Measurement of the ratio Γ (KL → π+ π-) / Γ (KL → π± e∓ ν) and extraction of the CP violation parameter | η+ - |

A. Lai; D. Marras; A. Bevan; R. S. Dosanjh; T. J. Gershon; B. Hay; G. E. Kalmus; C. Lazzeroni; D. J. Munday; E. Olaiya; M. A. Parker; T. O. White; S. A. Wotton; G. Barr; G. Bocquet; A. Ceccucci; T. Cuhadar-Dönszelmann; D. Cundy; G. D'Agostini; N. Doble; V. Falaleev; L. Gatignon; A. Gonidec; B. Gorini; G. Govi; P. Grafström; W. Kubischta; A. Lacourt; A. Norton; S. Palestini; B. Panzer-Steindel; H. Taureg; M. Velasco; H. Wahl; C. Cheshkov; A. Gaponenko; P. Hristov; V. Kekelidze; L. Litov; D. Madigozhin; N. Molokanova; Yu Potrebenikov; S. Stoynev; G. Tatishvili; A. Tkatchev; A. Zinchenko; I. Knowles; V. Martin; R. Sacco; A. Walker; M. Contalbrigo; P. Dalpiaz; J. Duclos; P. L. Frabetti; A. Gianoli; M. Martini; F. Petrucci; M. Savrié; A. Bizzeti; M. Calvetti; G. Collazuol; G. Graziani; E. Iacopini; M. Lenti; F. Martelli; M. Veltri; H. G. Becker; K. Eppard; M. Eppard; H. Fox; A. Kalter; K. Kleinknecht; U. Koch; L. Köpke; P. Lopes da Silva; P. Marouelli; I. Pellmann; A. Peters; B. Renk; S. A. Schmidt; V. Schönharting; Y. Schué; R. Wanke; A. Winhart; M. Wittgen; J. C. Chollet; L. Fayard; L. Iconomidou-Fayard; J. Ocariz; G. Unal; I. Wingerter-Seez; G. Anzivino; P. Cenci; E. Imbergamo; P. Lubrano; A. Mestvirishvili; A. Nappi; M. Pepe; M. Piccini; L. Bertanza; R. Carosi; C. Cerri; M. Cirilli; F. Costantini; R. Fantechi; S. Giudici; I. Mannelli; G. Pierazzini; M. Sozzi; J. B. Cheze; J. Cogan; M. De Beer; P. Debu; A. Formica; R. Granier de Cassagnac; E. Mazzucato; B. Peyaud; R. Turlay; B. Vallage; M. Holder; A. Maier; M. Ziolkowski; R. Arcidiacono; C. Biino; N. Cartiglia; R. Guida; F. Marchetto; E. Menichetti; N. Pastrone; J. Nassalski; E. Rondio; M. Szleper; W. Wislicki; S. Wronka; H. Dibon; G. Fischer; M. Jeitler; M. Markytan; I. Mikulec; G. Neuhofer; M. Pernicka; A. Taurok; L. Widhalm

doi:10.1016/j.physletb.2006.11.071

Measurement of the ratio Γ (K_L → π⁺ π^-) / Γ (K_L → π^± e^∓ ν) and extraction of the CP violation parameter | η_{+ -} |

A. Lai, D. Marras, A. Bevan, R. S. Dosanjh, T. J. Gershon, B. Hay, G. E. Kalmus, C. Lazzeroni, D. J. Munday, E. Olaiya, M. A. Parker, T. O. White, S. A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar-Dönszelmann, D. Cundy, G. D'Agostini, N. DobleV. Falaleev, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, A. Norton, S. Palestini, B. Panzer-Steindel, H. Taureg, M. Velasco, H. Wahl, C. Cheshkov, A. Gaponenko, P. Hristov, V. Kekelidze, L. Litov, D. Madigozhin, N. Molokanova, Yu Potrebenikov, S. Stoynev, G. Tatishvili, A. Tkatchev, A. Zinchenko, I. Knowles, V. Martin, R. Sacco, A. Walker, M. Contalbrigo, P. Dalpiaz, J. Duclos, P. L. Frabetti, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, M. Lenti, F. Martelli, M. Veltri, H. G. Becker, K. Eppard, M. Eppard, H. Fox, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Marouelli, I. Pellmann, A. Peters, B. Renk, S. A. Schmidt, V. Schönharting, Y. Schué, R. Wanke, A. Winhart^*, M. Wittgen, J. C. Chollet, L. Fayard, L. Iconomidou-Fayard, J. Ocariz, G. Unal, I. Wingerter-Seez, G. Anzivino, P. Cenci, E. Imbergamo, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, L. Bertanza, R. Carosi, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, S. Giudici, I. Mannelli, G. Pierazzini, M. Sozzi, J. B. Cheze, J. Cogan, M. De Beer, P. Debu, A. Formica, R. Granier de Cassagnac, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, R. Guida, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, G. Fischer, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, M. Pernicka, A. Taurok, L. Widhalm

