Ph. D., SUNY at Stony Brook, U.S

Secretary

Su, Jing-Xuan / 886-2-2789-6784

Research Interest

  • Quark Nuclear Physics
  • Hadron Physics
  • Relativistic Heavy Ion Collisions

Experience

  • Associate Research Fellow, Academia Sinica (2004-2015)
  • Assitant Research Fellow, Academia Sinica (1999-2004)

Publication

Journal Papers

  • [1]     J. Dove at al. SeaQuest/E906 Collaboration, 2021, “The asymmetry of antimatter in the proton”, Nature, 590(7847), 561-565. (SCIE) (IF: 42.779; SCI ranking: 1.4%)

  • [2]     Lyu Yang, Chang Wen-Chen, McClellan Randall Evan, Peng Jen-Chieh, Teryaev Oleg, 2021, “Lepton angular distribution of W boson productions”, Physical Review D, 103(3), 034011. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [3]     G.D. Alexeev et al. COMPASS Collaboration, 2021, “Spin density matrix elements in exclusive meson muoproduction”, The European Physical Journal C, 81(2), 126. (SCIE) (IF: 4.389; SCI ranking: 24.1%)

  • [4]     Chang Wen-Chen, Peng Jen-Chieh, Platchkov Stephane, Sawada Takahiro, 2020, “Constraining gluon density of pions at large x by pion-induced J/ψ production”, Physical Review D, 102(5). (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [5]     N. Muramatsu et al. LEPS Collaboration, 2020, “Differential cross sections, photon beam asymmetries, and spin density matrix elements of ω photoproduction off the proton at Eγ=1.3−2.4 GeV”, Physical Review C, 102(2). (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [6]     G.D. Alexeev et al. COMPASS Collaboration, 2020, “Antiproton over proton and K− over K+ multiplicity ratios at high z in DIS”, Physics Letters B, 807 135600. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [7]     J. Agarwala et al. COMPASS Collaboration, 2020, “Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS”, Nuclear Physics B, 956 115039. (SCIE) (IF: 2.817; SCI ranking: 34.5%)

  • [8]     G.D. Alexeev et al. COMPASS Collaboration, 2020, “Measurement of the cross section for hard exclusive π0 muoproduction on the proton”, Physics Letters B, 805 135454. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [9]     N. Tomida et al. LEPS2/BGOegg Collaboration, 2020, “Search for η′ Bound Nuclei in the C12(γ,p) Reaction with Simultaneous Detection of Decay Products”, Physical Review Letters, 124(20) , 202501. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [10]     N. Muramatsu et al. LEPS Collaboration, 2019, “Measurement of neutral pion photoproduction off the proton with the large acceptance electromagnetic calorimeter BGOegg”, Physical Review C, 100(5). (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [11]     Peng Jen-Chieh, Chang Wen-Chen, McClellan Randall Evan, Teryaev Oleg, 2019, “Lepton angular distribution of Z boson production and jet discrimination”, Physics Letters B, 797 134895. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [12]     A. Adare et al. PHENIX Collaboration, 2019, “Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions”, Physical Review Letters, 123(2) 022301. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [13]     R. Akhunzyanov et al. COMPASS Collaboration, 2019, “Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section”, Physics Letters B, 793, 188-194. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [14]     C.A. Aidala et al. SeaQuest Collaboration, 2019, “The SeaQuest spectrometer at Fermilab”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 930, 49-63.

  • [15]     Watanabe K., Tanaka S., Chang W.C., Chen H., Chu M.L., Cuenca-García J.J., Gogami T., González-Díaz D., Niiyama M., Ohashi Y., Ohnishi H., Tomida N., Yosoi M., 2019, “A compensated multi-gap RPC with 2 m strips for the LEPS2 experiment”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 925, 188-192.

