Higher-order multipole amplitudes in charmonium radiative transitions

被引：23

作者：

Artuso, M. ^{[1
]}

Blusk, S. ^{[1
]}

Khalil, S. ^{[1
]}

Mountain, R. ^{[1
]}

Randrianarivony, K. ^{[1
]}

Skwarnicki, T. ^{[1
]}

Stone, S. ^{[1
]}

Wang, J. C. ^{[1
]}

Zhang, L. M. ^{[1
]}

Bonvicini, G. ^{[2
]}

Cinabro, D. ^{[2
]}

Lincoln, A. ^{[2
]}

Smith, M. J. ^{[2
]}

Zhou, P. ^{[2
]}

Zhu, J. ^{[2
]}

Naik, P. ^{[3
]}

Rademacker, J. ^{[3
]}

Asner, D. M. ^{[4
]}

Edwards, K. W. ^{[4
]}

Reed, J. ^{[4
]}

Robichaud, A. N. ^{[4
]}

Tatishvili, G. ^{[4
]}

White, E. J. ^{[4
]}

Briere, R. A. ^{[5
]}

Vogel, H. ^{[5
]}

Onyisi, P. U. E. ^{[6
]}

Rosner, J. L. ^{[6
]}

Alexander, J. P. ^{[7
]}

Cassel, D. G. ^{[7
]}

Ehrlich, R. ^{[7
]}

Fields, L. ^{[7
]}

Galik, R. S. ^{[7
]}

Gibbons, L. ^{[7
]}

Gray, S. W. ^{[7
]}

Hartill, D. L. ^{[7
]}

Heltsley, B. K. ^{[7
]}

Hunt, J. M. ^{[7
]}

Kreinick, D. L. ^{[7
]}

Kuznetsov, V. E. ^{[7
]}

Ledoux, J. ^{[7
]}

Mahlke-Krueger, H. ^{[7
]}

Patterson, J. R. ^{[7
]}

Peterson, D. ^{[7
]}

Riley, D. ^{[7
]}

Ryd, A. ^{[7
]}

Sadoff, A. J. ^{[7
]}

Shi, X. ^{[7
]}

Stroiney, S. ^{[7
]}

Sun, W. M. ^{[7
]}

Yelton, J. ^{[8
]}

机构：

[1] Syracuse Univ, Syracuse, NY 13244 USA

[2] Wayne State Univ, Detroit, MI 48202 USA

[3] Univ Bristol, Bristol BS8 1TL, Avon, England

[4] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[5] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[6] Univ Chicago, Chicago, IL 60637 USA

[7] Cornell Univ, Ithaca, NY 14853 USA

[8] Univ Florida, Gainesville, FL 32611 USA

[9] George Mason Univ, Fairfax, VA 22030 USA

[10] Univ Illinois, Urbana, IL 61801 USA

[11] Indiana Univ, Bloomington, IN 47405 USA

[12] Univ Kansas, Lawrence, KS 66045 USA

[13] Luther Coll, Decorah, IA 52101 USA

[14] Univ Minnesota, Minneapolis, MN 55455 USA

[15] Northwestern Univ, Evanston, IL 60208 USA

[16] Univ Oxford, Oxford OX1 3RH, England

[17] Univ Puerto Rico, Mayaguez, PR 00681 USA

[18] Purdue Univ, W Lafayette, IN 47907 USA

[19] Rensselaer Polytech Inst, Troy, NY 12180 USA

[20] Rice Univ, Houston, TX 77005 USA

[21] Univ Rochester, Rochester, NY 14627 USA

来源：

PHYSICAL REVIEW D | 2009年 / 80卷 / 11期

基金：

美国国家科学基金会;

关键词：

ANGULAR-DISTRIBUTIONS; PHYSICS;

D O I：

10.1103/PhysRevD.80.112003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using 24x10(6) Sigma(')equivalent to Sigma(2S) decays in CLEO-c, we have searched for higher multipole admixtures in electric-dipole-dominated radiative transitions in charmonia. We find good agreement between our data and theoretical predictions for magnetic quadrupole (M2) amplitudes in the transitions Sigma(')->gamma chi(c1,c2) and chi(c1,c2)->gamma J/Sigma, in striking contrast to some previous measurements. Let b(2)(J) and a(2)(J) denote the normalized M2 amplitudes in the respective aforementioned decays, where the superscript J refers to the angular momentum of the chi(cJ). By performing unbinned maximum likelihood fits to full five-parameter angular distributions, we found the following values of M2 admixtures for J(chi)=1: a(2)(J=1)=(-6.26 +/- 0.63 +/- 0.24)x10(-2) and b(2)(J=1)=(2.76 +/- 0.73 +/- 0.23)x10(-2), which agree well with theoretical expectations for a vanishing anomalous magnetic moment of the charm quark. For J(chi)=2, if we fix the electric octupole (E3) amplitudes to zero as theory predicts for transitions between charmonium S states and P states, we find a(2)(J=2)=(-9.3 +/- 1.6 +/- 0.3)x10(-2) and b(2)(J=2)=(1.0 +/- 1.3 +/- 0.3)x10(-2). If we allow for E3 amplitudes we find, with a four-parameter fit, a(2)(J=2)=(-7.9 +/- 1.9 +/- 0.3)x10(-2), b(2)(J=2)=(0.2 +/- 1.4 +/- 0.4)x10(-2), a(3)(J=2)=(1.7 +/- 1.4 +/- 0.3)x10(-2), and b(3)(J=2)=(-0.8 +/- 1.2 +/- 0.2)x10(-2). We determine the ratios a(2)(J=1)/a(2)(J=2)=0.67(-0.13)(+0.19) and a(2)(J=1)/b(2)(J=1)=-2.27(-0.99)(+0.57), where the theoretical predictions are independent of the charmed quark magnetic moment and are a(2)(J=1)/a(2)(J=2)=0.676 +/- 0.071 and a(2)(J=1)/b(2)(J=1)=-2.27 +/- 0.16.

