Search

Your search keyword '"Swallow, E."' showing total 596 results
Start Over Author "Swallow, E."
596 results on '"Swallow, E."'

1. First observation and study of the $K^{\pm} \rightarrow \pi^{0} \pi^{0} \mu^{\pm} \nu$ decay

Author

Collaboration, NA48/2, Batley, J. R., Kalmus, G., Lazzeroni, C., Munday, D. J., Slater, M. W., Wotton, S. A., Arcidiacono, R., Ceccucci, A., Bocquet, G., Cabibbo, N., Cundy, D., Falaleev, V., Gatignon, L., Fidecaro, M., Gonidec, A., Kubischta, W., Maier, A., Norton, A., Patel, M., Peters, A., Balev, S., Frabetti, P. L., Gersabeck, E., Goudzovski, E., Hristov, P., Kekelidze, V., Madigozhin, D., Molokanova, N., Polenkevich, I., Potrebenikov, Yu., Korotkova, A., Stoynev, S., Zinchenko, A., Kozhuharov, V., Litov, L., Monnier, E., Swallow, E., Winston, R., Rubin, P., Walker, A., Baldini, W., Ramusino, A. Cotta, Dalpiaz, P., Damiani, C., Fiorini, M., Gianoli, A., Martini, M., Petrucci, F., Savrié, M., Scarpa, M., Wahl, H., Bizzeti, A., Veltri, M., Calvetti, M., Celeghini, E., Iacopini, E., Lenti, M., Ruggiero, G., Behler, M., Eppard, K., Hita-Hochgesand, M., Kleinknecht, K., Marouelli, P., Masetti, L., Moosbrugger, U., Morales, C. Morales, Renk, B., Wache, M., Winhart, A., Wanke, R., Coward, D., Dabrowski, A., Martin, T. Fonseca, Shieh, M., Szleper, M., Velasco, M., Wood, M. D., Cenci, P., Pepe, M., Petrucci, M. C., Anzivino, G., Imbergamo, E., Nappi, A., Piccini, M., Raggi, M., Valdata-Nappi, M., Cerri, C., Fantechi, R., Collazuol, G., Di Lella, L., Lamanna, G., Mannelli, I., Michetti, A., Costantini, F., Doble, N., Fiorini, L., Giudici, S., Pierazzini, G., Sozzi, M., Venditti, S., Bloch-Devaux, B., Peyaud, B., Cheshkov, C., Chèze, J. B., De Beer, M., Derré, J., Marel, G., Mazzucato, E., Vallage, B., Holder, M., Ziolkowski, M., Biino, C., Cartiglia, N., Marchetto, F., Bifani, S., Clemencic, M., Lopez, S. Goy, Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., and Widhalm, L.

Subjects
High Energy Physics - Experiment
Abstract

The NA48/2 experiment at CERN reports the first observation of the $K^{\pm} \rightarrow \pi^{0} \pi^{0} \mu^{\pm} \nu$ decay based on a sample of 2437 candidates with 15% background contamination collected in 2003--2004. The decay branching ratio in the kinematic region of the squared dilepton mass above $0.03$~GeV$^2/c^4$ is measured to be $(0.65 \pm 0.03) \times 10^{-6}$. The extrapolation to the full kinematic space, using a specific model, is found to be $(3.45 \pm 0.16) \times 10^{-6}$, in agreement with chiral perturbation theory predictions., Comment: 16 pages, 9 figures

Published
2023
Full Text
View/download PDF

2. First observation and study of the K±→ π0π0μ±ν decay

Author

Batley, J. R., 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., Maier, A., Norton, A., Patel, M., Peters, A., Monnier, E., Swallow, E., Winston, R., Rubin, P., Walker, A., Dalpiaz, P., Damiani, C., Fiorini, M., Martini, M., Petrucci, F., Savrié, M., Scarpa, M., Wahl, H., Baldini, W., Cotta Ramusino, A., Gianoli, A., Calvetti, M., Celeghini, E., Iacopini, E., Lenti, M., Ruggiero, G., Bizzeti, A., Veltri, M., Behler, M., Eppard, K., Hita-Hochgesand, M., 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, M. D., Anzivino, G., Imbergamo, E., Nappi, A., Piccini, M., Raggi, M., Valdata-Nappi, M., Cenci, P., Pepe, M., Petrucci, M. C., Costantini, F., Doble, N., Fiorini, L., Giudici, S., Pierazzini, G., Sozzi, M., Venditti, S., Collazuol, G., Di Lella, L., Lamanna, G., Mannelli, I., Michetti, A., Cerri, C., Fantechi, R., 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., Clemencic, M., Goy Lopez, S., Biino, C., Cartiglia, N., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., Widhalm, L., Balev, S., Frabetti, P. L., Gersabeck, E., Goudzovski, E., Hristov, P., Kekelidze, V., Korotkova, A., Kozhuharov, V., Litov, L., Madigozhin, D., Molokanova, N., Polenkevich, I., Potrebenikov, Yu., Stoynev, S., and Zinchenko, A.

