Formation of spin-one mesons by photon-photon fusion

H. Aihara, M. Alston-Garnjost, R. E. Avery, A. Barbaro-Galtieri, A. R. Barker, B. A. Barnett, D. A. Bauer, A. Bay, H. U. Bengtsson, G. J. Bobbink, C. D. Buchanan, A. Buijs, D. O. Caldwell, H. Y. Chao, S. B. Chun, A. R. Clark, G. D. Cowan, D. A. Crane, O. I. Dahl, M. DaoudiK. A. Derby, J. J. Eastman, P. H. Eberhard, T. K. Edberg, A. M. Eisner, R. Enomoto, F. C. Erné, K. H. Fairfield, J. M. Hauptman, W. Hofmann, J. Hylen, T. Kamae, H. S. Kaye, R. W. Kenney, S. Khacheryan, R. R. Kofler, W. G J Langeveld, J. G. Layter, W. T. Lin, F. L. Linde, S. C. Loken, A. Lu, G. R. Lynch, R. J. Madaras, B. D. Magnuson, G. E. Masek, L. G. Mathis, J. A J Matthews, S. J. Maxfield, E. S. Miller, W. Moses, D. R. Nygren, P. J. Oddone, H. P. Paar, Sung Keun Park, D. E. Pellett, M. Pripstein, M. T. Ronan, R. R. Ross, F. R. Rouse, K. A. Schwitkis, J. C. Sens, G. Shapiro, B. C. Shen, W. E. Slater, J. R. Smith, J. S. Steinman, R. W. Stephens, M. L. Stevenson, D. H. Stork, M. G. Strauss, M. K. Sullivan, T. Takahashi, S. Toutounchi, R. Van Tyen, G. J. Vandalen, W. Vernon, W. Wagner, E. M. Wang, Y. X. Wang, W. A. Wenzel, Z. R. Wolf, H. Yamamoto, S. J. Yellin, C. Zeitlin

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

We have observed the formation of two spin-one mesons in fusion reactions in which one photon was highly virtual. The first, consistent with being the JPC=1++ f1(1285), was seen in the final state - , as was the (958). We have previously reported the observation of the second spin-one state, the X(1420), in the final state KKS0 (KS0'+-). The formation of this state, which may be the f1(1420) observed in hadronic interactions, is reanalyzed using a new model and more data. We consider whether the X(1420) could be the partner of the f1(1285) in the JPC=1++ meson nonet. The * width of each resonance was determined in several Q2 bins. Using a model due to Cahn with a form factor, we obtained for the coupling parameter (f1(1285)) the value 2.40.50.5 keV. We also found B(X(1420)KK)(X(1420))=1.3z0.50.3 keV using a form factor, or 0.630.240.15 keV using a form factor. The decay distributions of the observed X(1420) events are consistent with a decay proceeding via K*(892)K, and favor positive, but do not exclude negative, parity. Assuming that the X(1420) and the f1(1285) are members of the same qq meson nonet and that B(X(1420)KK)1, and using a form factor in the model for X(1420) formation, we determined the singlet-octet mixing angle of that nonet. The result, (45.46.2)°, agrees well with the 42.2°implied by the Gell-MannOkubo quadratic mass formula; it is farther from the 35.3°ideal mixing angle. Our results are thus consistent with the X(1420) being the mostly ss isoscalar member of the axial-vector qq meson nonet; however, we have no evidence contrary to hypotheses that the X(1420) is an exotic q2q 2 or qqg state.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalPhysical Review D
Volume38
Issue number1
DOIs
Publication statusPublished - 1988 Dec 1
Externally publishedYes

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form factors
mesons
fusion
photons
octets
decay
vector mesons
parity
interactions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Aihara, H., Alston-Garnjost, M., Avery, R. E., Barbaro-Galtieri, A., Barker, A. R., Barnett, B. A., ... Zeitlin, C. (1988). Formation of spin-one mesons by photon-photon fusion. Physical Review D, 38(1), 1-18. https://doi.org/10.1103/PhysRevD.38.1

