Li,Hsiang-Nan / Distinguished Research Fellow

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Contact Information

Education

Secretary

Sam, Svetlana CY. / 886-2-2789-8386

Research Interest

  • Perturbative Quantum Chromodynamics
  • Heavy Quark Physics

獎項及殊榮

(1) 國內學術研究獎項 2019-02 科技部傑出特約研究員
(2) 國內學術研究獎項 2015, 2016, 2017, 2018 科技部特約研究計畫
(3) 國內學術研究獎項 2012-09 教育部學術獎
(4) 國內學術研究獎項 2012 國科會傑出研究獎
(5) 其他國際學術研究獎項 2010-02 Khwarizmi International Award
(6) 國內學術研究獎項 2009-01 國科會傑出學者研究計畫
(7) 其他國際學術研究獎項 2007 Achievement in Asia Award from Overseas Chinese Physics Association
(8) 國內學術研究獎項 2002 國科會傑出研究獎
(9) 國內學術研究獎項 1997 國科會傑出研究獎

Experience

  • 1992-1993 Postdoc, Institute of Physics, Academia Sinica
  • 1993-1996 Associated Professor, Department of Physics, National Chung-Cheng University
  • 1996-1997 Professor, Department of Physics, National Chung-Cheng University
  • 1997-2001 Professor, Department of Physics, National Cheng-Kung University
  • 2001- Research Fellow, Institute of Physics, Academia Sinica

Publication

Journal Papers

  • [1]     X. Liu, H.N. Li, Z.J. Xiao, 2020, “Next-to-leading-logarithm resummation for decays”, PHYSICS LETTERS B, 811, 135892. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [2]     H.N. Li, H. Umeeda, 2020, “QCD sum rules with spectral densities solved in inverse problems”, Physical Review D, 102, 114014. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [3]     H.N. Li, H. Umeeda, F. Xu, F.-S. Yu, 2020, “D meson mixing as an inverse problem”, PHYSICS LETTERS B, 810, 135802. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [4]     J.S. Hong, T.K. Wang, A.E. Chen, H.N. Li, K.R. Chen, 2020, “Source Image Squeezing and Field Tunneling for Propagating Light Beyond-Limit Focusing to Reach the Intermediate Zone”, Plasmonics, 00, 00. (SCIE) (IF: 2.335; SCIE ranking: 67%,61.6%,54.1%)

  • [5]     H.N. Li, H. Umeeda, 2020, “Vacuum polarization contribution to muon g−2 as an inverse problem”, PHYSICAL REVIEW D, 102, 094003. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [6]     D.J. Yang, H.N. Li, 2020, “Charm fragmentation functions in the Nambu-Jona-Lasinio model”, PHYSICAL REVIEW D, 102, 036023. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [7]     Sanjin Benić, Yoshitaka Hatta, Hsiang-nan Li, and Dong-Jing Yang, 2019, “Single-spin asymmetries at two loops”, PHYSICAL REVIEW D, 100, 094027. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [8]     Junmou Chen, Pyungwon Ko, Hsiang-nan Li, Jinmian Li, Hiroshi Yokoya, 2019, “Light dark matter showering under broken dark U(1) — revisited”, JOURNAL OF HIGH ENERGY PHYSICS, 01,141. (SCIE) (IF: 5.875; SCIE ranking: 13.8%)

  • [9]     Zhou Rui, Ya Li, and Hsiang-nan Li, 2018, “P-wave contributions to B→ψππ decays in the perturbative QCD approach”, PHYSICAL REVIEW D, 98, 113003. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [10]     Liu Xin, Li Hsiang-nan, Xiao Zhen-Jun, 2018, “Improved perturbative QCD formalism for Bc meson decays”, Physical Review D, 97(11). (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [11]     Hua-Yu Jiang, Fu-Sheng Yu, Qin Qin, Hsiang-nan Li, Cai-Dian Lü, 2018, “D0-bar D0 mixing parameter y in the factorization-assisted topological-amplitude approach”, CHINESE PHYSICS, 42, 063101.