  • [16]     Chang Wen-Chen, McClellan Randall Evan, Peng Jen-Chieh, Teryaev Oleg, 2019, “Lepton angular distributions of fixed-target Drell-Yan experiments in perturbative QCD and a geometric approach”, Physical Review D, 99(1), 014032. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [17]     M.G. Alexeev et al. COMPASS Collaboration, 2018, “Measurement of P-weighted Sivers asymmetries in leptoproduction of hadrons”, Nuclear Physics B, 940, 34-53. (SCIE) (IF: 2.817; SCI ranking: 34.5%)

  • [18]     Peng Jen-Chieh, Boer Daniël, Chang Wen-Chen, McClellan Randall Evan, Teryaev Oleg, 2018, “On the rotational invariance and non-invariance of lepton angular distributions in Drell–Yan and quarkonium production”, Physics Letters B, 789, 356-359. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [19]     R. Akhunzyanov et al. COMPASS Collaboration, 2018, “K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy”, Physics Letters B, 786 390-398. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [20]     M. Aghasyan et al. COMPASS Collaboration, 2018, “Light isovector resonances in π−p→π−π−π+p at 190  GeV/c”, Physical Review D, 98(9). (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [21]     C. Adolph et al. COMPASS Collaboration, 2018, “Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons”, The European Physical Journal C, 78(11). (SCIE) (IF: 4.389; SCI ranking: 24.1%)

  • [22]     M. Aghasyan et al. COMPASS Collaboration, 2018, “Search for muoproduction of X (3872) at COMPASS and indication of a new state X˜(3872)”, Physics Letters B, 783, 334-340. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [23]     H. Kohri, S.H. Shiu, W.C. Chang, Y. Yanai et al. LEPS Collaboration, 2018, “Differential Cross Section and Photon-Beam Asymmetry for the γ→p → π−Δ++(1232) Reaction at Forward π− Angles for Eγ=1.5–2.95  GeV”, Physical Review Letters, 120(20), 202004. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [24]     M. Aghasyan et al. COMPASS Collaboration, 2018, “Longitudinal double-spin asymmetry A1p and spin-dependent structure function g1p of the proton at small values of x and Q 2”, Physics Letters B, 781, 464-472. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [25]     T. Hiraiwa et al. LEPS Collaboration, 2018, “First measurement of coherent ϕ -meson photoproduction from He4 near threshold”, Physical Review C, 97(3), 035208. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [26]     M. Aghasyan et al. COMPASS Collaboration, 2018, “New analysis of ηπ tensor resonances measured at the COMPASS experiment”, Physics Letters B, 779, 464-472. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [27]     M. Aghasyan et al. COMPASS Collaboration, 2018, “Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering”, Physical Review D, 97(3), 032006. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [28]     H. Kohri, S.Y. Wang, S.H. Shiu, W.C. Chang, Y. Yanai et al. LEPS Collaboration, 2018, “Differential cross section and photon-beam asymmetry for the γ⃗p→π+n reaction at forward π+ angles at Eγ=1.5 –2.95 GeV”, Physical Review C, 97, 015205. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [29]     S.H. Shiu, H. Kohri, W.C. Chang et al. LEPS Collaboration, 2018, “Photoproduction of Λ and Σ0 hyperons off protons with linearly polarized photons at Eγ=1.5–3.0 GeV”, Physical Review C, 97(1), 015208. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [30]     K. Mizutani et al. LEPS Collaboration, 2017, “ϕ photoproduction on the proton at Eγ=1.5–2.9GeV”, Physical Review C, 96, 062201. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [31]     Chang Wen-Chen, McClellan Randall Evan, Peng Jen-Chieh, Teryaev Oleg, 2017, “Dependencies of lepton angular distribution coefficients on the transverse momentum and rapidity of Z bosons produced in pp collisions at the LHC”, Physical Review D, 96(5), 054020. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [32]     M. Aghasyan et al. COMPASS Collaboration, 2017, “First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process”, Physical Review Letters, 119(11), 112002. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [33]     A. Adare et al. PHENIX Collaboration, 2017, “Measurements of e+e− pairs from open heavy flavor in p+p and d+A collisions at sNN=200 GeV”, Physical Review C, 96(2), 024907. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [34]     C. Adolph et al. COMPASS Collaboration, 2017, “First measurement of the Sivers asymmetry for gluons using SIDIS data”, Physics Letters B, 772, 854-864. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [35]     C. Adolph et al. COMPASS Collaboration, 2017, “Sivers asymmetry extracted in SIDIS at the hard scales of the Drell–Yan process at COMPASS”, Physics Letters B, 770, 138-145. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [36]     C. Adolph et al. COMPASS Collaboration, 2017, “Leading-order determination of the gluon polarisation from semi-inclusive deep inelastic scattering data”, EUROPEAN JOURNAL OF PHYSICS, 77, 209. (SCIE) (IF: 0.756; SCI ranking: 81.2%,88.1%)