Formation of spin-one mesons by photon-photon fusion. / Aihara, H.; Alston-Garnjost, M.; Avery, R. E.; Barbaro-Galtieri, A.; Barker, A. R.; Barnett, B. A.; Bauer, D. A.; Bay, A.; Bengtsson, H. U.; Bobbink, G. J.; Buchanan, C. D.; Buijs, A.; Caldwell, D. O.; Chao, H. Y.; Chun, S. B.; Clark, A. R.; Cowan, G. D.; Crane, D. A.; Dahl, O. I.; Daoudi, M.; Derby, K. A.; Eastman, J. J.; Eberhard, P. H.; Edberg, T. K.; Eisner, A. M.; Enomoto, R.; Erné, F. C.; Fairfield, K. H.; Hauptman, J. M.; Hofmann, W.; Hylen, J.; Kamae, T.; Kaye, H. S.; Kenney, R. W.; Khacheryan, S.; Kofler, R. R.; Langeveld, W. G J; Layter, J. G.; Lin, W. T.; Linde, F. L.; Loken, S. C.; Lu, A.; Lynch, G. R.; Madaras, R. J.; Magnuson, B. D.; Masek, G. E.; Mathis, L. G.; Matthews, J. A J; Maxfield, S. J.; Miller, E. S.; Moses, W.; Nygren, D. R.; Oddone, P. J.; Paar, H. P.; Park, Sung Keun; Pellett, D. E.; Pripstein, M.; Ronan, M. T.; Ross, R. R.; Rouse, F. R.; Schwitkis, K. A.; Sens, J. C.; Shapiro, G.; Shen, B. C.; Slater, W. E.; Smith, J. R.; Steinman, J. S.; Stephens, R. W.; Stevenson, M. L.; Stork, D. H.; Strauss, M. G.; Sullivan, M. K.; Takahashi, T.; Toutounchi, S.; Van Tyen, R.; Vandalen, G. J.; Vernon, W.; Wagner, W.; Wang, E. M.; Wang, Y. X.; Wenzel, W. A.; Wolf, Z. R.; Yamamoto, H.; Yellin, S. J.; Zeitlin, C.

In: Physical Review D, Vol. 38, No. 1, 01.12.1988, p. 1-18.