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

We present a measurement of the ratio of the decay rates Γ (K_L → π⁺ π^-) / Γ (K_L → π^± e^∓ ν), denoted as Γ_{K 2 π} / Γ_{K e 3}. The analysis is based on data taken during a dedicated run in 1999 by the NA48 experiment at the CERN SPS. Using a sample of 47 000 K_{2 π} and five million K_{e 3} decays, we find Γ_{K 2 π} / Γ_{K e 3} = (4.835 ± 0.022_{stat .} ± 0.016_{syst .}) × 10^-3. From this we derive the branching ratio of the CP violating decay K_L → π⁺ π^- and the CP violation parameter | η_{+ -} |. Excluding the CP conserving direct photon emission component K_L → π⁺ π^- γ, we obtain the results BR (K_L → π⁺ π^-) = (1.941 ± 0.019) × 10^-3 and | η_{+ -} | = (2.223 ± 0.012) × 10^-3.

Original language	English (US)
Pages (from-to)	26-35
Number of pages	10
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	645
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2006.11.071
State	Published - Feb 1 2007

Keywords

CP violation
Kaon decays

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2006.11.071

Cite this

Lai, A., Marras, D., Bevan, A., Dosanjh, R. S., Gershon, T. J., Hay, B., Kalmus, G. E., Lazzeroni, C., Munday, D. J., Olaiya, E., Parker, M. A., White, T. O., Wotton, S. A., Barr, G., Bocquet, G., Ceccucci, A., Cuhadar-Dönszelmann, T., Cundy, D., D'Agostini, G., ... Widhalm, L. (2007). Measurement of the ratio Γ (K_L → π⁺ π^-) / Γ (K_L → π^± e^∓ ν) and extraction of the CP violation parameter | η_{+ -} |. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 645(1), 26-35. https://doi.org/10.1016/j.physletb.2006.11.071

@article{d7215b8b89df49b288c0ad84657aac1b,

title = "Measurement of the ratio Γ (KL → π+ π-) / Γ (KL → π± e∓ ν) and extraction of the CP violation parameter | η+ - |",

abstract = "We present a measurement of the ratio of the decay rates Γ (KL → π+ π-) / Γ (KL → π± e∓ ν), denoted as ΓK 2 π / ΓK e 3. The analysis is based on data taken during a dedicated run in 1999 by the NA48 experiment at the CERN SPS. Using a sample of 47 000 K2 π and five million Ke 3 decays, we find ΓK 2 π / ΓK e 3 = (4.835 ± 0.022stat . ± 0.016syst .) × 10-3. From this we derive the branching ratio of the CP violating decay KL → π+ π- and the CP violation parameter | η+ - |. Excluding the CP conserving direct photon emission component KL → π+ π- γ, we obtain the results BR (KL → π+ π-) = (1.941 ± 0.019) × 10-3 and | η+ - | = (2.223 ± 0.012) × 10-3.",

