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First Observation of the Decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>L</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi /><mml:mo>→</mml:mo><mml:mi /><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">e</mml:mi></mml:mrow><mml:mrow><mml:…

A. Alavi-Harati,Theodoros Alexopoulos,M. W. 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,E. Cheu,S. Childress,R. Coleman,M. Corcoran,G. Corti,B. Cox,M. Crisler,A. R. Erwin,R. Ford,A. Glazov,A. Golossanov,G. Graham,J. Graham,K. Hagan,Eva Halkiadakis,J. Hamm,Kazunori Hanagaki,S. Hidaka,Y. B. Hsiung,V. Jejer,D. A. Jensen,R. Keßler,H. G. E. Kobrak,J. LaDue,Amitabh Lath,Alexander Ledovskoy,Patricia Mcbride,P. Mikelsons,Emmanuel Monnier,T. Nakaya,K. S. Nelson,H. Nguyen,Vivian O’Dell,M. Pang,R. Pordes,V. Prasad,B. Quinn,E. Ramberg,R. E. Ray,A. Roodman,M. Sadamoto,S. Schnetzer,K. Senyo,P. Shanahan,P. Shawhan,Joseph C. Shields,W. Slater,N. Solomey,Sunil Somalwar,Robert Stone,I. Suzuki,E. C. Swallow,S. A. Taegar,R. J. Tesarek,G. B. Thomson,P. A. Toale,A. Tripathi,R. Tschirhart,S. E. Turner,T. Uchizawa,Y. W. Wah,J. Wang,H. B. White,J. Whitmore,B. Winstein,R. Winston,T. Yamanaka,E. D. Zimmerman

Computer science

Physics

2001

We report on the first observation of the decay KL -> pi0 ee gamma by the KTeV E799 experiment at Fermilab. Based upon a sample of 48 events with an estimated background of 3.6 +/- 1.1 events, we measure the KL -> pi0 ee gamma branching ratio to be (2.34 +/- 0.35 +/- 0.13)x10^{-8}. Our data agree with recent O(p^6) calculations in chiral perturbation theory that include contributions from vector meson exchange through the parameter a_V. A fit was made to the KL -> pi0 ee gamma data for a_V with the result -0.67 +/- 0.21 +/- 0.12, which is consistent with previous results from KTeV.

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“First Observation of the Decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>L</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi /><mml:mo>→</mml:mo><mml:mi /><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">e</mml:mi></mml:mrow><mml:mrow><mml:…” is a paper by A. Alavi-Harati Theodoros Alexopoulos M. W. 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 E. Cheu S. Childress R. Coleman M. Corcoran G. Corti B. Cox M. Crisler A. R. Erwin R. Ford A. Glazov A. Golossanov G. Graham J. Graham K. Hagan Eva Halkiadakis J. Hamm Kazunori Hanagaki S. Hidaka Y. B. Hsiung V. Jejer D. A. Jensen R. Keßler H. G. E. Kobrak J. LaDue Amitabh Lath Alexander Ledovskoy Patricia Mcbride P. Mikelsons Emmanuel Monnier T. Nakaya K. S. Nelson H. Nguyen Vivian O’Dell M. Pang R. Pordes V. Prasad B. Quinn E. Ramberg R. E. Ray A. Roodman M. Sadamoto S. Schnetzer K. Senyo P. Shanahan P. Shawhan Joseph C. Shields W. Slater N. Solomey Sunil Somalwar Robert Stone I. Suzuki E. C. Swallow S. A. Taegar R. J. Tesarek G. B. Thomson P. A. Toale A. Tripathi R. Tschirhart S. E. Turner T. Uchizawa Y. W. Wah J. Wang H. B. White J. Whitmore B. Winstein R. Winston T. Yamanaka E. D. Zimmerman published in 2001. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.