Research output: Contribution to journalArticle

Aihara, H, Alston-Garnjost, M, Avery, RE, Barbaro-Galtieri, A, Barker, AR, Barnett, BA, Bauer, DA, Bay, A, Bengtsson, HU, Bobbink, GJ, Buchanan, CD, Buijs, A, Caldwell, DO, Chao, HY, Chun, SB, Clark, AR, Cowan, GD, Crane, DA, Dahl, OI, Daoudi, M, Derby, KA, Eastman, JJ, Eberhard, PH, Edberg, TK, Eisner, AM, Enomoto, R, Erné, FC, Fairfield, KH, Hauptman, JM, Hofmann, W, Hylen, J, Kamae, T, Kaye, HS, Kenney, RW, Khacheryan, S, Kofler, RR, Langeveld, WGJ, Layter, JG, Lin, WT, Linde, FL, Loken, SC, Lu, A, Lynch, GR, Madaras, RJ, Magnuson, BD, Masek, GE, Mathis, LG, Matthews, JAJ, Maxfield, SJ, Miller, ES, Moses, W, Nygren, DR, Oddone, PJ, Paar, HP, Park, SK, Pellett, DE, Pripstein, M, Ronan, MT, Ross, RR, Rouse, FR, Schwitkis, KA, Sens, JC, Shapiro, G, Shen, BC, Slater, WE, Smith, JR, Steinman, JS, Stephens, RW, Stevenson, ML, Stork, DH, Strauss, MG, Sullivan, MK, Takahashi, T, Toutounchi, S, Van Tyen, R, Vandalen, GJ, Vernon, W, Wagner, W, Wang, EM, Wang, YX, Wenzel, WA, Wolf, ZR, Yamamoto, H, Yellin, SJ & Zeitlin, C 1988, 'Formation of spin-one mesons by photon-photon fusion', Physical Review D, vol. 38, no. 1, pp. 1-18. https://doi.org/10.1103/PhysRevD.38.1
Aihara H, Alston-Garnjost M, Avery RE, Barbaro-Galtieri A, Barker AR, Barnett BA et al. Formation of spin-one mesons by photon-photon fusion. Physical Review D. 1988 Dec 1;38(1):1-18. https://doi.org/10.1103/PhysRevD.38.1
Aihara, H. ; Alston-Garnjost, M. ; Avery, R. E. ; Barbaro-Galtieri, A. ; Barker, A. R. ; Barnett, B. A. ; Bauer, D. A. ; Bay, A. ; Bengtsson, H. U. ; Bobbink, G. J. ; Buchanan, C. D. ; Buijs, A. ; Caldwell, D. O. ; Chao, H. Y. ; Chun, S. B. ; Clark, A. R. ; Cowan, G. D. ; Crane, D. A. ; Dahl, O. I. ; Daoudi, M. ; Derby, K. A. ; Eastman, J. J. ; Eberhard, P. H. ; Edberg, T. K. ; Eisner, A. M. ; Enomoto, R. ; Erné, F. C. ; Fairfield, K. H. ; Hauptman, J. M. ; Hofmann, W. ; Hylen, J. ; Kamae, T. ; Kaye, H. S. ; Kenney, R. W. ; Khacheryan, S. ; Kofler, R. R. ; Langeveld, W. G J ; Layter, J. G. ; Lin, W. T. ; Linde, F. L. ; Loken, S. C. ; Lu, A. ; Lynch, G. R. ; Madaras, R. J. ; Magnuson, B. D. ; Masek, G. E. ; Mathis, L. G. ; Matthews, J. A J ; Maxfield, S. J. ; Miller, E. S. ; Moses, W. ; Nygren, D. R. ; Oddone, P. J. ; Paar, H. P. ; Park, Sung Keun ; Pellett, D. E. ; Pripstein, M. ; Ronan, M. T. ; Ross, R. R. ; Rouse, F. R. ; Schwitkis, K. A. ; Sens, J. C. ; Shapiro, G. ; Shen, B. C. ; Slater, W. E. ; Smith, J. R. ; Steinman, J. S. ; Stephens, R. W. ; Stevenson, M. L. ; Stork, D. H. ; Strauss, M. G. ; Sullivan, M. K. ; Takahashi, T. ; Toutounchi, S. ; Van Tyen, R. ; Vandalen, G. J. ; Vernon, W. ; Wagner, W. ; Wang, E. M. ; Wang, Y. X. ; Wenzel, W. A. ; Wolf, Z. R. ; Yamamoto, H. ; Yellin, S. J. ; Zeitlin, C. / Formation of spin-one mesons by photon-photon fusion. In: Physical Review D. 1988 ; Vol. 38, No. 1. pp. 1-18.
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abstract = "We have observed the formation of two spin-one mesons in fusion reactions in which one photon was highly virtual. The first, consistent with being the JPC=1++ f1(1285), was seen in the final state - , as was the (958). We have previously reported the observation of the second spin-one state, the X(1420), in the final state KKS0 (KS0'+-). The formation of this state, which may be the f1(1420) observed in hadronic interactions, is reanalyzed using a new model and more data. We consider whether the X(1420) could be the partner of the f1(1285) in the JPC=1++ meson nonet. The * width of each resonance was determined in several Q2 bins. Using a model due to Cahn with a form factor, we obtained for the coupling parameter (f1(1285)) the value 2.40.50.5 keV. We also found B(X(1420)KK)(X(1420))=1.3z0.50.3 keV using a form factor, or 0.630.240.15 keV using a form factor. The decay distributions of the observed X(1420) events are consistent with a decay proceeding via K*(892)K, and favor positive, but do not exclude negative, parity. Assuming that the X(1420) and the f1(1285) are members of the same qq meson nonet and that B(X(1420)KK)1, and using a form factor in the model for X(1420) formation, we determined the singlet-octet mixing angle of that nonet. The result, (45.46.2)°, agrees well with the 42.2°implied by the Gell-MannOkubo quadratic mass formula; it is farther from the 35.3°ideal mixing angle. Our results are thus consistent with the X(1420) being the mostly ss isoscalar member of the axial-vector qq meson nonet; however, we have no evidence contrary to hypotheses that the X(1420) is an exotic q2q 2 or qqg state.",
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T1 - Formation of spin-one mesons by photon-photon fusion

AU - Aihara, H.

AU - Alston-Garnjost, M.

AU - Avery, R. E.

AU - Barbaro-Galtieri, A.

AU - Barker, A. R.

AU - Barnett, B. A.

AU - Bauer, D. A.

AU - Bay, A.

AU - Bengtsson, H. U.

AU - Bobbink, G. J.

AU - Buchanan, C. D.

AU - Buijs, A.

AU - Caldwell, D. O.

AU - Chao, H. Y.

AU - Chun, S. B.

AU - Clark, A. R.

AU - Cowan, G. D.

AU - Crane, D. A.

AU - Dahl, O. I.

AU - Daoudi, M.

AU - Derby, K. A.

AU - Eastman, J. J.

AU - Eberhard, P. H.

AU - Edberg, T. K.

AU - Eisner, A. M.

AU - Enomoto, R.

AU - Erné, F. C.

AU - Fairfield, K. H.

AU - Hauptman, J. M.

AU - Hofmann, W.

AU - Hylen, J.

AU - Kamae, T.

AU - Kaye, H. S.

AU - Kenney, R. W.

AU - Khacheryan, S.

AU - Kofler, R. R.

AU - Langeveld, W. G J

AU - Layter, J. G.

AU - Lin, W. T.

AU - Linde, F. L.

AU - Loken, S. C.

AU - Lu, A.