  • [12]     Chien Yang-Ting, Li Hsiang-nan, 2018, “Factorization of standard model cross sections at ultrahigh energy”, Physical Review D, 97(5). (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [13]     Wang Chao, Liu Jing-Bin, Li Hsiang-nan, Lü Cai-Dian, 2018, “Three-body decays B→ϕ(ρ)Kγ in perturbative QCD approach”, Physical Review D, 97(3). (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [14]     D. Wang, F.S. Yu, H.N. Li, 2017, “CP Asymmetries in Charm Decays into Neutral Kaons”, Physical Review Letters, 119(18), 181802. (SCIE) (IF: 8.385; SCIE ranking: 7.1%)

  • [15]     J. Isaacson, H.N. Li, Z. Li, C.P. Yuan, 2017, “Factorization for substructures of boosted Higgs jets”, PHYSICS LETTERS B, 771, 619-623. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [16]     S. Cheng, Y.L. Zhang, J. Hua, H.N. Li, Z.J. Xiao, 2017, “Revisiting factorization theorem for at twist 3”, PHYSICAL REVIEW D, 95, 076005. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [17]     H.N. Li, 2016, “Non-dipolar Wilson links for quasi-parton distribution functions”, PHYSICAL REVIEW D, 94, 074036. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [18]     W.F. Wang, H.N. Li, 2016, “Quasi-two-body decays in perturbative QCD approach”, PHYSICS LETTERS B, 763, 29-39. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [19]     D.J. Yang, H.N. Li*, 2016, “Gluon fragmentation functions in the Nambu-Jona-Lasinio model”, PHYSICAL REVIEW D, 94, 054041. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [20]     Y. Kitadono, H.N. Li, 2016, “Jet substructures of boosted polarized hadronic top quarks”, PHYSICAL REVIEW D, 93, 054043. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [21]     X. Liu, H.N. Li, Z.J. Xiao, 2016, “Resolving the puzzle by Glauber-gluon effects ”, PHYSICAL REVIEW D, 93, 014024. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [22]     A. Watanabe, H.N. Li*, 2015, “Photon structure functions at small x in holographic QCD ”, PHYSICS LETTERS B, 751, 321-325. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [23]     H.N. Li, Y.M. Wang, 2015, “Non-dipolar Wilson links for transverse-momentum-dependent wave functions ”, JOURNAL OF HIGH ENERGY PHYSICS, 1506, 013. (SCIE) (IF: 5.875; SCIE ranking: 13.8%)

  • [24]     X. Liu, H.N. Li*, Z.J. Xiao, 2015, “Transverse-momentum-dependent wave functions with Glauber gluons in , decays ”, PHYSICAL REVIEW D, 91, 11, 114019. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [25]     W.F. Wang, H.N. Li, W. Wang, C.D. Lu , 2015, “-wave resonance contributions to the and decays ”, PHYSICAL REVIEW D, 91, 9, 094024. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [26]      H.N. Li, S. Mishima, 2014, “Glauber gluons in spectator amplitudes for decays”, PHYSICAL REVIEW D, 90, 074018. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [27]     H.N. Li, 2014, “Resummation with Wilson lines off the light cone”, PHYSICS OF PARTICLES AND NUCLEI, 45 (4), 756-770. (SCIE) (IF: 0.318; SCIE ranking: 100%)

  • [28]      Y. Kitadono, H.N. Li, 2014, “Jet substructures of boosted polarized top quarks”, PHYSICAL REVIEW D, 89, 114002. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [29]     W.F. Wang, H.C. Hu, H.N. Li*, C.D. Lü, 2014, “Direct CP asymmetries of three-body decays in perturbtive QCD”, PHYSICAL REVIEW D, 89, 074031. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [30]     Q. Qin, H.N. Li, C.D. Lu, F.S. Yu,, 2014, “Branching ratios and direct CP asymmetries in decays”, PHYSICAL REVIEW D, 89, 054006. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [31]      Q. Qin, Z.T. Zou, X. Yu, H.N. Li, C.D. Lü, 2014, “Perturbative QCD study of decays to a pseudoscalar meson and a tensor meson ”, PHYSICS LETTERS B, 732, 36-40. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [32]     H.N. Li, Y.L. Shen, Y.M. Wang, 2014, “Joint resummation for pion wave function and pion transition form factor”, JOURNAL OF HIGH ENERGY PHYSICS, 01, 004. (SCIE) (IF: 5.875; SCIE ranking: 13.8%)

