Measurement of the decay KL → π0γγ

A. Alavi-Harati, I. F. Albuquerque, T. Alexopoulos, M. Arenton, K. Arisaka, S. Averitte, A. R. Barker, L. Bellantoni, A. Bellavance, J. Belz, R. Ben-David, D. R. Bergman, E. Blucher, G. J. Bock, C. Bown, S. Bright, Elliott C Cheu, S. Childress, R. Coleman, M. D. CorcoranG. Corti, B. Cox, M. B. Crisler, A. R. Erwin, R. Ford, A. Golossanov, G. Graham, J. Graham, K. Hagan, E. Halkiadakis, K. Hanagaki, S. Hidaka, Y. B. Hsiung, V. Jejer, J. Jennings, D. A. Jensen, R. Kessler, H. G E Kobrak, J. LaDue, A. Lath, A. Ledovskoy, P. L. McBride, A. P. McManus, P. Mikelsons, E. Monnier, T. Nakaya, U. Nauenberg, K. S. Nelson, H. Nguyen, V. O'Dell, M. Pang, R. Pordes, V. Prasad, C. Qiao, B. Quinn, E. J. Ramberg, R. E. Ray, A. Roodman, M. Sadamoto, S. Schnetzer, K. Senyo, P. Shanahan, P. S. Shawhan, W. Slater, N. Solomey, S. V. Somalwar, R. L. Stone, I. Suzuki, E. C. Swallow, R. A. Swanson, S. A. Taegar, R. J. Tesarek, G. B. Thomson, P. A. Toale, A. Tripathi, R. Tschirhart, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, B. Winstein, R. Winston, J. Y. Wu, T. Yamanaka, E. D. Zimmerman

Research output: Contribution to journalArticle

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Abstract

We report on a new measurement of the decay KL → π0γγ by the KTeV experiment at Fermilab. We determine the KL → π0γγ branching ratio to be (1.68 ± 0.07 ± 0.08) × 10-6. Our data show the first evidence for a low-mass γγ signal as predicted by recent script O sign(p6) chiral perturbation calculations which include vector meson exchange contributions. From our data, we extract a value for the effective vector coupling aV = -0.72 ± 0.05 ± 0.06.

Original languageEnglish (US)
Pages (from-to)917-921
Number of pages5
JournalPhysical Review Letters
Volume83
Issue number5
StatePublished - Aug 2 1999

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vector mesons
perturbation
decay

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Alavi-Harati, A., Albuquerque, I. F., Alexopoulos, T., Arenton, M., Arisaka, K., Averitte, S., ... Zimmerman, E. D. (1999). Measurement of the decay KL → π0γγ. Physical Review Letters, 83(5), 917-921.

Measurement of the decay KL → π0γγ. / Alavi-Harati, A.; Albuquerque, I. F.; Alexopoulos, T.; Arenton, M.; Arisaka, K.; Averitte, S.; Barker, A. R.; Bellantoni, L.; Bellavance, A.; Belz, J.; Ben-David, R.; Bergman, D. R.; Blucher, E.; Bock, G. J.; Bown, C.; Bright, S.; Cheu, Elliott C; Childress, S.; Coleman, R.; Corcoran, M. D.; Corti, G.; Cox, B.; Crisler, M. B.; Erwin, A. R.; Ford, R.; Golossanov, A.; Graham, G.; Graham, J.; Hagan, K.; Halkiadakis, E.; Hanagaki, K.; Hidaka, S.; Hsiung, Y. B.; Jejer, V.; Jennings, J.; Jensen, D. A.; Kessler, R.; Kobrak, H. G E; LaDue, J.; Lath, A.; Ledovskoy, A.; McBride, P. L.; McManus, A. P.; Mikelsons, P.; Monnier, E.; Nakaya, T.; Nauenberg, U.; Nelson, K. S.; Nguyen, H.; O'Dell, V.; Pang, M.; Pordes, R.; Prasad, V.; Qiao, C.; Quinn, B.; Ramberg, E. J.; Ray, R. E.; Roodman, A.; Sadamoto, M.; Schnetzer, S.; Senyo, K.; Shanahan, P.; Shawhan, P. S.; Slater, W.; Solomey, N.; Somalwar, S. V.; Stone, R. L.; Suzuki, I.; Swallow, E. C.; Swanson, R. A.; Taegar, S. A.; Tesarek, R. J.; Thomson, G. B.; Toale, P. A.; Tripathi, A.; Tschirhart, R.; Wah, Y. W.; Wang, J.; White, H. B.; Whitmore, J.; Winstein, B.; Winston, R.; Wu, J. Y.; Yamanaka, T.; Zimmerman, E. D.

