Journal articles
Precision measurement of the ratio BR(K_s→ π^+ π^- e^+ e^- )BR (K_L→π^+ π^- π_D^0)
J.R. Batley
G.E. Kalmus
C. Lazzeroni
D.J. Munday
M. Patel
M.W. Slater
S.A. Wotton
R. Arcidiacono
G. Bocquet
A. Ceccucci
D. Cundy
N. Doble
V. Falaleev
L. Gatignon
A. Gonidec
P. Grafström
W. Kubischta
F. Marchetto
I. Mikulec
A. Norton
B. Panzer-Steindel
P. Rubin
H. Wahl
E. Goudzovski
P. Hristov
V. Kekelidze
V. Kozhuharov
L. Litov
D. Madigozhin
N. Molokanova
Yu. Potrebenikov
S. Stoynev
A. Zinchenko
E. Monnier
1
E.C. Swallow
R. Winston
R. Sacco
A. Walker
W. Baldini
P. Dalpiaz
P.L. Frabetti
A. Gianoli
M. Martini
F. Petrucci
M. Savrié
M. Scarpa
M. Calvetti
G. Collazuol
E. Iacopini
G. Ruggiero
A. Bizzeti
M. Lenti
M. Veltri
M. Behler
K. Eppard
M. Eppard
A. Hirstius
K. Kleinknecht
U. Koch
P. Marouelli
L. Masetti
U. Moosbrugger
C. Morales Morales
A. Peters
R. Wanke
A. Winhart
A. Dabrowski
T. Fonseca Martin
M. Szleper
M. Velasco
G. Anzivino
E. Imbergamo
G. Lamanna
P. Lubrano
A. Michetti
A. Nappi
M. Piccini
M. Valdata-Nappi
P. Cenci
M. Pepe
M.C. Petrucci
C. Cerri
R. Fantechi
I. Mannelli
F. Costantini
L. Fiorini
S. Giudici
G. Pierazzini
M. Sozzi
C. Cheshkov
J.B. Chèze
M. de Beer
P. Debu
G. Gouge
G. Marel
E. Mazzucato
B. Peyaud
B. Vallage
M. Holder
A. Maier
M. Ziolkowski
C. Biino
N. Cartiglia
M. Clemencic
S. Goy Lopez
E. Menichetti
N. Pastrone
W. Wislicki
H. Dibon
M. Jeitler
M. Markytan
G. Neuhofer
L. Widhalm
L. Widhalm
Author
1
CPPM - Centre de Physique des Particules de Marseille (163, avenue de Luminy - Case 902 - 13288 Marseille cedex 09 - France)
- AMU - Aix Marseille Université : UMR7346 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR7346 (France)
Abstract : The KS→π+π−e+e− decay mode was investigated using the data collected in 2002 by the NA48/1 collaboration. With about 23 k KS→π+π−e+e− events and 59 k View the MathML source normalization decays, the KS→π+π−e+e− branching ratio relative to the View the MathML source one was determined to be View the MathML source. This result was used to set the upper limit |gE1/gBR|<3.0 at 90% CL on the presence, in the decay amplitude, of an E1 direct emission (gE1) term relative to the dominant inner bremsstrahlung (gBR) term. The CP-violating asymmetry View the MathML source in the View the MathML source distribution of KS→π+π−e+e− events, where phi is the angle between the π+π− and the e+e− decay planes in the kaon centre of mass, was found to be View the MathML source, consistent with zero. These results are in good agreement with a description of the KS→π+π−e+e− decay amplitude dominated by the CP-even inner bremsstrahlung process.
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Journal articles
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http://hal.in2p3.fr/in2p3-00525873
Contributor : Danielle Cristofol <>
Submitted on : Wednesday, October 13, 2010 - 8:51:38 AM
Last modification on : Thursday, January 18, 2018 - 1:51:16 AM
Contributor : Danielle Cristofol <>
Submitted on : Wednesday, October 13, 2010 - 8:51:38 AM
Last modification on : Thursday, January 18, 2018 - 1:51:16 AM
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- HAL Id : in2p3-00525873, version 1
- DOI : 10.1016/j.physletb.2010.10.008
Citation
J.R. Batley, G.E. Kalmus, C. Lazzeroni, D.J. Munday, M. Patel, et al.. Precision measurement of the ratio BR(K_s→ π^+ π^- e^+ e^- )BR (K_L→π^+ π^- π_D^0). Physics Letters B, Elsevier, 2011, 694, pp.301-309. ⟨10.1016/j.physletb.2010.10.008⟩. ⟨in2p3-00525873⟩
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