keywords = "CP violation, Kaon decays",

author = "A. Lai and D. Marras and A. Bevan and Dosanjh, {R. S.} and Gershon, {T. J.} and B. Hay and Kalmus, {G. E.} and C. Lazzeroni and Munday, {D. J.} and E. Olaiya and Parker, {M. A.} and White, {T. O.} and Wotton, {S. A.} and G. Barr and G. Bocquet and A. Ceccucci and T. Cuhadar-D{\"o}nszelmann and D. Cundy and G. D'Agostini and N. Doble and V. Falaleev and L. Gatignon and A. Gonidec and B. Gorini and G. Govi and P. Grafstr{\"o}m and W. Kubischta and A. Lacourt and A. Norton and S. Palestini and B. Panzer-Steindel and H. Taureg and M. Velasco and H. Wahl and C. Cheshkov and A. Gaponenko and P. Hristov and V. Kekelidze and L. Litov and D. Madigozhin and N. Molokanova and Yu Potrebenikov and S. Stoynev and G. Tatishvili and A. Tkatchev and A. Zinchenko and I. Knowles and V. Martin and R. Sacco and A. Walker and M. Contalbrigo and P. Dalpiaz and J. Duclos and Frabetti, {P. L.} and A. Gianoli and M. Martini and F. Petrucci and M. Savri{\'e} and A. Bizzeti and M. Calvetti and G. Collazuol and G. Graziani and E. Iacopini and M. Lenti and F. Martelli and M. Veltri and Becker, {H. G.} and K. Eppard and M. Eppard and H. Fox and A. Kalter and K. Kleinknecht and U. Koch and L. K{\"o}pke and {Lopes da Silva}, P. and P. Marouelli and I. Pellmann and A. Peters and B. Renk and Schmidt, {S. A.} and V. Sch{\"o}nharting and Y. Schu{\'e} and R. Wanke and A. Winhart and M. Wittgen and Chollet, {J. C.} and L. Fayard and L. Iconomidou-Fayard and J. Ocariz and G. Unal and I. Wingerter-Seez and G. Anzivino and P. Cenci and E. Imbergamo and P. Lubrano and A. Mestvirishvili and A. Nappi and M. Pepe and M. Piccini and L. Bertanza and R. Carosi and C. Cerri and M. Cirilli and F. Costantini and R. Fantechi and S. Giudici and I. Mannelli and G. Pierazzini and M. Sozzi and Cheze, {J. B.} and J. Cogan and {De Beer}, M. and P. Debu and A. Formica and {Granier de Cassagnac}, R. and E. Mazzucato and B. Peyaud and R. Turlay and B. Vallage and M. Holder and A. Maier and M. Ziolkowski and R. Arcidiacono and C. Biino and N. Cartiglia and R. Guida and F. Marchetto and E. Menichetti and N. Pastrone and J. Nassalski and E. Rondio and M. Szleper and W. Wislicki and S. Wronka and H. Dibon and G. Fischer and M. Jeitler and M. Markytan and I. Mikulec and G. Neuhofer and M. Pernicka and A. Taurok and L. Widhalm",