  • [33]     V. Rentala, N. Vignaroli, H.N. Li*, Z. Li, C.P. Yuan* , 2013, “Discriminating Higgs production mechanisms using jet energy profiles ”, PHYSICAL REVIEW D, 88, 073007. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [34]     C.P. Chang and H.N. Li, 2013, “Glauber gluons in pion-induced Drell-Yan processes”, PHYSICS LETTERS B, 726, 262-265. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [35]     H.N. Li, Z. Li, C.P. Yuan, 2013, “QCD resummation for light-particle jets”, PHYSICAL REVIEW D, 87, 074025. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [36]     Y. Kitadono, H.N. Li, 2013, “Spin analyzing power for polarized top decays with jets”, PHYSICAL REVIEW D, 87, 054017. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [37]     H.N. Li, Y.L. Shen, Y.M. Wang, 2013, “Resummation of rapidity logarithms in meson wave functions”, JOURNAL OF HIGH ENERGY PHYSICS, 02, 008. (SCIE) (IF: 5.875; SCIE ranking: 13.8%)

  • [38]      H.C. Hu, H.N Li, 2013, “Next-to-leading-order time-like pion form factors in factorization”, PHYSICS LETTERS B, 718, 1351-1357. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [39]     H.N. Li, C.D. Lu, F.S. Yu, 2012, “Branching ratios and direct CP asymmetries in decays”, PHYSICAL REVIEW D, 86 (3), 036012. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [40]      X. Liu, H.N. Li, Z.J. Xiao, 2012, “`Implications on --glueball mixing from Decays”, PHYSICAL REVIEW D, 86(1), 011501(R). (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [41]      Y.C. Chen, H.N. Li, 2012, “Three-parton contribution to the form factors in factorization”, PHYSICS LETTERS B, 712(1-2), 63-69. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [42]     H.N. Li, Y.L. Shen, Y.M. Wang, 2012, “Next-to-leading-order corrections to form factors in factorization”, PHYSICAL REVIEW D, 85(7), 074004. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [43]      Y.D. Tsai, H.N. Li, Q. Zhao, 2012, “ mixing effects on charmonium and meson decays”, PHYSICAL REVIEW D, 85(3), 034002. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [44]     H.N. Li, Z. Li, C.P. Yuan, 2011, “QCD resummation for jet substructures”, PHYSICAL REVIEW LETTERS, 107(15), 152001. (SCIE) (IF: 8.385; SCIE ranking: 7.1%)

  • [45]     Y.C. Chen, H.N. Li, 2011, “Three-parton contribution to pion form factor in factorization”, PHYSICAL REVIEW D, 84(3), 034018. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [46]     C.P. Chang and H.N. Li, 2011, “Restoration of factorization for low hadron hadroproduction”, EUROPEAN JOURNAL OF PHYSICS C, 71(6), 1687.

  • [47]     R.C. Hsieh and H.N. Li, 2011, “Nonlocal condensate model for QCD sum rules”, PHYSICS LETTERS B, 698(2), 140-145. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [48]     H.N Li, Y.L. Shen, Y.M. Wang, and H. Zou, 2011, “Next-to-leading-order correction to pion form factor in factorization”, PHYSICAL REVIEW D, 83(5), 054029. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [49]     H.N. Li and S. Mishima, 2011, “Possible resolution of the puzzles”, PHYSICAL REVIEW D, 83(3), 034023. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [50]     H.N. Li, S. Mishima, 2009, “Pion transition form factor in factorization”, PHYSICAL REVIEW D, 80, 074024. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [51]     H.N. Li, S. Mishima, 2009, “Comment on "Gauge Invariance and -Factorization of Exclusive Processes”, PHYSICS LETTERS B, 674(3), 182. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [52]     H.Y. Cheng, H.N. Li, K.F. Liu, 2009, “Pseudoscalar glueball mass from -- mixing”, PHYSICAL REVIEW D, 79(1), 014024. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [53]     J. Chay, H.N. Li, S. Mishima, 2008, “Possible complex annihilation and direct CP asymmetry”, PHYSICAL REVIEW D, 78(3), 034037. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [54]     J.F. Hsu, Y.Y. Charng, H.N. Li, 2008, “Okubo-Zweig-Iizuka-rule violation and branching ratios”, PHYSICAL REVIEW D, 78(1), 014020. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [55]     S. Nandi, H.N. Li, 2007, “Next-to-leading-order corrections to exclusive processes in k_T factorization.”, PHYSICAL REVIEW D, 76(3), 034008. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [56]     H.N. Li and S. Mishima, 2007, “Penguin pollution in the decay. ”, JOURNAL OF HIGH ENERGY PHYSICS, 07(3) ,009. (SCIE) (IF: 5.875; SCIE ranking: 13.8%)