Published
2024
Full Text
View/download PDF

3. A Measurement of the Branching Ratio of $\pi^0$ Dalitz Decay using $K_L \rightarrow \pi^0\pi^0\pi^0$ Decays

Author

Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kotera, K., Ledovskoy, A., McBride, P. L., Monnier, E., Nguyen, H., Niclasen, R., Phillips II, D. G., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M. J., Winstein, B., Winston, R., Worcester, E. T., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

We present a measurement of $B(\pi^0 \rightarrow e^+e^- \gamma)/B(\pi^0 \rightarrow \gamma\gamma)$, the Dalitz branching ratio, using data taken in 1999 by the E832 KTeV experiment at Fermi National Accelerator Laboratory. We use neutral pions from fully reconstructed $K_L$ decays in flight; the measurement is based on about 60 thousand $K_L \rightarrow \pi^0\pi^0\pi^0 \rightarrow \gamma\gamma~\gamma\gamma~e^+e^-\gamma$ decays. We normalize to $K_L \rightarrow \pi^0\pi^0\pi^0 \rightarrow 6\gamma$ decays. We find $B(\pi^0 \rightarrow e^+e^- \gamma)/B(\pi^0 \rightarrow \gamma\gamma)$ $(m_{e^+e^-}$ > 15 MeV/$c^2)$ = $[3.920 \pm 0.016(stat) \pm 0.036 (syst)] \times 10^{-3}$. Using the Mikaelian and Smith prediction for the $e^+e^-$ mass spectrum, we correct the result to the full $e^+e^-$ mass range. The corrected result is $B(\pi^0 \rightarrow e^+e^- \gamma)/B(\pi^0 \rightarrow \gamma\gamma) = [1.1559 \pm 0.0047(stat) \pm 0.0106 (syst)]$%. This result is consistent with previous measurements and the uncertainty is a factor of three smaller than any previous measurement., Comment: 11 pages, 7 figures; v2 accepted version

Published
2019
Full Text
View/download PDF

5. ChPT tests at the NA48 and NA62 experiments at CERN

Author

NA48/2, Collaborations, NA62, Ambrosino, F., Antonelli, A., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J. R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch-Devaux, B., Bocquet, G., Bolotov, V., Bucci, F., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Cenci, P., Cerri, C., Cheshkov, C., Chèze, J. B., Clemencic, M., Collazuol, G., Costantini, F., Ramusino, A. Cotta, Coward, D., Cundy, D., Dabrowski, A., D'Agostini, G., Dalpiaz, P., Damiani, C., Danielsson, H., De Beer, M., Dellacasa, G., Derré, J., Dibon, H., Di Filippo, D., DiLella, L., Doble, N., Duk, V., Engelfried, J., Eppard, K., Falaleev, V., Fantechi, R., Fidecaro, M., Fiorini, L., Fiorini, M., Martin, T. Fonseca, Frabetti, P. L., Fucci, A., Gallorini, S., Gatignon, L., Gersabeck, E., Gianoli, A., Giudici, S., Gonidec, A., Goudzovski, E., Lopez, S. Goy, Gushchin, E., Hallgren, B., Hita-Hochgesand, M., Holder, M., Hristov, P., Iacopini, E., Imbergamo, E., Jeitler, M., Kalmus, G., Kekelidze, V., Kleinknecht, K., Kozhuharov, V., Kubischta, W., Kurshetsov, V., Lamanna, G., Lazzeroni, C., Lenti, M., Leonardi, E., Litov, L., Madigozhin, D., Maier, A., Mannelli, I., Marchetto, F., Marel, G., Markytan, M., Marouelli, P., Martini, M., Masetti, L., Massarotti, P., Mazzucato, E., Michetti, A., Mikulec, I., Misheva, M., Molokanova, N., Monnier, E., Moosbrugger, U., Morales, C. Morales, Moulson, M., Movchan, S., Munday, D. J., Napolitano, M., Nappi, A., Neuhofer, G., Norton, A., Numao, T., Obraztsov, V., Palladino, V., Patel, M., Pepe, M., Peters, A., Petrucci, F., Petrucci, M. C., Peyaud, B., Piandani, R., Piccini, M., Pierazzini, G., Polenkevich, I., Popov, I., Potrebenikov, Yu., Raggi, M., Renk, B., Retière, F., Riedler, P., Romano, A., Rubin, P., Ruggiero, G., Salamon, A., Saracino, G., Savrié, M., Scarpa, M., Semenov, V., Sergi, A., Serra, M., Shieh, M., Shkarovskiy, S., Slater, M. W., Sozzi, M., Spadaro, T., Stoynev, S., Swallow, E., Szleper, M., Valdata-Nappi, M., Valente, P., Vallage, B., Velasco, M., Veltri, M., Venditti, S., Wache, M., Wahl, H., Walker, A., Wanke, R., Widhalm, L., Winhart, A., Winston, R., Wood, M. D., Wotton, S. A., Yushchenko, O., Zinchenko, A., and Ziolkowski, M.