year = "2007",

month = feb,

day = "1",

doi = "10.1016/j.physletb.2006.11.071",

language = "English (US)",

volume = "645",

pages = "26--35",

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

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1",

}

Lai, A, Marras, D, Bevan, A, Dosanjh, RS, Gershon, TJ, Hay, B, Kalmus, GE, Lazzeroni, C, Munday, DJ, Olaiya, E, Parker, MA, White, TO, Wotton, SA, Barr, G, Bocquet, G, Ceccucci, A, Cuhadar-Dönszelmann, T, Cundy, D, D'Agostini, G, Doble, N, Falaleev, V, Gatignon, L, Gonidec, A, Gorini, B, Govi, G, Grafström, P, Kubischta, W, Lacourt, A, Norton, A, Palestini, S, Panzer-Steindel, B, Taureg, H, Velasco, M, Wahl, H, Cheshkov, C, Gaponenko, A, Hristov, P, Kekelidze, V, Litov, L, Madigozhin, D, Molokanova, N, Potrebenikov, Y, Stoynev, S, Tatishvili, G, Tkatchev, A, Zinchenko, A, Knowles, I, Martin, V, Sacco, R, Walker, A, Contalbrigo, M, Dalpiaz, P, Duclos, J, Frabetti, PL, Gianoli, A, Martini, M, Petrucci, F, Savrié, M, Bizzeti, A, Calvetti, M, Collazuol, G, Graziani, G, Iacopini, E, Lenti, M, Martelli, F, Veltri, M, Becker, HG, Eppard, K, Eppard, M, Fox, H, Kalter, A, Kleinknecht, K, Koch, U, Köpke, L, Lopes da Silva, P, Marouelli, P, Pellmann, I, Peters, A, Renk, B, Schmidt, SA, Schönharting, V, Schué, Y, Wanke, R, Winhart, A, Wittgen, M, Chollet, JC, Fayard, L, Iconomidou-Fayard, L, Ocariz, J, Unal, G, Wingerter-Seez, I, Anzivino, G, Cenci, P, Imbergamo, E, Lubrano, P, Mestvirishvili, A, Nappi, A, Pepe, M, Piccini, M, Bertanza, L, Carosi, R, Cerri, C, Cirilli, M, Costantini, F, Fantechi, R, Giudici, S, Mannelli, I, Pierazzini, G, Sozzi, M, Cheze, JB, Cogan, J, De Beer, M, Debu, P, Formica, A, Granier de Cassagnac, R, Mazzucato, E, Peyaud, B, Turlay, R, Vallage, B, Holder, M, Maier, A, Ziolkowski, M, Arcidiacono, R, Biino, C, Cartiglia, N, Guida, R, Marchetto, F, Menichetti, E, Pastrone, N, Nassalski, J, Rondio, E, Szleper, M, Wislicki, W, Wronka, S, Dibon, H, Fischer, G, Jeitler, M, Markytan, M, Mikulec, I, Neuhofer, G, Pernicka, M, Taurok, A & Widhalm, L 2007, 'Measurement of the ratio Γ (K_L → π⁺ π^-) / Γ (K_L → π^± e^∓ ν) and extraction of the CP violation parameter | η_{+ -} |', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 645, no. 1, pp. 26-35. https://doi.org/10.1016/j.physletb.2006.11.071

TY - JOUR

T1 - Measurement of the ratio Γ (KL → π+ π-) / Γ (KL → π± e∓ ν) and extraction of the CP violation parameter | η+ - |

AU - Lai, A.

AU - Marras, D.

AU - Bevan, A.

AU - Dosanjh, R. S.

AU - Gershon, T. J.

AU - Hay, B.

AU - Kalmus, G. E.

AU - Lazzeroni, C.

AU - Munday, D. J.

AU - Olaiya, E.

AU - Parker, M. A.

AU - White, T. O.

AU - Wotton, S. A.

AU - Barr, G.

AU - Bocquet, G.

AU - Ceccucci, A.

AU - Cuhadar-Dönszelmann, T.

AU - Cundy, D.

AU - D'Agostini, G.

AU - Doble, N.

AU - Falaleev, V.

AU - Gatignon, L.

AU - Gonidec, A.

AU - Gorini, B.

AU - Govi, G.

AU - Grafström, P.

AU - Kubischta, W.

AU - Lacourt, A.

AU - Norton, A.

AU - Palestini, S.

AU - Panzer-Steindel, B.

AU - Taureg, H.

AU - Velasco, M.

AU - Wahl, H.

AU - Cheshkov, C.

AU - Gaponenko, A.

AU - Hristov, P.

AU - Kekelidze, V.

AU - Litov, L.

AU - Madigozhin, D.

AU - Molokanova, N.

AU - Potrebenikov, Yu

AU - Stoynev, S.

AU - Tatishvili, G.

AU - Tkatchev, A.

AU - Zinchenko, A.

AU - Knowles, I.

AU - Martin, V.

AU - Sacco, R.

AU - Walker, A.

AU - Contalbrigo, M.

AU - Dalpiaz, P.

AU - Duclos, J.

AU - Frabetti, P. L.

AU - Gianoli, A.

AU - Martini, M.

AU - Petrucci, F.

AU - Savrié, M.

AU - Bizzeti, A.

AU - Calvetti, M.

AU - Collazuol, G.

AU - Graziani, G.

AU - Iacopini, E.

AU - Lenti, M.

AU - Martelli, F.

AU - Veltri, M.

AU - Becker, H. G.

AU - Eppard, K.

AU - Eppard, M.

AU - Fox, H.

AU - Kalter, A.

AU - Kleinknecht, K.

AU - Koch, U.

AU - Köpke, L.

AU - Lopes da Silva, P.

AU - Marouelli, P.

AU - Pellmann, I.

AU - Peters, A.

AU - Renk, B.

AU - Schmidt, S. A.

AU - Schönharting, V.

AU - Schué, Y.

AU - Wanke, R.

AU - Winhart, A.

AU - Wittgen, M.

AU - Chollet, J. C.

AU - Fayard, L.

AU - Iconomidou-Fayard, L.

AU - Ocariz, J.

AU - Unal, G.

AU - Wingerter-Seez, I.

AU - Anzivino, G.

AU - Cenci, P.

AU - Imbergamo, E.

AU - Lubrano, P.

AU - Mestvirishvili, A.

AU - Nappi, A.

AU - Pepe, M.

AU - Piccini, M.

AU - Bertanza, L.

AU - Carosi, R.

AU - Cerri, C.

AU - Cirilli, M.

AU - Costantini, F.

AU - Fantechi, R.

AU - Giudici, S.

AU - Mannelli, I.

AU - Pierazzini, G.

AU - Sozzi, M.

AU - Cheze, J. B.

AU - Cogan, J.

AU - De Beer, M.

AU - Debu, P.

AU - Formica, A.

AU - Granier de Cassagnac, R.

AU - Mazzucato, E.

AU - Peyaud, B.

AU - Turlay, R.

AU - Vallage, B.

AU - Holder, M.

AU - Maier, A.

AU - Ziolkowski, M.

AU - Arcidiacono, R.

AU - Biino, C.

AU - Cartiglia, N.

AU - Guida, R.

AU - Marchetto, F.

AU - Menichetti, E.

AU - Pastrone, N.

AU - Nassalski, J.

AU - Rondio, E.

AU - Szleper, M.

AU - Wislicki, W.

AU - Wronka, S.

AU - Dibon, H.

AU - Fischer, G.

AU - Jeitler, M.

AU - Markytan, M.

AU - Mikulec, I.

AU - Neuhofer, G.

AU - Pernicka, M.

AU - Taurok, A.

AU - Widhalm, L.

PY - 2007/2/1

Y1 - 2007/2/1

N2 - We present a measurement of the ratio of the decay rates Γ (KL → π+ π-) / Γ (KL → π± e∓ ν), denoted as ΓK 2 π / ΓK e 3. The analysis is based on data taken during a dedicated run in 1999 by the NA48 experiment at the CERN SPS. Using a sample of 47 000 K2 π and five million Ke 3 decays, we find ΓK 2 π / ΓK e 3 = (4.835 ± 0.022stat . ± 0.016syst .) × 10-3. From this we derive the branching ratio of the CP violating decay KL → π+ π- and the CP violation parameter | η+ - |. Excluding the CP conserving direct photon emission component KL → π+ π- γ, we obtain the results BR (KL → π+ π-) = (1.941 ± 0.019) × 10-3 and | η+ - | = (2.223 ± 0.012) × 10-3.

AB - We present a measurement of the ratio of the decay rates Γ (KL → π+ π-) / Γ (KL → π± e∓ ν), denoted as ΓK 2 π / ΓK e 3. The analysis is based on data taken during a dedicated run in 1999 by the NA48 experiment at the CERN SPS. Using a sample of 47 000 K2 π and five million Ke 3 decays, we find ΓK 2 π / ΓK e 3 = (4.835 ± 0.022stat . ± 0.016syst .) × 10-3. From this we derive the branching ratio of the CP violating decay KL → π+ π- and the CP violation parameter | η+ - |. Excluding the CP conserving direct photon emission component KL → π+ π- γ, we obtain the results BR (KL → π+ π-) = (1.941 ± 0.019) × 10-3 and | η+ - | = (2.223 ± 0.012) × 10-3.

KW - CP violation

KW - Kaon decays

UR - http://www.scopus.com/inward/record.url?scp=33846291750&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846291750&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2006.11.071

DO - 10.1016/j.physletb.2006.11.071

M3 - Article

AN - SCOPUS:33846291750

SN - 0370-2693

VL - 645

SP - 26

EP - 35

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

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

IS - 1

ER -