  • [37]     C. Adolph et al. COMPASS Collaboration, 2017, “Final COMPASS results on the deuteron spin-dependent structure function g1d and the Bjorken sum rule”, PHYSICS LETTERS B, 769, 34-41. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [38]     C. Adolph et al. COMPASS Collaboration, 2017, “Resonance production and ππ S -wave in π−+p→π−π−π++precoil at 190  GeV/c”, Physical Review D, 95(3), 032004. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [39]     C. Adolph et al. COMPASS Collaboration, 2017, “Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target”, Physics Letters B, 767, 133-141. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [40]     C. Adolph et al. COMPASS Collaboration, 2016, “Exclusive ω meson muoproduction on transversely polarised protons”, Nuclear Physics B, 915, 454-475. (SCIE) (IF: 2.817; SCI ranking: 34.5%)

  • [41]     C. Adolph et al. COMPASS Collaboration, 2016, “Multiplicities of charged pions and charged hadrons from deep-inelastic scattering of muons off an isoscalar target”, PHYSICS LETTERS B, 764, 1. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [42]     T. Sawada, W.C. Chang, S. Kumano, J.C. Peng, S. Sawada and K. Tanaka, 2016, “Accessing proton generalized parton distributions and pion distribution amplitudes with the exclusive pion-induced Drell-Yan process at J-PARC”, PHYSICAL REVIEW D, 93, 114034 (2016). (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [43]     S.Y. Ryu et al. LEPS Collaboration, 2016, “Interference effect between φ and Λ(1520) production channels in the γp→K + K − p reaction near threshold”, PHYSICAL REVIEW LETTERS, 116, 232001. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [44]     J.C. Peng, W.C. Chang, R.E. McClellan and O. Teryaev, 2016, “Interpretation of Angular Distributions of Z-boson Production at Colliders”, PHYSICS LETTERS B, 758, 384-388. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [45]     D.J. Yang, F.J. Jiang, W.C. Chang, C.W. Kao and S.i. Nam, 2016, “Consistency check of charged hadron multiplicities and fragmentation functions in SIDIS”, PHYSICS LETTERS B, 755, 393-402. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [46]     W.C. Chang, S. Kumano and T. Sekihara, 2016, “Constituent-counting rule in photoproduction of hyperon resonances”, PHYSICAL REVIEW D, 93, 034006. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [47]     C. Adolph et al. COMPASS Collaboration, 2015, “Interplay among transversity induced asymmetries in hadron leptoproduction ”, PHYSICS LETTERS B, 753, 406-411. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [48]     C. Adolph et al. COMPASS Collaboration, 2015, “Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high pT ”, PHYSICS LETTERS B, 753, 573-579. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [49]     C. Adolph et al. COMPASS Collaboration, 2015, “The spin structure function g1p of the proton and a test of the Bjorken sum rule”, PHYSICS LETTERS B, 753, 18. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [50]     A. Adare et al. PHENIX Collaboration, 2015, “Measurements of elliptic and triangular flow in high-multiplicity 3He+Au collisions at sqrt(s)NN=200 GeV”, PHYSICAL REVIEW LETTERS, 115, 142301. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [51]     W.C. Chang and J.C. Peng, 2015, “Extraction of the intrinsic light-quark sea in the proton”, PHYSICAL REVIEW D, 92, 054020. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [52]     S.H. Shiu, J.Y. Wu, R.E. McClellan, T.H. Chang, W.C. Chang, Y.C. Chen, R. Gilman, K. Nakano, J.C. Peng, S.Y. Wang, 2015, “FPGA-based Trigger System for the Fermilab SeaQuest Experiment”, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 802, 82. (SCIE) (IF: 1.265; SCI ranking: 76.6%,86.2%,52.9%,84.2%)