  • [57]     W.S. Hou, H.N. Li, S. Mishima, M. Nagashima , 2007, “Fourth generation CP violation effect on B K pi, phi K and rho K in NLO PQCD.”, PHYSICAL REVIEW LETTERS, 98(13),131801. (SCIE) (IF: 8.385; SCIE ranking: 7.1%)

  • [58]     H.N. Li, S. Mishima, 2006, “Penguin-dominated decays in NLO perturbative QCD”, PHYSICAL REVIEW D, 74, 094020. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [59]     Y.Y. Charng, T. Kurimoto, H.N. Li, 2006, “Gluonic contribution to form factors”, PHYSICAL REVIEW D, 74, 074024. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [60]     H.N. Li, S. Mishima, 2006, “Implication of the data on the puzzle”, PHYSICAL REVIEW D, 73, 114014. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [61]     H.N. Li , 2005, “Resolution to the B ->phi K* polarization puzzle”, PHYSICS LETTERS B, 622(1-2), 63-68. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [62]     Y.Y. Charng, H.N. Li, 2005, “B meson wave function from the decay”, PHYSICAL REVIEW D, 72(1), 014003. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [63]     C.H. Chen, H.N. Li , 2005, “Nonfactorizable contributions to B meson decays into charmonia”, PHYSICAL REVIEW D, 71(11), 114008. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [64]     M. Nagashima, H.N. Li, 2005, “Two-parton twist-3 factorization in perturbative QCD”, EUROPEAN PHYSICAL JOURNAL C, 40(3), 395-417. (SCIE) (IF: 4.389; SCIE ranking: 24.1%)

  • [65]     H.N. Li, S. Mishima, 2005, “Polarizations in B -> VV decays”, PHYSICAL REVIEW D, 71(5), 054025. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [66]     Y.Y. Charng, H.N. Li, 2005, “Determining weak phases from the , decays”, PHYSICAL REVIEW D, 71(1), 014036. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [67]     H.N. Li, H.S. Liao , 2004, “B meson wave function in k(T) factorization”, PHYSICAL REVIEW D, 70(7), 074030. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [68]     R.C. Hsieh, H.N. Li , 2004, “Transition to perturbative QCD in two-photon collisions”, PHYSICAL REVIEW D, 70(5), 056002. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [69]     C.H. Chen, H.N. Li, 2004, “Vector-pseudoscalar two-meson distribution amplitudes in three-body B meson decays”, PHYSICAL REVIEW D, 70(5), 054006. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [70]     Y.Y. Charng, H.N. Li , 2004, “Weak phases from topological-amplitude parametrization”, PHYSICS LETTERS B, 594(1-2), 185-195. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [71]     Y.Y. Keum, T. Kurimoto, H.N. Li, C.D. Lu, A.I. Sanda, 2004, “Nonfactorizable contributions to decays”, PHYSICAL REVIEW D, 69(9), 094018. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [72]     C.H.Chen, H.N. Li, 2004, “Looking for D-sJ* mesons in B meson decays”, PHYSICAL REVIEW D, 69(5), 054002. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [73]     C.H. Chen, H.N. Li , 2003, “Three-body nonleptonic B decays in perturbative QCD”, PHYSICS LETTERS B, 561(3-4): 258-265. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [74]     T. Kurimoto T, H.N. Li, A.I. Sanda , 2003, “ form factors in perturbative QCD”, PHYSICAL REVIEW D, 67(5), 054028. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [75]     H.N. Li, K. Ukai , 2003, “Threshold resummation for nonleptonic B meson decays”, PHYSICS LETTERS B, 555(3-4): 197-205. (SCIE) (IF: 4.384; SCIE ranking: 26.5%,27.6%,21.1%)