In: Physical Review Letters, Vol. 83, No. 5, 02.08.1999, p. 917-921.

Research output: Contribution to journalArticle

Alavi-Harati, A, Albuquerque, IF, Alexopoulos, T, Arenton, M, Arisaka, K, Averitte, S, Barker, AR, Bellantoni, L, Bellavance, A, Belz, J, Ben-David, R, Bergman, DR, Blucher, E, Bock, GJ, Bown, C, Bright, S, Cheu, EC, Childress, S, Coleman, R, Corcoran, MD, Corti, G, Cox, B, Crisler, MB, Erwin, AR, Ford, R, Golossanov, A, Graham, G, Graham, J, Hagan, K, Halkiadakis, E, Hanagaki, K, Hidaka, S, Hsiung, YB, Jejer, V, Jennings, J, Jensen, DA, Kessler, R, Kobrak, HGE, LaDue, J, Lath, A, Ledovskoy, A, McBride, PL, McManus, AP, Mikelsons, P, Monnier, E, Nakaya, T, Nauenberg, U, Nelson, KS, Nguyen, H, O'Dell, V, Pang, M, Pordes, R, Prasad, V, Qiao, C, Quinn, B, Ramberg, EJ, Ray, RE, Roodman, A, Sadamoto, M, Schnetzer, S, Senyo, K, Shanahan, P, Shawhan, PS, Slater, W, Solomey, N, Somalwar, SV, Stone, RL, Suzuki, I, Swallow, EC, Swanson, RA, Taegar, SA, Tesarek, RJ, Thomson, GB, Toale, PA, Tripathi, A, Tschirhart, R, Wah, YW, Wang, J, White, HB, Whitmore, J, Winstein, B, Winston, R, Wu, JY, Yamanaka, T & Zimmerman, ED 1999, 'Measurement of the decay KL → π0γγ', Physical Review Letters, vol. 83, no. 5, pp. 917-921.
Alavi-Harati A, Albuquerque IF, Alexopoulos T, Arenton M, Arisaka K, Averitte S et al. Measurement of the decay KL → π0γγ. Physical Review Letters. 1999 Aug 2;83(5):917-921.
Alavi-Harati, A. ; Albuquerque, I. F. ; Alexopoulos, T. ; Arenton, M. ; Arisaka, K. ; Averitte, S. ; Barker, A. R. ; Bellantoni, L. ; Bellavance, A. ; Belz, J. ; Ben-David, R. ; Bergman, D. R. ; Blucher, E. ; Bock, G. J. ; Bown, C. ; Bright, S. ; Cheu, Elliott C ; Childress, S. ; Coleman, R. ; Corcoran, M. D. ; Corti, G. ; Cox, B. ; Crisler, M. B. ; Erwin, A. R. ; Ford, R. ; Golossanov, A. ; Graham, G. ; Graham, J. ; Hagan, K. ; Halkiadakis, E. ; Hanagaki, K. ; Hidaka, S. ; Hsiung, Y. B. ; Jejer, V. ; Jennings, J. ; Jensen, D. A. ; Kessler, R. ; Kobrak, H. G E ; LaDue, J. ; Lath, A. ; Ledovskoy, A. ; McBride, P. L. ; McManus, A. P. ; Mikelsons, P. ; Monnier, E. ; Nakaya, T. ; Nauenberg, U. ; Nelson, K. S. ; Nguyen, H. ; O'Dell, V. ; Pang, M. ; Pordes, R. ; Prasad, V. ; Qiao, C. ; Quinn, B. ; Ramberg, E. J. ; Ray, R. E. ; Roodman, A. ; Sadamoto, M. ; Schnetzer, S. ; Senyo, K. ; Shanahan, P. ; Shawhan, P. S. ; Slater, W. ; Solomey, N. ; Somalwar, S. V. ; Stone, R. L. ; Suzuki, I. ; Swallow, E. C. ; Swanson, R. A. ; Taegar, S. A. ; Tesarek, R. J. ; Thomson, G. B. ; Toale, P. A. ; Tripathi, A. ; Tschirhart, R. ; Wah, Y. W. ; Wang, J. ; White, H. B. ; Whitmore, J. ; Winstein, B. ; Winston, R. ; Wu, J. Y. ; Yamanaka, T. ; Zimmerman, E. D. / Measurement of the decay KL → π0γγ. In: Physical Review Letters. 1999 ; Vol. 83, No. 5. pp. 917-921.
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AU - Alavi-Harati, A.