  • [53]     C. Adolph et al. COMPASS Collaboration, 2015, “Observation of a New Narrow Axial-Vector Meson a1(1420)”, PHYSICAL REVIEW LETTERS, 115, 082001. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [54]     A. Adare et al. PHENIX Collaboration, 2015, “Search for dark photons from neutral meson decays in p+pand d+Au collisions at sqrt(s)NN= 200 GeV”, PHYSICAL REVIEW C, 91, 031901. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [55]     A. Adare et al. PHENIX Collaboration, 2015, “Measurement of Υ (1S+2S+3S) production in p + p and Au+ Au collisions at sqrt(s)NN= 200 GeV”, PHYSICAL REVIEW C, 91, 024913. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [56]     Y. Morino et al. LEPS Collaboration, 2015, “Backward-angle photoproduction of ω and η′ mesons from protons at Eγ=1.5−3.0 GeV”, Progress of Theoretical and Experimental Physics, 013D01. (SCIE) (IF: 2.091; SCI ranking: 55.2%,43.5%)

  • [57]     S.Y. Wang, J.Y. Wu, S.H. Yao, and W.C. Chang, 2014, “A Field-Programmable Gate Array (FPGA) TDC for Fermilab SeaQuest (E906) Experiment and its Test with a Novel External Wave Union Launcher”, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 61, 3592. (SCIE) (IF: 1.575; SCI ranking: 65.8%,26.5%)

  • [58]     Wen-Chen Chang and Jen-Chieh Peng, 2014, “Flavor structure of the nucleon sea”, PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 79, 95-135. (SCIE) (IF: 13.421; SCI ranking: 6.9%,5.3%)

  • [59]     J.C. Peng, W.C. Chang, H.Y. Cheng, T.J. Hou, K.F. Liu and J.-W. Qiu, 2014, “On the momentum dependence of the flavor structure of the nucleon sea”, PHYSICS LETTERS B, 736, 411. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [60]     A. Adare et al. PHENIX Collaboration, 2014, “Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at sqrt(s)=200 and 62.4 GeV ”, PHYSICAL REVIEW D, 90, 012006. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [61]     N. Tomida, M. Niiyama, H. Ohnishi, N. Tran, C.-Y. Hsieh, M.-L. Chu, W.-C. Chang, J.-Y. Chen, 2014, “Large strip RPCs for the LEPS2 TOF system”, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 766, 283. (SCIE) (IF: 1.265; SCI ranking: 76.6%,86.2%,52.9%,84.2%)

  • [62]     A. Adare et al. PHENIX Collaboration, 2014, “Transverse-energy distributions at midrapidity in p+p, d+Au, and Au+Au collisions at sqrt(s)NN=62.4—200 GeV and implications for particle-production models”, PHYSICAL REVIEW C, 89, 044905. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [63]     A. Adare et al. PHENIX Collaboration, 2014, “Heavy-flavor electron-muon correlations in p + p and d +Au collisions at sqrt(s)NN= 200 GeV”, PHYSICAL REVIEW C, 89, 034915. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [64]     A.O. Tokiyasu et al. LEPS Collaboration, 2014, “Search for K^-pp bound state via γd \rightarrow K^+ π^-X reaction at E_γ=1.5-2.4 GeV”, PHYSICS LETTERS B, 728: 616-621. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [65]     A. Adare et al. PHENIX Collaboration, 2013, “Inclusive cross section and single transverse spin asymmetry for very forward neutron production in polarized p+p collisions at sqrt(s)=200  GeV”, PHYSICAL REVIEW D, 88, 032006. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [66]     W.C. Chang and D. Dutta, 2013, “THE PIONIC DRELL–YAN PROCESS: A BRIEF SURVEY”, INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS, 22, 1330020.