  • [76]     M. Nagashima, H.N. Li , 2003, “ factorization of exclusive processes”, PHYSICAL REVIEW D, 67(3): 034001. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [77]     H.N. Li, 2003, “QCD aspects of exclusive B meson decays”, PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 51(1), 85-171. (SCIE) (IF: 13.421; SCIE ranking: 6.9%,5.3%)

  • [78]     H.N. Li, 2002, “Threshold resummation for meson decays”, PHYSICAL REVIEW D, 66((9): 094010. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

  • [79]     Y.Y. Keum, H.N. Li, A.I. Sanda, 2001, “`Penguins enhancement and decays in perturbative QCD”, PHYSICAL REVIEW D, 63, 054008. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)

Books Authored

  • [1]     H.N. Li, G.L. Lin and W.M. Zhang, 2000, Proceedings of the Fifth International Workshop on Particle Physics Phenomenology, Singapore: World Scientific.

  • [2]     H.Y. Cheng, W.S. Hou, H.N. Li and G.L. Lin, 1998, Proceedings of the Fourth International Workshop on Particle Physics Phenomenology, Singapore: World Scientific.

發現與突破

(1) 西元年:2017
研究人員(中):李湘楠、王迪, 余福升
研究人員(英):LI, HSIANG NAN, D. Wang, F.S. Yu
研究成果名稱(中):粲夸克衰變至中性K介子中的CP非對稱性
研究成果名稱(英):CP asymmetries in charm decays into neutral kaons
簡要記述(中):我們在含粲夸克粒子衰變到中性K介子的過程中發現了新的CP破壞效應,其機制源自初態粒子衰變和末態粒子震盪之間的干涉作用,這現象和已知的混合導致的CP破壞不同,後者是來自初態粒子衰變和初態粒子震盪之間的干涉作用。歐洲核子中心大型強子對撞機LHCb實驗組及日本高能加速器研究機構的Belle II實驗組已準備測量並驗證這新的CP破壞效應,研究成果發表在2017年10月的物理評論通訊。
簡要記述(英):We find a new CP-violation effect in charm decays into neutral kaons, which results from the interference between two decay amplitudes of an initial-state particle with the mixing of final-state particles. This phenomenon differs from the known mixing-induced CP violation, which results from the decay amplitudes and the mixing of an initial-state particle. This new CP violation effect will be measured and verified by the LHCb collaboration at CERN and the Belle II collaboration at KEK in Japan. Our work has been published in Physical Review Letters in Oct. of 2017.
(2) 西元年:2011
研究人員(中):李湘楠
研究人員(英):LI, HSIANG NAN
研究成果名稱(中):噴流次結構的量子色動力學重求和方法
研究成果名稱(英):QCD resummation for jet substructures
簡要記述(中):本所研究員李湘楠博士與密西根州立大學研究人員合作,以微擾量子色動力學的重求和(resummation)方法為基礎,建立強子對撞機中噴流(jet)現象的理論架構,成功描述費米實驗室及大型強子對撞機測量的噴流質量與噴流內部的能量分佈。噴流的測量是高能實驗物理學家用以辨識對撞機生成粒子(包括新粒子)的主要方法,之前對於這些觀測量的預測必須依賴數值模擬,李湘楠博士的工作首度實現物理學家以量子場論研究噴流現象的想法,此最新研究成果已發表於《物理評論通訊(Physical Review Letters)》。
簡要記述(英):Dr. Hsiang-nan Li developed a theoretical framework for studying jet observables through a collaboration with researchers of Michigan State University, which is based on the perturbative QCD resummation. Using this framework, they have successfully explained jet distributions in invariant mass and jet energy profiles measured by Fermilab and Large Hadron Collider. Jet observables have been used to identfy particles produced at hadron colliders, whose predictions always rely on Event Generators. Dr. Li`s work realized the goal of studying these observables using Quantum Field Theory for the first time. This new development has been published in Physical Review Letters.

