Precise measurement of the K+- --> pi+-e+e- decay

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

Dataset

Description

CERN-NA-048. A sample of 7253 $K^\pm\to\pi^\pm e^+e^-(\gamma)$ decay candidates with 1.0% background contamination has been collected by the NA48/2 experiment at the CERN SPS, allowing a precise measurement of the decay properties. The branching ratio in the full kinematic range was measured to be ${\rm BR}=(3.11\pm0.12)\times 10^{-7}$, where the uncertainty includes also the model dependence. The shape of the form factor $W(z)$, where $z=(M_{ee}/M_K)^2$, was parameterized according to several models, and, in particular, the slope $\delta$ of the linear form factor $W(z)=W_0(1+\delta z)$ was determined to be $\delta=2.32\pm0.18$. A possible CP violating asymmetry of $K^+$ and $K^-$ decay widths was investigated, and a conservative upper limit of $2.1\times 10^{-2}$ at 90% CL was established.
Date made available2015
PublisherHEPData
  • Precise measurement of the K ± → π ± e + e - decay

    Batley, J. R., Culling, A. J., Kalmus, G., 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., Maier, A., Patel, M., & 103 othersPeters, A., Balev, S., Frabetti, P. L., 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., Ramusino, A. C., 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, C. M., Renk, B., Wache, M., Wanke, R., Winhart, A., Coward, D., Dabrowski, A., Martin, T. F., Shieh, M., Szleper, M., Velasco, M., Wood, M. D., Anzivino, G., Cenci, P., Imbergamo, E., Nappi, A., Pepe, M., Petrucci, M. C., Piccini, M., Raggi, M., Valdata-Nappi, M., Cerri, C., Fantechi, R., Collazuol, G., DiLella, L., Lamanna, G., Mannelli, I., Michetti, A., Costantini, F., Doble, N., Fiorini, L., Giudici, S., Pierazzini, G., Sozzi, M., Venditti, S., Bloch-Devaux, B., Cheshkov, C., Chèze, J. B., De Beer, M., Derré, J., Marel, G., Mazzucato, E., Peyaud, B., Vallage, B., Holder, M., Ziolkowski, M., Bifani, S., Biino, C., Cartiglia, N., Clemencic, M., Lopez, S. G., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G. & Widhalm, L., Jun 29 2009, In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 677, 5, p. 246-254 9 p.

    Research output: Contribution to journalArticlepeer-review

    85 Scopus citations

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