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First observation and study of the K ±  → π ± π 0 e + e decay

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First observation and study of the K ±  → π ± π 0 e + e decay. / The NA48/2 Collaboration.

In: Physics Letters B, Vol. 788, 10.01.2019, p. 552-561.

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The NA48/2 Collaboration. / First observation and study of the K ±  → π ± π 0 e + e decay. In: Physics Letters B. 2019 ; Vol. 788. pp. 552-561.

Bibtex

@article{02a902e383154554b498f2f9471f8df3,
title = "First observation and study of the K ±  → π ± π 0 e + e − decay",
abstract = " The NA48/2 experiment at CERN reports the first observation of the K ± →π ± π 0 e + e − decay from an exposure of 1.7×10 11 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR(K ± →π ± π 0 e + e − )=(4.24±0.14)×10 −6 . The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated. ",
author = "{The NA48/2 Collaboration} and Batley, {J. R.} and G. Kalmus and C. Lazzeroni and Slater, {M. W.} and Wotton, {S. A.} and R. Arcidiacono and G. Bocquet and N. Cabibbo and A. Ceccucci and D. Cundy and V. Falaleev and M. Fidecaro and L. Gatignon and A. Gonidec and W. Kubischta and A. Maier and A. Norton and M. Patel and S. Balev and Frabetti, {P. L.} and E. Gersabeck and E. Goudzovski and P. Hristov and V. Kekelidze and V. Kozhuharov and L. Litov and D. Madigozhin and M. Misheva and N. Molokanova and I. Polenkevich and Yu Potrebenikov and S. Stoynev and A. Zinchenko and E. Monnier and R. Winston and P. Rubin and P. Dalpiaz and C. Damiani and M. Fiorini and M. Martini and F. Petrucci and M. Savri{\'e} and M. Scarpa and H. Wahl and W. Baldini and {Cotta Ramusino}, A. and A. Gianoli and M. Calvetti and E. Celeghini and G. Ruggiero",
year = "2019",
month = jan,
day = "10",
doi = "10.1016/j.physletb.2018.11.046",
language = "English",
volume = "788",
pages = "552--561",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",

}

RIS

TY - JOUR

T1 - First observation and study of the K ±  → π ± π 0 e + e − decay

AU - The NA48/2 Collaboration

AU - Batley, J. R.

AU - Kalmus, G.

AU - Lazzeroni, C.

AU - Slater, M. W.

AU - Wotton, S. A.

AU - Arcidiacono, R.

AU - Bocquet, G.

AU - Cabibbo, N.

AU - Ceccucci, A.

AU - Cundy, D.

AU - Falaleev, V.

AU - Fidecaro, M.

AU - Gatignon, L.

AU - Gonidec, A.

AU - Kubischta, W.

AU - Maier, A.

AU - Norton, A.

AU - Patel, M.

AU - Balev, S.

AU - Frabetti, P. L.

AU - Gersabeck, E.

AU - Goudzovski, E.

AU - Hristov, P.

AU - Kekelidze, V.

AU - Kozhuharov, V.

AU - Litov, L.

AU - Madigozhin, D.

AU - Misheva, M.

AU - Molokanova, N.

AU - Polenkevich, I.

AU - Potrebenikov, Yu

AU - Stoynev, S.

AU - Zinchenko, A.

AU - Monnier, E.

AU - Winston, R.

AU - Rubin, P.

AU - Dalpiaz, P.

AU - Damiani, C.

AU - Fiorini, M.

AU - Martini, M.

AU - Petrucci, F.

AU - Savrié, M.

AU - Scarpa, M.

AU - Wahl, H.

AU - Baldini, W.

AU - Cotta Ramusino, A.

AU - Gianoli, A.

AU - Calvetti, M.

AU - Celeghini, E.

AU - Ruggiero, G.

PY - 2019/1/10

Y1 - 2019/1/10

N2 - The NA48/2 experiment at CERN reports the first observation of the K ± →π ± π 0 e + e − decay from an exposure of 1.7×10 11 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR(K ± →π ± π 0 e + e − )=(4.24±0.14)×10 −6 . The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated.

AB - The NA48/2 experiment at CERN reports the first observation of the K ± →π ± π 0 e + e − decay from an exposure of 1.7×10 11 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR(K ± →π ± π 0 e + e − )=(4.24±0.14)×10 −6 . The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated.

U2 - 10.1016/j.physletb.2018.11.046

DO - 10.1016/j.physletb.2018.11.046

M3 - Journal article

AN - SCOPUS:85058955739

VL - 788

SP - 552

EP - 561

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

ER -