  • [67]     A. Adare et al. PHENIX Collaboration, 2013, “Medium Modification of Jet Fragmentation in Au+Au Collisions at sqrt(s) NN =200  GeV Measured in Direct Photon-Hadron Correlations”, PHYSICAL REVIEW LETTERS, 111, 032301. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [68]     A. Adare et al. PHENIX Collaboration, 2013, “Direct photon production in d+Au collisions at sqrt(s) NN=200 GeV”, PHYSICAL REVIEW C, 87, 054907. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [69]     A. Adare et al. PHENIX Collaboration, 2013, “Y(1S+2S+3S) production in d+Au and p+p collisions at sqrt(s)=200 GeV and cold-nuclear-matter effects.”, PHYSICAL REVIEW C, 87, 044909. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [70]     W.C. Chang, I.C. Cloet, D. Dutta and J.C. Peng, 2013, “Probing flavor-dependent EMC effect with W-boson production”, PHYSICS LETTERS B, 720, 188. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [71]     W. C. Chang, 2013, “Recent Results from LEPS/SPring-8 Experiment”, FEW-BODY SYSTEMS, 54:171. (SCIE) (IF: 0.823; SCI ranking: 80%)

  • [72]     K.F. Liu, W.C. Chang, H.Y. Cheng, and J.C. Peng, 2012, “Connected-Sea Partons”, PHYSICAL REVIEW LETTERS, 109, 252002. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [73]     A. Adare et al. PHENIX Collaboration, 2012, “Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at sqrt(s)=62.4  GeV”, PHYSICAL REVIEW D, 86, 092006. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [74]     A. Adare et al. PHENIX Collaboration, 2012, “Direct photon production in p+p collisions at sqrt(s)=200  GeV at midrapidity.”, PHYSICAL REVIEW D, 86, 072008. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [75]     A. Adare et al. PHENIX Collaboration, 2012, “Ground and excited state charmonium production in p+p collisions at sqrt(s)=200  GeV”, PHYSICAL REVIEW D, 85, 092004. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [76]     S. H. Hwang et al. LEPS Collaboration, 2012, “Spin-Density Matrix Elements for γp→K*0Σ+ at Eγ=1.85–3.0  GeV with Evidence for the κ(800) Meson Exchange”, PHYSICAL REVIEW LETTERS, 108, 092001. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [77]     A. Adare et al. PHENIX Collaboration, 2011, “Cold Nuclear Matter Effects on J/ψ Yields as a Function of Rapidity and Nuclear Geometry in Deuteron-Gold Collisions at sqrt(s) NN=200 GeV.”, PHYSICAL REVIEW LETTERS, 107, 142301 (2011). (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [78]     W.C. Chang and J.C. Peng, 2011, “Extraction of various five-quark components of the nucleons”, PHYSICS LETTERS B, 704, 197. (SCIE) (IF: 4.384; SCI ranking: 26.5%,27.6%,21.1%)

  • [79]     A. Adare et al. PHENIX Collaboration, 2011, “Suppression of away-side jet fragments with respect to the reaction plane in Au + Au collisions at sqrt(s)NN=200 GeV”, PHYSICAL REVIEW C, 84, 024904. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [80]     Wen-Chen Chang and Jen-Chieh Peng, 2011, “Flavor Asymmetry of the Nucleon Sea and the Five-Quark Components of the Nucleons”, PHYSICAL REVIEW LETTERS, 106, 252002. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