主要相關著作:
H.N. Li, Z. Li, C.P. Yuan, 2011, “QCD resummation for jet substructures”, PHYSICAL REVIEW LETTERS, 107(15), 152001. (SCIE) (IF: 8.385; SCIE ranking: 7.1%)
(3) 西元年:2007
研究人員(中):李湘楠、侯維恕、三島智、長島真紀子
研究人員(英):LI, HSIANG NAN, We--Shu Hou, Satoshi Mishima, Makiko Nagashima
研究成果名稱(中):B介子衰變中的第四代CP破缺效應
研究成果名稱(英):Fourth Generation CP Violation Effects on , and
簡要記述(中):李湘楠與侯維恕、三島智、長島真紀子合作探討第四代夸克對企鵝圖佔主要貢獻的雙體非輕子B介子衰變的影響。利用次階微擾量子色動力學架構下較大的色壓低樹振幅,加上第四代夸克引入的新CP相角,可對B -> K pi, phi K 和 rho K 衰變道中直接及混合引發的CP對稱破缺
實驗數據做出較好的解釋。此研究對最近B工廠發現的知名難題提供了可能的解答,這項工作已發表在物理界最權威的期刊 《物理評論通訊 》 Physical Review Letters 98 (2007) 131801 。

簡要記述(英):We study the effect from a sequential fourth generation quark on
penguin-dominated two-body nonleptonic meson decays in the
next-to-leading order perturbative QCD formalism. With an
enhancement of the color-suppressed tree amplitude and possibility
of a new CP phase in the electroweak penguin, we can account
better for . Taking with phase just
below , which are consistent with the rate and the mixing parameter , we find a downward shift in the mixing-induced CP
asymmetries of and . The predicted
behavior for is opposite.
(4) 西元年:2001
研究人員(中):李湘楠、琴龍淵, 三田一郎
研究人員(英):LI, HSIANG NAN, Y.Y. Keum, A.I. Sanda
研究成果名稱(中):B介子雙體非輕子衰變的理論
研究成果名稱(英):Theory for two-body nonleptonic B meson decays
簡要記述(中):雙體非輕子衰變是近年來B物理領域中最重要的課題,此衰變的測量可決定標準模型中的基本參數,CKM(Cabibbo-Kobayashi-Maskawa)矩陣元,此矩陣元若為複數,其相角即為CP對稱性破壞的來源之一。然而,實驗數據並不直接與CKM矩陣元關聯,所有強子過程皆包含量子色動力學(QCD)的機制,此機制的非微擾性使以上的關聯益形複雜。發展B介子衰變的QCD理論乃成為B物理理論界最迫切的任務。本人於2000年提出研究B介子雙體非輕子衰變的理論,以微擾量子色動力學(PQCD)為基礎,具有預測能力。許多PQCD的預測都獲得實驗的證實,譬如本人在2001年預測 B -> K pi 中的CP破缺約為 -10%,後來獲得史旦福大學的線性加速器中心(SLAC)和日本的高能加速器研究機構(KEK)B工廠(分別稱為BABAR和BELLE)的證實。PQCD已成為B物理領域的主要QCD理論。
簡要記述(英):Two-body nonleptonic B meson decays are one of the most important subjects in B physics, whose measurements can be used to determine the fundamental parameters, the CKM (Cabibbo-Kobayashi-Maskawa) matrix elements, in the Standard Model. If these matrix elements are complex, their phases will be one of the sources of CP violation in the universe. However, experimental data are not directly related to the CKM matrix elements. All hadronic processes involve mechanism from Quantum Chromodynamics (QCD), whose nonperturbative origin further complicates the relation. Developing a QCD theory for B meson decays became a urgent task in the theoretical community of B physics. We proposed a theory for the study of two-body nonleptonic B meson decays based on perturbative QCD (PQCD) in 2001, which has strong predictive power. Many PQCD predictions have been confirmed by experiments. For example, we predicted the direct CP asymmetry in decays to be -10% in 2001, that was confirmed by the B factories at the SLAC National Accelerator Laboratory in USA and at KEK in Japan, which are called BABAR and Belle, respectively. PQCD has become one of the major QCD theories in B physics.
主要相關著作:
Y.Y. Keum, H.N. Li, A.I. Sanda, 2001, “`Penguins enhancement and decays in perturbative QCD”, PHYSICAL REVIEW D, 63, 054008. (SCIE) (IF: 4.833; SCIE ranking: 23.5%,20.7%)
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