引用

页数：16

共 37 条

[1] Measurement of the χc2 polarization in ψ(2S)→γχc2 -: art. no. 092004
Ablikim, M
Bai, JZ
Ban, Y
Bian, JG
Cai, X
Chang, JF
Chen, HF
Chen, HS
Chen, HX
Chen, JC
Chen, J
Chen, J
Chen, ML
Chen, YB
Chi, SP
Chu, YP
Cui, XZ
Dai, HL
Dai, YS
Deng, ZY
Dong, LY
Du, SX
Du, ZZ
Fang, J
Fang, SS
Fu, CD
Fu, HY
Gao, CS
Gao, YN
Gong, MY
Gong, WX
Gu, SD
Guo, YN
Guo, YQ
Guo, ZJ
Harris, FA
He, KL
He, M
He, X
Heng, YK
Hu, HM
Hu, T
Huang, GS
Huang, L
Huang, XP
Ji, XB
Jia, QY
Jiang, CH
Jiang, XS
Jin, DP
[J]. PHYSICAL REVIEW D, 2004, 70 (09): : 092004 - 1
[2] Observation of J/ψ→3γ
Adams, G. S.
Anderson, M.
Cummings, J. P.
Danko, I.
Hu, D.
Moziak, B.
Napolitano, J.
He, Q.
Insler, J.
Muramatsu, H.
Park, C. S.
Thorndike, E. H.
Yang, F.
Artuso, M.
Blusk, S.
Khalil, S.
Li, J.
Mountain, R.
Nisar, S.
Randrianarivony, K.
Sultana, N.
Skwarnicki, T.
Stone, S.
Wang, J. C.
Zhang, L. M.
Bonvicini, G.
Cinabro, D.
Dubrovin, M.
Lincoln, A.
Naik, P.
Rademacker, J.
Asner, D. M.
Edwards, K. W.
Reed, J.
Briere, R. A.
Ferguson, T.
Ma, J. S. Y.
Tatishvili, G.
Vogel, H.
Watkins, M. E.
Rosner, J. L.
Alexander, J. P.
Cassel, D. G.
Duboscq, J. E.
Ehrlich, R.
Fields, L.
Galik, R. S.
Gibbons, L.
Gray, R.
Gray, S. W.
[J]. PHYSICAL REVIEW LETTERS, 2008, 101 (10)
[3] Ambrogiani M, 2002, PHYS REV D, V65, DOI 10.1103/PhysRevD.65.052002
[4] Review of particle physics
Amsler, C.
Doser, M.
Antonelli, M.
Asner, D. M.
Babu, K. S.
Baer, H.
Band, H. R.
Barnett, R. M.
Bergren, E.
Beringer, J.
Bernardi, G.
Bertl, W.
Bichsel, H.
Biebel, O.
Bloch, P.
Blucher, E.
Blusk, S.
Cahn, R. N.
Carena, M.
Caso, C.
Cecccci, A.
Chakraborty, D.
Chen, M. -C.
Chivukula, R. S.
Cowan, G.
Dahl, O.
D'Ambrosio, G.
Damour, T.
de Gouvea, A.
DeGrand, T.
Dobrescu, B.
Drees, M.
Edwards, D. A.
Eidelman, S.
Elvira, V. D.
Erler, J.
Ezhela, V. V.
Feng, J. L.
Fetscher, W.
Fields, B. D.
Foster, B.
Gaisser, T. K.
Garren, L.
Gerber, H. -J.
Gerbier, G.
Gherghetta, T.
Giudice, G. F.
Goodman, M.
Grab, C.
Gritsan, A. V.
[J]. PHYSICS LETTERS B, 2008, 667 (1-5) : 1 - +
[5] STUDY OF THE ANGULAR-DISTRIBUTION OF THE REACTION (P)OVER-BARP-]CHI-C2-]J/PSI-GAMMA-]E+E-GAMMA
ARMSTRONG, TA
BETTONI, D
BHARADWAJ, V
BIINO, C
BORREANI, G
BROEMMELSIEK, D
BUZZO, A
CALABRESE, R
CECCUCCI, A
CESTER, R
CHURCH, MD
DALPIAZ, P
DALPIAZ, PF
DIBENEDETTO, R
DIMITROYANNIS, D
FABBRI, MG
FAST, JE
GIANOLI, A
GINSBURG, CM
GOLLWITZER, KE
HAHN, AA
HASAN, MA
HSUEH, SY
LEWIS, RA
LUPPI, E
MACRI, M
MAJEWSKA, AM
MANDELKERN, MA
MARCHETTO, F
MARINELLI, M
MARQUES, JL
MARSH, W
MARTINI, M
MASUZAWA, M