AU - Lynch, G. R.

AU - Madaras, R. J.

AU - Magnuson, B. D.

AU - Masek, G. E.

AU - Mathis, L. G.

AU - Matthews, J. A J

AU - Maxfield, S. J.

AU - Miller, E. S.

AU - Moses, W.

AU - Nygren, D. R.

AU - Oddone, P. J.

AU - Paar, H. P.

AU - Park, Sung Keun

AU - Pellett, D. E.

AU - Pripstein, M.

AU - Ronan, M. T.

AU - Ross, R. R.

AU - Rouse, F. R.

AU - Schwitkis, K. A.

AU - Sens, J. C.

AU - Shapiro, G.

AU - Shen, B. C.

AU - Slater, W. E.

AU - Smith, J. R.

AU - Steinman, J. S.

AU - Stephens, R. W.

AU - Stevenson, M. L.

AU - Stork, D. H.

AU - Strauss, M. G.

AU - Sullivan, M. K.

AU - Takahashi, T.

AU - Toutounchi, S.

AU - Van Tyen, R.

AU - Vandalen, G. J.

AU - Vernon, W.

AU - Wagner, W.

AU - Wang, E. M.

AU - Wang, Y. X.

AU - Wenzel, W. A.

AU - Wolf, Z. R.

AU - Yamamoto, H.

AU - Yellin, S. J.

AU - Zeitlin, C.

PY - 1988/12/1

Y1 - 1988/12/1

N2 - We have observed the formation of two spin-one mesons in fusion reactions in which one photon was highly virtual. The first, consistent with being the JPC=1++ f1(1285), was seen in the final state - , as was the (958). We have previously reported the observation of the second spin-one state, the X(1420), in the final state KKS0 (KS0'+-). The formation of this state, which may be the f1(1420) observed in hadronic interactions, is reanalyzed using a new model and more data. We consider whether the X(1420) could be the partner of the f1(1285) in the JPC=1++ meson nonet. The * width of each resonance was determined in several Q2 bins. Using a model due to Cahn with a form factor, we obtained for the coupling parameter (f1(1285)) the value 2.40.50.5 keV. We also found B(X(1420)KK)(X(1420))=1.3z0.50.3 keV using a form factor, or 0.630.240.15 keV using a form factor. The decay distributions of the observed X(1420) events are consistent with a decay proceeding via K*(892)K, and favor positive, but do not exclude negative, parity. Assuming that the X(1420) and the f1(1285) are members of the same qq meson nonet and that B(X(1420)KK)1, and using a form factor in the model for X(1420) formation, we determined the singlet-octet mixing angle of that nonet. The result, (45.46.2)°, agrees well with the 42.2°implied by the Gell-MannOkubo quadratic mass formula; it is farther from the 35.3°ideal mixing angle. Our results are thus consistent with the X(1420) being the mostly ss isoscalar member of the axial-vector qq meson nonet; however, we have no evidence contrary to hypotheses that the X(1420) is an exotic q2q 2 or qqg state.

AB - We have observed the formation of two spin-one mesons in fusion reactions in which one photon was highly virtual. The first, consistent with being the JPC=1++ f1(1285), was seen in the final state - , as was the (958). We have previously reported the observation of the second spin-one state, the X(1420), in the final state KKS0 (KS0'+-). The formation of this state, which may be the f1(1420) observed in hadronic interactions, is reanalyzed using a new model and more data. We consider whether the X(1420) could be the partner of the f1(1285) in the JPC=1++ meson nonet. The * width of each resonance was determined in several Q2 bins. Using a model due to Cahn with a form factor, we obtained for the coupling parameter (f1(1285)) the value 2.40.50.5 keV. We also found B(X(1420)KK)(X(1420))=1.3z0.50.3 keV using a form factor, or 0.630.240.15 keV using a form factor. The decay distributions of the observed X(1420) events are consistent with a decay proceeding via K*(892)K, and favor positive, but do not exclude negative, parity. Assuming that the X(1420) and the f1(1285) are members of the same qq meson nonet and that B(X(1420)KK)1, and using a form factor in the model for X(1420) formation, we determined the singlet-octet mixing angle of that nonet. The result, (45.46.2)°, agrees well with the 42.2°implied by the Gell-MannOkubo quadratic mass formula; it is farther from the 35.3°ideal mixing angle. Our results are thus consistent with the X(1420) being the mostly ss isoscalar member of the axial-vector qq meson nonet; however, we have no evidence contrary to hypotheses that the X(1420) is an exotic q2q 2 or qqg state.

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U2 - 10.1103/PhysRevD.38.1

DO - 10.1103/PhysRevD.38.1

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