  • [81]     A. Adare et al. PHENIX Collaboration, 2011, “Identified charged hadron production in p+p collisions at √s=200 and 62.4 GeV”, PHYSICAL REVIEW C, 83, 064903. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [82]     A. Adare et al. PHENIX Collaboration, 2011, “Azimuthal correlations of electrons from heavy-flavor decay with hadrons in p+p and Au+Au collisions at √sNN=200 GeV”, PHYSICAL REVIEW C, 83, 044912. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [83]     A. Adare et al. PHENIX Collaboration, 2011, “Measurement of neutral mesons in p+p collisions at √s=200  GeV and scaling properties of hadron production”, PHYSICAL REVIEW D, 83, 052004. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [84]     A. Adare et al. PHENIX Collaboration, 2011, “Cross section and double helicity asymmetry for η mesons and their comparison to π0 production in p+p collisions at √s=200  GeV”, PHYSICAL REVIEW D, 83, 032001. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [85]     A. Adare et al. PHENIX Collaboration, 2010, “Measurement of transverse single-spin asymmetries for J/ψ production in polarized p+p collisions at √s=200  GeV”, PHYSICAL REVIEW D, 82, 112008. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [86]     A. Adare et al. PHENIX Collaboration, 2010, “High pT direct photon and π0 triggered azimuthal jet correlations and measurement of kT for isolated direct photons in p+p collisions at √s=200  GeV”, PHYSICAL REVIEW D, 82, 072001. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [87]     W.C. Chang et al. LEPS Collaboration, 2010, “Measurement of spin-density matrix elements for ϕ-meson photoproduction from protons and deuterons near threshold”, PHYSICAL REVIEW C, 82, 015205. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [88]     A. Adare et al. PHENIX Collaboration, 2010, “Transverse momentum dependence of J/psi polarization at midrapidity in p+p collisions at s**(1/2) = 200-GeV.”, PHYSICAL REVIEW D, 82, 012001. (SCIE) (IF: 4.833; SCI ranking: 23.5%,20.7%)

  • [89]     A. Adare et al. PHENIX Collaboration, 2010, “Transverse momentum dependence of η meson suppression in Au+Au collisions at √sNN=200 GeV”, PHYSICAL REVIEW C, 82, 011902. (SCIE) (IF: 2.988; SCI ranking: 26.3%)

  • [90]     A. Adare et al. PHENIX Collaboration, 2010, “Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions.”, PHYSICAL REVIEW LETTERS, 104:252301. (SCIE) (IF: 8.385; SCI ranking: 7.1%)