MENICHETTI, E
MIGLIORI, A
MUSSA, R
PALESTINI, S
PALLAVICINI, M
PASTRONE, N
PATRIGNANI, C
PEOPLES, J
PESANDO, L
PETRUCCI, F
PIA, MG
PORDES, S
RAPIDIS, PA
RAY, RE
REID, JD
RINAUDO, G
[J]. PHYSICAL REVIEW D, 1993, 48 (07): : 3037 - 3044
[6] New measurement of exclusive decays of the χc0 and χc2 to two-meson final states
Asner, D. M.
Edwards, K. W.
Reed, J.
Robichaud, A. N.
Tatishvili, G.
Briere, R. A.
Vogel, H.
Onyisi, P. U. E.
Rosner, J. L.
Alexander, J. P.
Cassel, D. G.
Duboscq, J. E.
Ehrlich, R.
Fields, L.
Galik, R. S.
Gibbons, L.
Gray, R.
Gray, S. W.
Hartill, D. L.
Heltsley, B. K.
Hertz, D.
Hunt, J. M.
Kandaswamy, J.
Kreinick, D. L.
Kuznetsov, V. E.
Ledoux, J.
Mahlke-Krueger, H.
Mohapatra, D.
Patterson, J. R.
Peterson, D.
Riley, D.
Ryd, A.
Sadoff, A. J.
Shi, X.
Stroiney, S.
Sun, W. M.
Wilksen, T.
Athar, S. B.
Yelton, J.
Rubin, P.
Mehrabyan, S.
Lowrey, N.
Selen, M.
White, E. J.
Wiss, J.
Mitchell, R. E.
Shepherd, M. R.
Besson, D.
Pedlar, T. K.
Cronin-Hennessy, D.
[J]. PHYSICAL REVIEW D, 2009, 79 (07):
[7] Photon transitions in ψ(2S) decays to χcJ(1P) and ηc(1S) -: art. no. 112002
Athar, SB
Avery, P
Breva-Newell, L
Patel, R
Potlia, V
Stoeck, H
Yelton, J
Rubin, P
Cawlfield, C
Eisenstein, BI
Gollin, GD
Karliner, I
Kim, D
Lowrey, N
Naik, P
Sedlack, C
Selen, M
Thaler, JJ
Williams, J
Wiss, J
Edwards, KW
Besson, D
Gao, KY
Gong, DT
Kubota, Y
Lang, BW
Li, SZ
Poling, R
Scott, AW
Smith, A
Stepaniak, CJ
Urheim, J
Metreveli, Z
Seth, KK
Tomaradze, A
Zweber, P
Ernst, J
Mahmood, AH
Severini, H
Asner, DM
Dytman, SA
Mehrabyan, S
Mueller, JA
Savinov, V
Li, Z
Lopez, A
Mendez, H
Ramirez, J
Huang, GS
Miller, DH
[J]. PHYSICAL REVIEW D, 2004, 70 (11) : 112002 - 1
[8] Measurements of the cross section for e+e- → hadrons at center-of-mass energies from 2 to 5 GeV -: art. no. 101802
Bai, JZ
Ban, Y
Bian, JG
Chen, AD
Chen, HF
Chen, HS
Chen, JC
Chen, XD
Chen, YB
Cheng, BS
Chi, SP
Chu, YP
Choi, JB
Cui, XZ
Dai, YS
Dong, LY
Du, ZZ
Dunwoodie, W
Fu, HY
Fu, LP
Gao, CS
Gu, SD
Guo, YN
Guo, ZJ
Han, SW
Han, Y
Harris, FA
He, J
He, JT
He, KL
He, M
He, X
Hong, T
Heng, YK
Hu, GY
Hu, HM
Hu, QH
Hu, T
Huang, GS
Huang, XP
Huang, YZ
Izen, JM
Ji, XB
Jiang, CH
Jin, Y
Jones, BD
Kang, JS
Ke, ZJ
Kim, HJ
Kim, SK
[J]. PHYSICAL REVIEW LETTERS, 2002, 88 (10) : 5 - 101802
[9] PHOTOS - A UNIVERSAL MONTE-CARLO FOR QED RADIATIVE-CORRECTIONS - VERSION 2.0
BARBERIO, E
WAS, Z
[J]. COMPUTER PHYSICS COMMUNICATIONS, 1994, 79 (02) : 291 - 308
[10] BRAMBILLA N, 2004, CERN2005005 QUARK WO

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