First observation and study of the K± → π±π0e+e− decay

The NA48/2 Collaboration

doi:10.1016/j.physletb.2018.11.046

First observation and study of the K^± → π^±π⁰e⁺e⁻ decay

The NA48/2 Collaboration

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

The NA48/2 experiment at CERN reports the first observation of the K^±→π^±π⁰e⁺e⁻ decay from an exposure of 1.7×10¹¹ 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^±π⁰e⁺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.

Lingua originale	Inglese
pagine (da-a)	552-561
Numero di pagine	10
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	788
DOI	https://doi.org/10.1016/j.physletb.2018.11.046
Stato di pubblicazione	Pubblicato - 10 gen 2019
Pubblicato esternamente	Sì

Accesso al documento

10.1016/j.physletb.2018.11.046

Altri file e collegamenti

Link to publication in Scopus

Cita questo

@article{ef7035497fba4f889c388f123648bf13,

title = "First observation and study of the K± → π±π0e+e− decay",

abstract = "The NA48/2 experiment at CERN reports the first observation of the K±→π±π0e+e− decay from an exposure of 1.7×1011 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±π0e+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 Munday, \{D. J.\} 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 A. Peters 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 E. Swallow and R. Winston and P. Rubin and A. Walker 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.",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",

year = "2019",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2018.11.046",

language = "English",

volume = "788",

pages = "552--561",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - First observation and study of the K± → π±π0e+e− decay

AU - The NA48/2 Collaboration

AU - Batley, J. R.

AU - Kalmus, G.

AU - Lazzeroni, C.

AU - Munday, D. J.

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 - Peters, A.

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 - Swallow, E.

AU - Winston, R.

AU - Rubin, P.

AU - Walker, A.

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.

PY - 2019/1/10

Y1 - 2019/1/10

N2 - The NA48/2 experiment at CERN reports the first observation of the K±→π±π0e+e− decay from an exposure of 1.7×1011 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±π0e+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±π0e+e− decay from an exposure of 1.7×1011 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±π0e+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.

UR - https://www.scopus.com/pages/publications/85058955739

U2 - 10.1016/j.physletb.2018.11.046

DO - 10.1016/j.physletb.2018.11.046

M3 - Article

SN - 0370-2693

VL - 788

SP - 552

EP - 561

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

First observation and study of the K± → π±π0e+e− decay

Abstract

Accesso al documento

Altri file e collegamenti

Fingerprint

Cita questo

First observation and study of the K^± → π^±π⁰e⁺e⁻ decay