AU - Albuquerque, I. F.

AU - Alexopoulos, T.

AU - Arenton, M.

AU - Arisaka, K.

AU - Averitte, S.

AU - Barker, A. R.

AU - Bellantoni, L.

AU - Bellavance, A.

AU - Belz, J.

AU - Ben-David, R.

AU - Bergman, D. R.

AU - Blucher, E.

AU - Bock, G. J.

AU - Bown, C.

AU - Bright, S.

AU - Cheu, Elliott C

AU - Childress, S.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Corti, G.

AU - Cox, B.

AU - Crisler, M. B.

AU - Erwin, A. R.

AU - Ford, R.

AU - Golossanov, A.

AU - Graham, G.

AU - Graham, J.

AU - Hagan, K.

AU - Halkiadakis, E.

AU - Hanagaki, K.

AU - Hidaka, S.

AU - Hsiung, Y. B.

AU - Jejer, V.

AU - Jennings, J.

AU - Jensen, D. A.

AU - Kessler, R.

AU - Kobrak, H. G E

AU - LaDue, J.

AU - Lath, A.

AU - Ledovskoy, A.

AU - McBride, P. L.

AU - McManus, A. P.

AU - Mikelsons, P.

AU - Monnier, E.

AU - Nakaya, T.

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AU - Nelson, K. S.

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AU - O'Dell, V.

AU - Pang, M.

AU - Pordes, R.

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AU - Qiao, C.

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AU - Ramberg, E. J.

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AU - Schnetzer, S.

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AU - Shanahan, P.

AU - Shawhan, P. S.

AU - Slater, W.

AU - Solomey, N.

AU - Somalwar, S. V.

AU - Stone, R. L.

AU - Suzuki, I.

AU - Swallow, E. C.

AU - Swanson, R. A.

AU - Taegar, S. A.

AU - Tesarek, R. J.

AU - Thomson, G. B.

AU - Toale, P. A.

AU - Tripathi, A.

AU - Tschirhart, R.

AU - Wah, Y. W.

AU - Wang, J.

AU - White, H. B.

AU - Whitmore, J.

AU - Winstein, B.

AU - Winston, R.

AU - Wu, J. Y.

AU - Yamanaka, T.

AU - Zimmerman, E. D.

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N2 - We report on a new measurement of the decay KL → π0γγ by the KTeV experiment at Fermilab. We determine the KL → π0γγ branching ratio to be (1.68 ± 0.07 ± 0.08) × 10-6. Our data show the first evidence for a low-mass γγ signal as predicted by recent script O sign(p6) chiral perturbation calculations which include vector meson exchange contributions. From our data, we extract a value for the effective vector coupling aV = -0.72 ± 0.05 ± 0.06.

AB - We report on a new measurement of the decay KL → π0γγ by the KTeV experiment at Fermilab. We determine the KL → π0γγ branching ratio to be (1.68 ± 0.07 ± 0.08) × 10-6. Our data show the first evidence for a low-mass γγ signal as predicted by recent script O sign(p6) chiral perturbation calculations which include vector meson exchange contributions. From our data, we extract a value for the effective vector coupling aV = -0.72 ± 0.05 ± 0.06.

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