Subjects
High Energy Physics - Experiment
Abstract

The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) ($K^\pm \to \pi^+ \pi^- e^\pm \nu$) and Ke4(00) ($K^\pm \to \pi^0 \pi^0 e^\pm \nu$) with nearly one percent background contamination. The detailed study of form factors and branching rates, based on these data, has been completed recently. The results brings new inputs to low energy strong interactions description and tests of Chiral Perturbation Theory (ChPT) and lattice QCD calculations. In particular, new data support the ChPT prediction for a cusp in the $\pi^0\pi^0$ invariant mass spectrum at the two charged pions threshold for Ke4(00) decay. New final results from an analysis of about 400 $K^\pm \to \pi^\pm \gamma \gamma$ rare decay candidates collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to ChPT description., Comment: XIIth International Conference on Heavy Quarks and Leptons 2014, Mainz, Germany

Published
2016

6. Recent NA48/2 and NA62 results

Author

Ambrosino, F., Antonelli, A., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J. R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch-Devaux, B., Bocquet, G., Bolotov, V., Bucci, F., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Cenci, P., Cerri, C., Cheshkov, C., Cheze, J. B., Clemencic, M., Collazuol, G., Costantini, F., Ramusino, A. Cotta, Coward, D., Cundy, D., Dabrowski, A., D'Agostini, G., Dalpiaz, P., Damiani, C., Danielsson, H., De Beer, M., Dellacasa, G., Derre, J., Dibon, H., Di Filippo, D., DiLella, L., Doble, N., Duk, V., Engelfried, J., Eppard, K., Falaleev, V., Fantechi, R., Fidecaro, M., Fiorini, L., Fiorini, M., Martin, T. Fonseca, Frabetti, P. L., Fucci, A., Gallorini, S., Gatignon, L., Gersabeck, E., Gianoli, A., Giudici, S., Gonidec, A., Goudzovski, E., Lopez, S. Goy, Gushchin, E., Hallgren, B., Hita-Hochgesand, M., Holder, M., Hristov, P., Iacopini, E., Imbergamo, E., Jeitler, M., Kalmus, G., Kekelidze, V., Kleinknecht, K., Kozhuharov, V., Kubischta, W., Kurshetsov, V., Lamanna, G., Lazzeroni, C., Lenti, M., Leonardi, E., Litov, L., Madigozhin, D., Maier, A., Mannelli, I., Marchetto, F., Marel, G., Markytan, M., Marouelli, P., Martini, M., Masetti, L., Massarotti, P., Mazzucato, E., Michetti, A., Mikulec, I., Misheva, M., Molokanova, N., Monnier, E., Moosbrugger, U., Morales, C. Morales, Moulson, M., Movchan, S., Munday, D. J., Napolitano, M., Nappi, A., Neuhofer, G., Norton, A., Numao, T., Obraztsov, V., Palladino, V., Patel, M., Pepe, M., Peters, A., Petrucci, F., Petrucci, M. C., Peyaud, B., Piandani, R., Piccini, M., Pierazzini, G., Polenkevich, I., Popov, I., Potrebenikov, Yu., Raggi, M., Renk, B., Retiere, F., Riedler, P., Romano, A., Rubin, P., Ruggiero, G., Salamon, A., Saracino, G., Savrie, M., Scarpa, M., Semenov, V., Sergi, A., Serra, M., Shieh, M., Shkarovskiy, S., Slater, M. W., Sozzi, M., Spadaro, T., Stoynev, S., Swallow, E., Szleper, M., Valdata-Nappi, M., Valente, P., Vallage, B., Velasco, M., Veltri, M., Venditti, S., Wache, M., Wahl, H., Walker, A., Wanke, R., Widhalm, L., Winhart, A., Winston, R., Wood, M. D., Wotton, S. A., Yushchenko, O., Zinchenko, A., and Ziolkowski, M.

Subjects
High Energy Physics - Experiment
Abstract

The NA48/2 Collaboration at CERN has accumulated and analysed unprecedented statistics of rare kaon decays in the $K_{e4}$ modes: $K_{e4}(+-)$ ($K^\pm \to \pi^+ \pi^- e^\pm \nu$) and $K_{e4}(00)$ ($K^\pm \to \pi^0 \pi^0 e^\pm \nu$) with nearly one percent background contamination. It leads to the improved measurement of branching fractions and detailed form factor studies. New final results from the analysis of 381 $K^\pm \to \pi^\pm \gamma \gamma$ rare decay candidates collected by the NA48/2 and NA62 experiments at CERN are presented. The results include a decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description., Comment: Prepared for the Proceedings of "Moriond QCD and High Energy Interactions. March 22-29 2014." conference

Published
2014

7. Measurement of the branching ratio of the decay $\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$

Author

Batley, J. R., Kalmus, G. E., Lazzeroni, C., Munday, D. J., Patel, M., Slater, M. W., Wotton, S. A., Arcidiacono, R., Bocquet, G., Ceccucci, A., Cundy, D., Doble, N., Falaleev, V., Gatignon, L., Gonidec, A., Grafstrom, P., Kubischta, W., Marchetto, F., Mikulec, I., Norton, A., Panzer-Steindel, B., Rubin, P., Wahl, H., Goudzovski, E., Hristov, P., Kekelidze, V., Kozhuharov, V., Litov, L., Madigozhin, D., Molokanova, N., Potrebenikov, Yu., Stoynev, S., Zinchenko, A., Monnier, E., Swallow, E. C., Winston, R., Sacco, R., Walker, A., Baldini, W., Dalpiaz, P., Frabetti, P. L., Gianoli, A., Martini, M., Petrucci, F., Scarpa, M., Savrie, M., Bizzeti, A., Calvetti, M., Collazuol, G., Iacopini, E., Lenti, M., Ruggiero, G., Veltri, M., Behler, M., Eppard, K., Eppard, M., Hirstius, A., Kleinknecht, K., Koch, U., Masetti, L., Marouelli, P., Moosbrugger, U., Morales, C. Morales, Peters, A., Wanke, R., Winhart, A., Dabrowski, A., Martin, T. Fonseca, Velasco, M., Anzivino, G., Cenci, P., Imbergamo, E., Lamanna, G., Lubrano, P., Michetti, A., Nappi, A., Pepe, M., Petrucci, M. C., Piccini, M., Valdata, M., Cerri, C., Costantini, F., Fantechi, R., Fiorini, L., Giudici, S., Mannelli, I., Pierazzini, G., Sozzi, M., Cheshkov, C., Cheze, J. B., De Beer, M., Debu, P., Gouge, G., Marel, G., Mazzucato, E., Peyaud, B., Vallage, B., Holder, M., Maier, A., Ziolkowski, M., Bifani, S., Biino, C., Cartiglia, N., Clemencic, M., Lopez, S. Goy, Menichetti, E., Pastrone, N., Wislicki, W., Dibon, H., Jeitler, M., Markytan, M., Neuhofer, G., and Widhalm, L.

Subjects
High Energy Physics - Experiment
Abstract

From the 2002 data taking with a neutral kaon beam extracted from the CERN-SPS, the NA48/1 experiment observed 97 $\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$ candidates with a background contamination of $30.8 \pm 4.2$ events. From this sample, the BR($\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$) is measured to be $(2.17 \pm 0.32_{\mathrm{stat}}\pm 0.17_{\mathrm{syst}})\times10^{-6}$.

Published
2012
Full Text
View/download PDF

8. Search for the Rare Decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-

Author

KTeV Collaboration, Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kotera, K., Ledovskoy, A., McBride, P. L., Monnier, E., Nguyen, H., Niclasen, R., Phillips II, D. G., Ping, H., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Velissaris, C., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M. J., Winston, R., Worcester, E. T., Worcester, M., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

The KTeV E799 experiment has conducted a search for the rare decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-, where the X0 is a possible new neutral boson that was reported by the HyperCP experiment with a mass of (214.3 pm 0.5) MeV/c^{2}. We find no evidence for either decay. We obtain upper limits of Br(KL->pi0pi0X0->pi0pi0mu+mu-) < 1.0 x 10^{-10} and Br(KL->pi0pi0mu+mu-) < 9.2 x 10^{-11} at the 90% confidence level. This result rules out the pseudoscalar X0 as an explanation of the HyperCP result under the scenario that the \bar{d}sX0 coupling is completely real.

Published
2011
Full Text
View/download PDF

9. Precise Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System

Author

KTeV Collaboration, Abouzaid, E., Arenton, M., Barker, A. R., Barrio, M., Bellantoni, L., Blucher, E., Bock, G. J., Bown, C., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Graham, J., Hamm, J., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kotera, K., LaDue, J., Ledovskoy, A., McBride, P. L., Monnier, E., Nguyen, H., Niclasen, R., Phillips II, D. G., Prasad, V., Qi, X. R., Ramberg, E. J., Ray, R. E., Ronquest, M., Roodman, A., Santos, E., Shanahan, P., Shawhan, P. S., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Taegar, S. A., Toale, P. A., Tschirhart, R., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M. J., Winstein, B., Winston, R., Worcester, E. T., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

We present precise tests of CP and CPT symmetry based on the full dataset of K to pipi decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This dataset contains 16 million K to 2pi0 and 69 million K to pi+pi- decays. We measure the direct CP violation parameter Re(epsilon'/epsilon) = (19.2 pm 2.1)x10-4. We find the KL-KS mass difference Deltam = (5270 pm 12)x10^6 hbar/s and the KS lifetime tauS = (89.62 pm 0.05)x10-12 s. We also measure several parameters that test CPT invariance. We find the difference between the phase of the indirect CP violation parameter, epsilon, and the superweak phase, phi_epsilon - phi_SW = (0.40 pm 0.56) degrees. We measure the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K to pi+pi- (phi+-) and for K to 2pi0 (phi00), Delta phi = (0.30 pm 0.35) degrees. From these phase measurements, we place a limit on the mass difference between K0 and K0bar, DeltaM < 4.8 x 10-19 GeV/c^2 at 95% C.L. These results are consistent with those of other experiments, our own earlier measurements, and CPT symmetry., Comment: 28 pages, 30 figures; removed extra figure

Published
2010
Full Text
View/download PDF

10. Forward Neutron Production at the Fermilab Main Injector

Author

Nigmanov, T. S., Rajaram, D., Longo, M. J., Akgun, U., Aydin, G., Baker, W., Barnes, Jr., P. D., Bergfeld, T., Bujak, A., Carey, D., Dukes, E. C., Duru, F., Feldman, G. J., Godley, A., Gülmez, E., Günaydin, Y. O., Graf, N., Gustafson, H. R., Gutay, L., Hartouni, E., Hanlet, P., Heffner, M., Johnstone, C., Kaplan, D. M., Kamaev, O., Klay, J., Kostin, M., Lange, D., Lebedev, A., Lu, L. C., Materniak, C., Messier, M. D., Meyer, H., Miller, D. E., Mishra, S. R., Nelson, K. S., Norman, A., Onel, Y., Paley, J. M., Park, H. K., Penzo, A., Peterson, R. J., Raja, R., Rosenfeld, C., Rubin, H. A., Seun, S., Solomey, N., Soltz, R., Swallow, E., Torun, Y., Wilson, K., Wright, D., and Wu, K.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

We have measured cross sections for forward neutron production from a variety of targets using proton beams from the Fermilab Main Injector. Measurements were performed for proton beam momenta of 58 GeV/c, 84 GeV/c, and 120 GeV/c. The cross section dependence on the atomic weight (A) of the targets was found to vary as $A^(alpha)$ where $\alpha$ is $0.46\pm0.06$ for a beam momentum of 58 GeV/c and 0.54$\pm$0.05 for 120 GeV/c. The cross sections show reasonable agreement with FLUKA and DPMJET Monte Carlos. Comparisons have also been made with the LAQGSM Monte Carlo., Comment: Accepted for publication in Physical Review D. This version incorporates small changes suggested by referee and small corrections in the neutron production cross sections predicted by FLUKA

Published
2010
Full Text
View/download PDF

11. Empirical parameterization of the K+- -> pi+- pi0 pi0 decay Dalitz plot

Author

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., Peters, 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, Yu., Stoynev, S., Zinchenko, A., Monnier, E., Swallow, E., Winston, R., Rubin, P., Walker, A., Baldini, W., Ramusino, A. Cotta, Dalpiaz, P., Damiani, C., Fiorini, M., Gianoli, A., Martini, M., Petrucci, F., Savrié, M., Scarpa, M., Wahl, H., Calvetti, M., Iacopini, E., Ruggiero, G., Bizzeti, A., Lenti, M., Veltri, M., Behler, M., Eppard, K., Kleinknecht, K., Marouelli, P., Masetti, L., Moosbrugger, U., Morales, C. Morales, Renk, B., Wache, M., Wanke, R., Winhart, A., Coward, D., Dabrowski, A., Martin, T. Fonseca, Shieh, M., Szleper, M., Velasco, M., Wood, M. D., Anzivino, G., Imbergamo, E., Nappi, A., Piccini, M., Raggi, M., Valdata-Nappi, M., Cenci, P., Pepe, M., Petrucci, M. C., 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., Biino, C., Cartiglia, N., Marchetto, F., Bifani, S., Clemencic, M., Lopez, S. Goy, Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., and Widhalm, L.

Subjects
High Energy Physics - Experiment
Abstract

As first observed by the NA48/2 experiment at the CERN SPS, the $\p0p0$ invariant mass (M00) distribution from $\kcnn$ decay shows a cusp-like anomaly at M00=2m+, where m+ is the charged pion mass. An analysis to extract the pi pi scattering lengths in the isospin I=0 and I=2 states, a0 and a2, respectively, has been recently reported. In the present work the Dalitz plot of this decay is fitted to a new empirical parameterization suitable for practical purposes, such as Monte Carlo simulations of K+- -> pi+- pi0 pi0 decays., Comment: 9 pages, 3 figures.

Published
2010
Full Text
View/download PDF

12. Charged Kaon Mass Measurement using the Cherenkov Effect

Author

The MIPP Collaboration, Graf, N., Lebedev, A., Abrams, R. J., Akgun, U., Aydin, G., Baker, W., Barnes Jr., P. D., Bergfeld, T., Beverly, L., Bujak, A., Carey, D., Dukes, C., Duru, F., Feldman, G. J., Godley, A., Gülmez, E., Günaydın, Y. O., Gustafson, H. R., Gutay, L., Hartouni, E., Hanlet, P., Hansen, S., Heffner, M., Johnstone, C., Kaplan, D., Kamaev, O., Kilmer, J., Klay, J., Kostin, M., Lange, D., Ling, J., Longo, M. J., Lu, L. C., Materniak, C., Messier, M. D., Meyer, H., Miller, D. E., Mishra, S. R., Nelson, K., Nigmanov, T., Norman, A., Onel, Y., Paley, J. M., Park, H. K., Penzo, A., Peterson, R. J., Raja, R., Rajaram, D., Ratnikov, D., Rosenfeld, C., Rubin, H., Seun, S., Solomey, N., Soltz, R., Swallow, E., Schmitt, R., Subbarao, P., Torun, Y., Tope, T. E., Wilson, K., Wright, D., and Wu, K.

Subjects
High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

The two most recent and precise measurements of the charged kaon mass use X-rays from kaonic atoms and report uncertainties of 14 ppm and 22 ppm yet differ from each other by 122 ppm. We describe the possibility of an independent mass measurement using the measurement of Cherenkov light from a narrow-band beam of kaons, pions, and protons. This technique was demonstrated using data taken opportunistically by the Main Injector Particle Production experiment at Fermi National Accelerator Laboratory which recorded beams of protons, kaons, and pions ranging in momentum from +37 GeV/c to +63 GeV/c. The measured value is 491.3 +/- 1.7 MeV/c^2, which is within 1.4 sigma of the world average. An improvement of two orders of magnitude in precision would make this technique useful for resolving the ambiguity in the X-ray data and may be achievable in a dedicated experiment., Comment: 6 pages, 7 figures. Submitted to Nuclear Instruments and Methods A

Published
2009
Full Text
View/download PDF

13. Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma

Author

KTeV Collaboration, Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kotera, K., Ledovskoy, A., McBride, P. L., Monnier, E., Nguyen, H., Niclasen, R., Phillips II, D. G., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M. J., Winstein, B., Winston, R., Worcester, E. T., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

We report on a new measurement of the branching ratio B(KL->pi0 gamma gamma)using the KTeV detector. We reconstruct 1982 events with an estimated background of 608, that results in B(KL -> pi0 gamma gamma) = (1.29 +/- 0.03(stat) +/- 0.05(syst)) x 10**-6. We also measure the parameter, aV, which characterizes the strength of vector meson exchange terms in this decay. We find aV = -0.31 +/- 0.05(stat) +/- 0.07(syst). These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and aV., Comment: 8 pages, 8 figures

Published
2008
Full Text
View/download PDF

14. Determination of the Parity of the Neutral Pion via the Four-Electron Decay

Author

Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kotera, K., Ledovskoy, A., McBride, P. L., Monnier, E., Nguyen, H., Niclasen, R., Phillips II, D. G., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M. J., Winstein, B., Winston, R., Worcester, E. T., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

We present a new determination of the parity of the neutral pion via the double Dalitz decay pi^0 -> e+ e- e+ e-. Our sample, which consists of 30511 candidate decays, was collected from K_L -> pi0 pi0 pi0 decays in flight at the KTeV-E799 experiment at Fermi National Accelerator Laboratory. We confirm the negative pi^0 parity, and place a limit on scalar contributions to the pi^0 -> e+ e- e+ e- decay amplitude of less than 3.3% assuming CPT conservation. The pi^0 gamma* gamma* form factor is well described by a momentum-dependent model with a slope parameter fit to the final state phase space distribution. Additionally, we have measured the branching ratio of this mode to be B(pi^0 -> e+ e- e+ e-) = (3.26 +- 0.18) x 10^(-5)., Comment: 5 pages, 4 figures. Typographical error in radiative branching ratio (Eq. 6) corrected

Published
2008
Full Text
View/download PDF

15. Search for the Rare Decay K_{L}\to\pi^{0}\pi^{0}\gamma

Author

KTeV Collaboration, Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Corti, G., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kotera, K., Ledovskoy, A., McBride, P. L., Monnier, E., Nguyen, H., Niclasen, R., Phillips II, D. G., Ping, H., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Shields, J., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Velissaris, C., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M., Winston, R., Worcester, E. T., Worcester, M., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

The KTeV E799 experiment has conducted a search for the rare decay $K_{L}\to\pi^{0}\pi^{0}\gamma$ via the topology $K_{L}\to\pi^{0}\pi^{0}_D\gamma$ (where $\pi^0_D\to\gamma e^+e^-$). Due to Bose statistics of the $\pi^0$ pair and the real nature of the photon, the $K_{L}\to\pi^{0}\pi^{0}\gamma$ decay is restricted to proceed at lowest order by the CP conserving direct emission (DE) of an E2 electric quadrupole photon. The rate of this decay is interesting theoretically since chiral perturbation theory predicts that this process vanishes at level $O(p^4)$. Therefore, this mode probes chiral perturbation theory at $O(p^6)$. In this paper we report a determination of an upper limit of $2.43\times 10^{-7}$ (90% CL) for $K_{L}\to\pi^{0}\pi^{0}\gamma$. This is approximately a factor of 20 lower than previous results., Comment: six pages and six figures in the submission. Reformatted for Physics Review D

Published
2007
Full Text
View/download PDF

16. Measurement of the Decay KL -> pi0 e+ e- gamma

Author

KTeV Collaboration, Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kim, Y. J., Kotera, K., Ledovskoy, A., McBride, P. L., Monnier, E., Nelson, K. S., Nguyen, H., Niclasen, R., Phillips II, D. G., Ping, H., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Velissaris, C., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M. J., Winston, R., Worcester, E. T., Worcester, M., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

We report on a new measurement of the branching ratio B(KL -> pi0 e+ e- gamma) using the KTeV detector. This analysis uses the full KTeV data set collected from 1997 to 2000. We reconstruct 139 events over a background of 14, which results in B(KL -> pi0 e+ e- gamma) = (1.62 +/- 0.14 (stat) +/- 0.09 (syst)) x 10^{-8}. This result supersedes the earlier KTeV measurement of this branching ratio., Comment: 6 pages, 7 figures, Submitted to Phys. Rev. D

Published
2007
Full Text
View/download PDF

17. Observation of the Decay Xi^0 --> Sigma^+ mu^- nu(bar)

Author

KTeV Collaboration, Abouzaid, E., Alexopoulos, T., Arenton, M., Barbosa, R. F., Barker, A. R., Bellantoni, L., Bellavance, A., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Escobar, C. O., Glazov, A., Golossanov, A., Gomes, R. A., Gouffon, P., Hanagaki, K., Hsiung, Y. B., Huang, H., Jensen, D. A., Kessler, R., Kotera, K., LaDue, J., Ledovskoy, A., McBride, P. L., Monnier, E., Nelson, K. S., Nguyen, H., Niclasen, R., Ping, H., Prasad, V., Qi, X. R., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Shields, J., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Velissaris, C., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M., Winstein, B., Winston, R., Worcester, E. T., Worcester, M., Yamanaka, T., Zimmerman, E. D., and Zukanovich, R. F.

Subjects
High Energy Physics - Experiment
Abstract

The Xi^0 muon semi-leptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the Xi^0 beta decay mode and yields a value for the ratio of decay rates of $(1.8^{+0.7}_{-0.5}(stat.)\pm0.2(syst.))\times 10^{-2}$. This is in agreement with the SU(3) flavor symmetric quark model., Comment: 4 pages, 4 figures; changed authors list, figure added

Published
2005
Full Text
View/download PDF

18. Measurements of the Branching Fractions and Decay Distributions for KL->\pi\mu\nu\gamma and KL->\pi e\nu\gamma

Author

Alexopoulos, T., Andre, T., Arenton, M., Barbosa, R. F., Barker, A. R., Bellantoni, L., Bellavance, A., Blucher, E., Bock, G. J., Cheu, E., Childress, S., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Ford, R., Glazov, A., Golossanov, A., Graham, J., Hamm, J., Hanagaki, K., Hsiung, Y. B., Huang, H., Jejer, V., Jensen, D. A., Kessler, R., Kobrak, H. G. E., Kotera, K., LaDue, J., Ledovskoy, A., McBride, P. L., Monnier, E., Nelson, K. S., Nguyen, H., Niclasen, R., Prasad, V., Qi, X. R., Ramberg, E. J., Ray, R. E., Ronquest, M., Santos, E., Shanahan, P., Shields, J., Slater, W., Smith, D., Solomey, N., Swallow, E. C., Toale, P. A., Tschirhart, R., Wah, Y. W., Wang, J., White, H. B., Whitmore, J., Wilking, M., Winstein, B., Winston, R., Worcester, E. T., Yamanaka, T., and Zimmerman, E. D.

Subjects
High Energy Physics - Experiment
Abstract

We present measurements of R_Kl3rad = Gamma(KL->\pi\ell\nu\gamma; Egcm > 10 MeV)/Gamma(KL->\pi\ell\nu), where ell = mu or e, and Egcm is the photon energy in the kaon rest frame. These measurements are based on KL decays collected in 1997 by the KTeV (E832) experiment at Fermilab. With samples of 1385 KL->\pi\mu\nu\gamma and 14221 KL->\pi\e\nu\gamma candidates, we find R_Km3rad = (0.530 +- 0.019)% and R_Ke3rad = (4.942 +- 0.062)%. We also examine distributions of photon energy and lepton-photon angle., Comment: Submitted to Phys. Rev. D

Published
2004
Full Text
View/download PDF

19. Effective Hamiltonian Approach to Hyperon Beta Decay with Final-State Baryon Polarization

Author

Bright, S., Winston, R., Swallow, E. C., and Alavi-Harati, A.

Subjects
High Energy Physics - Phenomenology
Abstract

Using an effective Hamiltonian approach, we obtain expressions for hyperon beta decay final-state baryon polarization. Terms through second order in the energy release are retained. The resulting approximate expressions are much simpler and more compact than the exact expressions, and they agree closely with them., Comment: 1 Figure Will appear in Phys Rev D 60 Article 117505 (Dec 1, 1999)

Published
1999
Full Text
View/download PDF

22. Precision tests of the Standard Model with Kaon decays at CERN

Author

Ambrosino, F., Antonelli, A., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J.R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch-Devaux, B., Bocquet, G., Bolotov, V., Bucci, F., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Cenci, P., Cerri, C., Cheshkov, C., Chèze, J.B., Clemencic, M., Collazuol, G., Costantini, F., Cotta Ramusino, A., Coward, D., Cundy, D., Dabrowski, A., D'Agostini, G., Dalpiaz, P., Damiani, C., Danielsson, H., De Beer, M., Dellacasa, G., Derré, J., Dibon, H., Di Filippo, D., DiLella, L., Doble, N., Duk, V., Engelfried, J., Eppard, K., Falaleev, V., Fantechi, R., Fidecaro, M., Fiorini, L., Fiorini, M., Fonseca Martin, T., Frabetti, P.L., Fucci, A., Gallorini, S., Gatignon, L., Gersabeck, E., Gianoli, A., Giudici, S., Gonidec, A., Goudzovski, E., Goy Lopez, S., Gushchin, E., Hallgren, B., Hita-Hochgesand, M., Holder, M., Hristov, P., Iacopini, E., Imbergamo, E., Jeitler, M., Kalmus, G., Kekelidze, V., Kleinknecht, K., Kozhuharov, V., Kubischta, W., Kurshetsov, V., Lamanna, G., Lazzeroni, C., Lenti, M., Leonardi, E., Litov, L., Madigozhin, D., Maier, A., Mannelli, I., Marchetto, F., Marel, G., Markytan, M., Marouelli, P., Martini, M., Masetti, L., Massarotti, P., Mazzucato, E., Michetti, A., Mikulec, I., Misheva, M., Molokanova, N., Monnier, E., Moosbrugger, U., Morales Morales, C., Moulson, M., Movchan, S., Munday, D.J., Napolitano, M., Nappi, A., Neuhofer, G., Norton, A., Numao, T., Obraztsov, V., Palladino, V., Patel, M., Pepe, M., Peters, A., Petrucci, F., Petrucci, M.C., Peyaud, B., Piandani, R., Piccini, M., Pierazzini, G., Polenkevich, I., Popov, I., Potrebenikov, Yu., Raggi, M., Renk, B., Retière, F., Riedler, P., Romano, A., Rubin, P., Ruggiero, G., Salamon, A., Saracino, G., Savrié, M., Scarpa, M., Semenov, V., Sergi, A., Serra, M., Shieh, M., Shkarovskiy, S., Slater, M.W., Sozzi, M., Spadaro, T., Stoynev, S., Swallow, E., Szleper, M., Valdata-Nappi, M., Valente, P., Vallage, B., Velasco, M., Veltri, M., Venditti, S., Wache, M., Wahl, H., Walker, A., Wanke, R., Widhalm, L., Winhart, A., Winston, R., Wood, M.D., Wotton, S.A., Yushchenko, O., Zinchenko, A., and Ziolkowski, M.

Published
2016
Full Text
View/download PDF

23. Measurement of the form factors of charged kaon semileptonic decays

Author

The NA48/2 collaboration, Batley, J. R., 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., Maier, A., Norton, A., Patel, M., Peters, A., Balev, S., Frabetti, P. L., Gersabeck, E., Goudzovski, E., Hristov, P., Kekelidze, V., Kozhuharov, V., Litov, L., Madigozhin, D., Molokanova, N., Polenkevich, I., Potrebenikov, Yu., Shkarovskiy, S., Stoynev, S., Zinchenko, A., Monnier, E., Swallow, E., Winston, R., Rubin, P., Walker, A., Dalpiaz, P., Damiani, C., Fiorini, M., Martini, M., Petrucci, F., Savrié, M., Scarpa, M., Wahl, H., Baldini, W., Cotta Ramusino, A., Gianoli, A., Calvetti, M., Celeghini, E., Iacopini, E., Lenti, M., Ruggiero, G., Bizzeti, A., Veltri, M., Behler, M., Eppard, K., Hita-Hochgesand, M., 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, M. D., Anzivino, G., Imbergamo, E., Nappi, A., Piccini, M., Raggi, M., Valdata-Nappi, M., Cenci, P., Pepe, M., Petrucci, M. C., Costantini, F., Doble, N., Fiorini, L., Giudici, S., Pierazzini, G., Sozzi, M., Venditti, S., Collazuol, G., DiLella, L., Lamanna, G., Mannelli, I., Michetti, A., Cerri, C., Fantechi, R., 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., Clemencic, M., Goy Lopez, S., Biino, C., Cartiglia, N., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., and Widhalm, L.

Published
2018
Full Text
View/download PDF

33. Charged kaon mass measurement using the Cherenkov effect

Author

Graf, N., Lebedev, A., Abrams, R.J., