Observation of a cusp-like structure in the π0π 0 invariant mass distribution from K±→π ±π0π0 decay and determination of the ππ scattering lengths

J. R. Batley; C. Lazzeroni; D. J. Munday; M. W. Slater; S. A. Wotton; R. Arcidiacono; G. Bocquet; N. Cabibbo; A. Ceccucci; D. Cundy; V. Falaleev; M. Fidecaro; L. Gatignon; A. Gonidec; W. Kubischta; A. Norton; M. Patel; A. Peters; S. Balev; P. L. Frabetti; E. Goudzovski; P. Hristov; V. Kekelidze; V. Kozhuharov; L. Litov; D. Madigozhin; E. Marinova; N. Molokanova; I. Polenkevich; Yu Potrebenikov; S. Stoynev; A. Zinchenko; E. Monnier; E. Swallow; R. Winston; P. Rubin; A. Walker; W. Baldini; A. Cotta Ramusino; P. Dalpiaz; C. Damiani; M. Fiorini; A. Gianoli; M. Martini; F. Petrucci; M. Savrié; M. Scarpa; H. Wahl; A. Bizzeti; M. Calvetti; E. Celeghini; E. Iacopini; M. Lenti; F. Martelli; G. Ruggiero; M. Veltri; M. Behler; K. Eppard; K. Kleinknecht; P. Marouelli; L. Masetti; U. Moosbrugger; C. Morales Morales; B. Renk; M. Wache; R. Wanke; A. Winhart; D. Coward; A. Dabrowski; T. Fonseca Martin; M. Shieh; M. Szleper; M. Velasco; M. D. Wood; G. Anzivino; P. Cenci; E. Imbergamo; M. Pepe; M. C. Petrucci; M. Piccini; M. Raggi; M. Valdata-Nappi; C. Cerri; G. Collazuol; F. Costantini; L. DiLella; N. Doble; R. Fantechi; L. Fiorini; S. Giudici; G. Lamanna; I. Mannelli; A. Michetti; G. Pierazzini; M. Sozzi; B. Bloch-Devaux; C. Cheshkov; J. B. Chèze; M. De Beer; J. Derré; G. Marel; E. Mazzucato; B. Peyaud; B. Vallage; M. Holder; A. Maier; M. Ziolkowski; S. Bifani; C. Biino; N. Cartiglia; M. Clemencic; S. Goy Lopez; F. Marchetto; H. Dibon; M. Jeitler; M. Markytan; I. Mikulec; G. Neuhofer; L. Widhalm

doi:10.1016/j.physletb.2005.11.087

Observation of a cusp-like structure in the π⁰π ⁰ invariant mass distribution from K^±→π ^±π⁰π⁰ decay and determination of the ππ scattering lengths

J. R. Batley, C. Lazzeroni, D. J. Munday, M. W. Slater, S. A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Norton, M. Patel, A. Peters, S. Balev, P. L. FrabettiE. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, E. Marinova, N. Molokanova, I. Polenkevich, Yu Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, W. Baldini, A. Cotta Ramusino, P. Dalpiaz, C. Damiani, M. Fiorini, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, A. Bizzeti, M. Calvetti, E. Celeghini, E. Iacopini, M. Lenti, F. Martelli, G. Ruggiero, M. Veltri, M. Behler, K. Eppard, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M. D. Wood, G. Anzivino, P. Cenci, E. Imbergamo, M. Pepe, M. C. Petrucci, M. Piccini, M. Raggi, M. Valdata-Nappi, C. Cerri, G. Collazuol, F. Costantini, L. DiLella, N. Doble, R. Fantechi, L. Fiorini, S. Giudici, G. Lamanna, I. Mannelli, A. Michetti, G. Pierazzini, M. Sozzi, B. Bloch-Devaux, C. Cheshkov, J. B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, S. Bifani, C. Biino, N. Cartiglia, M. Clemencic, S. Goy Lopez, F. Marchetto, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, L. Widhalm

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

Abstract

We report the results from a study of a partial sample of ∼2.3×10⁷ K^±→π ^±π⁰π⁰ decays recorded by the NA48/2 experiment at the CERN SPS, showing an anomaly in the π⁰π⁰ invariant mass (M₀₀) distribution in the region around M₀₀=2m₊, where m₊ is the charged pion mass. This anomaly, never observed in previous experiments, can be interpreted as an effect due mainly to the final state charge exchange scattering process π⁺π ^-→π⁰π⁰ in K^±→ π^±π⁺π^- decay [N. Cabibbo, Phys. Rev. Lett. 93 (2004) 121801]. It provides a precise determination of a ₀-a₂, the difference between the ππ scattering lengths in the isospin I=0 and I=2 states. A best fit to a rescattering model [N. Cabibbo, G. Isidori, JHEP 0503 (2005) 21] corrected for isospin symmetry breaking gives (a₀-a₂)m₊=0.268±0. 010(stat)±0.004(syst), with additional external uncertainties of ±0.013 from branching ratio and theoretical uncertainties. If the correlation between a0 and a2 predicted by chiral symmetry is taken into account, this result becomes (a₀-a₂)m₊=0. 264±0.006(stat)±0.004(syst)±0.013(ext).

Lingua originale	Inglese
pagine (da-a)	173-182
Numero di pagine	10
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	633
Numero di pubblicazione	2-3
DOI	https://doi.org/10.1016/j.physletb.2005.11.087
Stato di pubblicazione	Pubblicato - 9 feb 2006
Pubblicato esternamente	Sì

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10.1016/j.physletb.2005.11.087

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Batley, J. R., Lazzeroni, C., Munday, D. J., Slater, M. W., Wotton, S. A., Arcidiacono, R., Bocquet, G., Cabibbo, N., Ceccucci, A., Cundy, D., Falaleev, V., Fidecaro, M., Gatignon, L., Gonidec, A., Kubischta, W., Norton, A., Patel, M., Peters, A., Balev, S., ... Widhalm, L. (2006). Observation of a cusp-like structure in the π⁰π ⁰ invariant mass distribution from K^±→π ^±π⁰π⁰ decay and determination of the ππ scattering lengths. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 633(2-3), 173-182. https://doi.org/10.1016/j.physletb.2005.11.087

@article{96e7c15443c544059f8116124f04122e,

title = "Observation of a cusp-like structure in the π0π 0 invariant mass distribution from K±→π ±π0π0 decay and determination of the ππ scattering lengths",

abstract = "We report the results from a study of a partial sample of ∼2.3×107 K±→π ±π0π0 decays recorded by the NA48/2 experiment at the CERN SPS, showing an anomaly in the π0π0 invariant mass (M00) distribution in the region around M00=2m+, where m+ is the charged pion mass. This anomaly, never observed in previous experiments, can be interpreted as an effect due mainly to the final state charge exchange scattering process π+π -→π0π0 in K±→ π±π+π- decay [N. Cabibbo, Phys. Rev. Lett. 93 (2004) 121801]. It provides a precise determination of a 0-a2, the difference between the ππ scattering lengths in the isospin I=0 and I=2 states. A best fit to a rescattering model [N. Cabibbo, G. Isidori, JHEP 0503 (2005) 21] corrected for isospin symmetry breaking gives (a0-a2)m+=0.268±0. 010(stat)±0.004(syst), with additional external uncertainties of ±0.013 from branching ratio and theoretical uncertainties. If the correlation between a0 and a2 predicted by chiral symmetry is taken into account, this result becomes (a0-a2)m+=0. 264±0.006(stat)±0.004(syst)±0.013(ext).",

author = "Batley, {J. R.} 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. Norton and M. Patel and A. Peters and S. Balev and Frabetti, {P. L.} and E. Goudzovski and P. Hristov and V. Kekelidze and V. Kozhuharov and L. Litov and D. Madigozhin and E. Marinova 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 W. Baldini and {Cotta Ramusino}, A. and P. Dalpiaz and C. Damiani and M. Fiorini and A. Gianoli and M. Martini and F. Petrucci and M. Savri{\'e} and M. Scarpa and H. Wahl and A. Bizzeti and M. Calvetti and E. Celeghini and E. Iacopini and M. Lenti and F. Martelli and G. Ruggiero and M. Veltri and M. Behler and K. Eppard and K. Kleinknecht and P. Marouelli and L. Masetti and U. Moosbrugger and {Morales Morales}, C. and B. Renk and M. Wache and R. Wanke and A. Winhart and D. Coward and A. Dabrowski and {Fonseca Martin}, T. and M. Shieh and M. Szleper and M. Velasco and Wood, {M. D.} and G. Anzivino and P. Cenci and E. Imbergamo and M. Pepe and Petrucci, {M. C.} and M. Piccini and M. Raggi and M. Valdata-Nappi and C. Cerri and G. Collazuol and F. Costantini and L. DiLella and N. Doble and R. Fantechi and L. Fiorini and S. Giudici and G. Lamanna and I. Mannelli and A. Michetti and G. Pierazzini and M. Sozzi and B. Bloch-Devaux and C. Cheshkov and Ch{\`e}ze, {J. B.} and {De Beer}, M. and J. Derr{\'e} and G. Marel and E. Mazzucato and B. Peyaud and B. Vallage and M. Holder and A. Maier and M. Ziolkowski and S. Bifani and C. Biino and N. Cartiglia and M. Clemencic and {Goy Lopez}, S. and F. Marchetto and H. Dibon and M. Jeitler and M. Markytan and I. Mikulec and G. Neuhofer and L. Widhalm",

year = "2006",

month = feb,

day = "9",

doi = "10.1016/j.physletb.2005.11.087",

language = "English",

volume = "633",

pages = "173--182",

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

issn = "0370-2693",

publisher = "Elsevier",

number = "2-3",

}

Batley, JR, Lazzeroni, C, Munday, DJ, Slater, MW, Wotton, SA, Arcidiacono, R, Bocquet, G, Cabibbo, N, Ceccucci, A, Cundy, D, Falaleev, V, Fidecaro, M, Gatignon, L, Gonidec, A, Kubischta, W, Norton, A, Patel, M, Peters, A, Balev, S, Frabetti, PL, Goudzovski, E, Hristov, P, Kekelidze, V, Kozhuharov, V, Litov, L, Madigozhin, D, Marinova, E, Molokanova, N, Polenkevich, I, Potrebenikov, Y, Stoynev, S, Zinchenko, A, Monnier, E, Swallow, E, Winston, R, Rubin, P, Walker, A, Baldini, W, Cotta Ramusino, A, Dalpiaz, P, Damiani, C, Fiorini, M, Gianoli, A, Martini, M, Petrucci, F, Savrié, M, Scarpa, M, Wahl, H, Bizzeti, A, Calvetti, M, Celeghini, E, Iacopini, E, Lenti, M, Martelli, F, Ruggiero, G, Veltri, M, Behler, M, Eppard, K, Kleinknecht, K, Marouelli, P, Masetti, L, Moosbrugger, U, Morales Morales, C, Renk, B, Wache, M, Wanke, R, Winhart, A, Coward, D, Dabrowski, A, Fonseca Martin, T, Shieh, M, Szleper, M, Velasco, M, Wood, MD, Anzivino, G, Cenci, P, Imbergamo, E, Pepe, M, Petrucci, MC, Piccini, M, Raggi, M, Valdata-Nappi, M, Cerri, C, Collazuol, G, Costantini, F, DiLella, L, Doble, N, Fantechi, R, Fiorini, L, Giudici, S, Lamanna, G, Mannelli, I, Michetti, A, Pierazzini, G, Sozzi, M, Bloch-Devaux, B, Cheshkov, C, Chèze, JB, De Beer, M, Derré, J, Marel, G, Mazzucato, E, Peyaud, B, Vallage, B, Holder, M, Maier, A, Ziolkowski, M, Bifani, S, Biino, C, Cartiglia, N, Clemencic, M, Goy Lopez, S, Marchetto, F, Dibon, H, Jeitler, M, Markytan, M, Mikulec, I, Neuhofer, G & Widhalm, L 2006, 'Observation of a cusp-like structure in the π⁰π ⁰ invariant mass distribution from K^±→π ^±π⁰π⁰ decay and determination of the ππ scattering lengths', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 633, n. 2-3, pagg. 173-182. https://doi.org/10.1016/j.physletb.2005.11.087

Observation of a cusp-like structure in the π⁰π ⁰ invariant mass distribution from K^±→π ^±π⁰π⁰ decay and determination of the ππ scattering lengths. / Batley, J. R.; Lazzeroni, C.; Munday, D. J. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 633, N. 2-3, 09.02.2006, pag. 173-182.

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

TY - JOUR

T1 - Observation of a cusp-like structure in the π0π 0 invariant mass distribution from K±→π ±π0π0 decay and determination of the ππ scattering lengths

AU - Batley, J. R.

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 - Norton, A.

AU - Patel, M.

AU - Peters, A.

AU - Balev, S.

AU - Frabetti, P. L.

AU - Goudzovski, E.

AU - Hristov, P.

AU - Kekelidze, V.

AU - Kozhuharov, V.

AU - Litov, L.

AU - Madigozhin, D.

AU - Marinova, E.

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 - Baldini, W.

AU - Cotta Ramusino, A.

AU - Dalpiaz, P.

AU - Damiani, C.

AU - Fiorini, M.

AU - Gianoli, A.

AU - Martini, M.

AU - Petrucci, F.

AU - Savrié, M.

AU - Scarpa, M.

AU - Wahl, H.

AU - Bizzeti, A.

AU - Calvetti, M.

AU - Celeghini, E.

AU - Iacopini, E.

AU - Lenti, M.

AU - Martelli, F.

AU - Ruggiero, G.

AU - Veltri, M.

AU - Behler, M.

AU - Eppard, K.

AU - Kleinknecht, K.

AU - Marouelli, P.

AU - Masetti, L.

AU - Moosbrugger, U.

AU - Morales Morales, C.

AU - Renk, B.

AU - Wache, M.

AU - Wanke, R.

AU - Winhart, A.

AU - Coward, D.

AU - Dabrowski, A.

AU - Fonseca Martin, T.

AU - Shieh, M.

AU - Szleper, M.

AU - Velasco, M.

AU - Wood, M. D.

AU - Anzivino, G.

AU - Cenci, P.

AU - Imbergamo, E.

AU - Pepe, M.

AU - Petrucci, M. C.

AU - Piccini, M.

AU - Raggi, M.

AU - Valdata-Nappi, M.

AU - Cerri, C.

AU - Collazuol, G.

AU - Costantini, F.

AU - DiLella, L.

AU - Doble, N.

AU - Fantechi, R.

AU - Fiorini, L.

AU - Giudici, S.

AU - Lamanna, G.

AU - Mannelli, I.

AU - Michetti, A.

AU - Pierazzini, G.

AU - Sozzi, M.

AU - Bloch-Devaux, B.

AU - Cheshkov, C.

AU - Chèze, J. B.

AU - De Beer, M.

AU - Derré, J.

AU - Marel, G.

AU - Mazzucato, E.

AU - Peyaud, B.

AU - Vallage, B.

AU - Holder, M.

AU - Maier, A.

AU - Ziolkowski, M.

AU - Bifani, S.

AU - Biino, C.

AU - Cartiglia, N.

AU - Clemencic, M.

AU - Goy Lopez, S.

AU - Marchetto, F.

AU - Dibon, H.

AU - Jeitler, M.

AU - Markytan, M.

AU - Mikulec, I.

AU - Neuhofer, G.

AU - Widhalm, L.

PY - 2006/2/9

Y1 - 2006/2/9

N2 - We report the results from a study of a partial sample of ∼2.3×107 K±→π ±π0π0 decays recorded by the NA48/2 experiment at the CERN SPS, showing an anomaly in the π0π0 invariant mass (M00) distribution in the region around M00=2m+, where m+ is the charged pion mass. This anomaly, never observed in previous experiments, can be interpreted as an effect due mainly to the final state charge exchange scattering process π+π -→π0π0 in K±→ π±π+π- decay [N. Cabibbo, Phys. Rev. Lett. 93 (2004) 121801]. It provides a precise determination of a 0-a2, the difference between the ππ scattering lengths in the isospin I=0 and I=2 states. A best fit to a rescattering model [N. Cabibbo, G. Isidori, JHEP 0503 (2005) 21] corrected for isospin symmetry breaking gives (a0-a2)m+=0.268±0. 010(stat)±0.004(syst), with additional external uncertainties of ±0.013 from branching ratio and theoretical uncertainties. If the correlation between a0 and a2 predicted by chiral symmetry is taken into account, this result becomes (a0-a2)m+=0. 264±0.006(stat)±0.004(syst)±0.013(ext).

AB - We report the results from a study of a partial sample of ∼2.3×107 K±→π ±π0π0 decays recorded by the NA48/2 experiment at the CERN SPS, showing an anomaly in the π0π0 invariant mass (M00) distribution in the region around M00=2m+, where m+ is the charged pion mass. This anomaly, never observed in previous experiments, can be interpreted as an effect due mainly to the final state charge exchange scattering process π+π -→π0π0 in K±→ π±π+π- decay [N. Cabibbo, Phys. Rev. Lett. 93 (2004) 121801]. It provides a precise determination of a 0-a2, the difference between the ππ scattering lengths in the isospin I=0 and I=2 states. A best fit to a rescattering model [N. Cabibbo, G. Isidori, JHEP 0503 (2005) 21] corrected for isospin symmetry breaking gives (a0-a2)m+=0.268±0. 010(stat)±0.004(syst), with additional external uncertainties of ±0.013 from branching ratio and theoretical uncertainties. If the correlation between a0 and a2 predicted by chiral symmetry is taken into account, this result becomes (a0-a2)m+=0. 264±0.006(stat)±0.004(syst)±0.013(ext).

UR - http://www.scopus.com/inward/record.url?scp=30944449770&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2005.11.087

DO - 10.1016/j.physletb.2005.11.087

M3 - Article

SN - 0370-2693

VL - 633

SP - 173

EP - 182

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 - 2-3

ER -