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發現與突破

(1) 西元年：2018
研究人員(中)：章文箴、郡英輝、許軒豪
研究人員(英)：CHANG, WEN-CHEN, Hideki Kohri，Shiuan-Hal Shiu
研究成果名稱(中)：Δ^(++) 共振態的光致生成過程的精準量測
研究成果名稱(英)：High precision information of photo-production of Δ^(++) Resonances
簡要記述(中)：透過質子靶的 Δ^(++) 共振態的光致生成過程(γp→π^- Δ^(++))，能研究uu ̅夸克對的激發機制。反應截面和束流極化方向不對稱性的資料，將有助確認新型核子共振態和低能量強子反應的研究。利用日本SPring-8設施產生1.5-2.95 GeV背向康普頓散射的高極化線性光子，2018年5月18日， LEPS實驗組在Physics Review Letters (PRL 120, 202004 (2018)). 發表在前置方向和低能量區間的量測結果。
量測結果發現反應截面高度集中在前置方向，並透過束流極化方向不對稱性的資料確認，是符合π介子t通道交換的機制。束流極化方向不對稱性為負號，這與對應dd ̅ 和 ss ̅ 夸克對生成的π^+ 和 K^+ 光致生成過程的所量測性質相反，相類似的結果也有趣地出現在 pp 和 ep 反應生成π^- 、 π^+ 和 K^+的橫向自旋不對稱性，其中的關連性還有需進一步的探討。這項精準的資料將可提供理論上描述低能量區間強子作用模式，和新型核子共振態的確認。
簡要記述(英)：The photo-production of Δ^(++) resonances from the proton target (γp→π^- Δ^(++)) is an interesting channel of studying the uu ̅ pair excitation. The production cross sections and beam asymmetries of this process also offers important information in gauging new nucleon resonances and understanding the low-energy hadronic interactions. Such data at the forward production direction and in low-energy regime becomes available recently from the LEPS experiment, using unique 1.5-2.95 GeV linearly-polarized Compton-backward scattered photon beam at SPring-8 facility, Japan. The results are published in Physics Review Letters (PRL 120, 202004 (2018)) on May 18, 2018.
Strong forward-peaking production from the t-channel π-exchange is confirmed in the high precision data of differential cross sections and beam asymmetries. The measured negative beam asymmetries are opposite to those from π^+ and K^+ photo-production, corresponding to the production of dd ̅ and ss ̅ pairs. It is intriguing that analogous results are observed in the measurements of the transverse single-spin asymmetries in the pp and ep reactions. Further investigations are needed to clarify any fundamental connection. These precise data will surely improve the theoretical modeling of the low-energy hadronic interactions as well as the identification of new nucleon resonances.
(2) 西元年：2017
研究人員(中)：章文箴、朱明禮、謝佳諭、連昱翔、林志勳、澤田廣崇、鄧宇勝
研究人員(英)：CHANG, WEN-CHEN, Ming-Lee Chu, Chia-Yu Hsieh, Yu-Shiang Lian, Chih-Hsun Lin, Takahiro Sawada and Yu-Sheng Teng
研究成果名稱(中)：測定質子Sivers函數在極化Drell-Yan過程發生變號
研究成果名稱(英)：Observation of sign change in Drell-Yan Sivers function
簡要記述(中)：對於質子內部夸克組成的瞭解，已經由一維縱向動量分布，加入了橫向空間或橫向動量的資訊，進入了細緻的多維分布描述。其中，Sivers 函數是描述整體質子橫向自旋，與其內部夸克橫向動量的關連性，它會反映出夸克的橫向軌道運動效果，我們已經在SIDIS過程中發現Sivers 函數的強度是不為零，這也意味著夸克的橫向軌道運動的存在。透過量子色動力學（QCD）對於強作用力的描述，因為強作用力在SIDIS和Drell-Yan這兩個過程的時間方向是相反的，據此做出一個重要的預測：透過這二反應所得到的Sivers 函數的符號將是相反的。為了檢證這個預測，在2015年CERN COMPASS實驗組進行了首次橫向極化Drell-Yan過程的量測，實驗的結果的確與QCD的預測是相符的，為整體質子夸克橫向動量動量分布研究的正確性提供了極重要的實驗證據。
簡要記述(英)：Our understanding of the partonic structures of protons has been deepened from the one-dimension longitudinal momentum distributions to multi-dimensional distributions with additional dependency on transverse size or transverse momentum. Among the transverse momentum dependent parton distributions (TMDs), Sivers function describes the correlation between the transverse spin of the parent proton and the transverse momentum of the probed quark. A nonzero Sivers function is considered to be the strong evidence of quark orbital motion. The effects of a nonzero Sivers function have been observed in the semi-inclusive deep inelastic scattering (SIDIS) process. A fundamental prediction based on the factorization of Quantum Chromodynamics (QCD) is a sign change of Sivers functions between SIDIS and Drell-Yan processes due to their opposite time directions of the strong interaction involved. This milestone test has been recently accomplished by the COMPASS collaboration in 2015 transversely-polarized Drell-Yan run. The observed sign of Sivers functions is found to be consistent with the prediction of QCD. This work provides the essential experimental validation of the overall study of TMD partonic structures of protons.
主要相關著作：
M. Aghasyan et al. COMPASS Collaboration, 2017, “First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process”, Physical Review Letters, 119(11), 112002. (SCIE) (IF: 8.385; SCIE ranking: 7.1%)
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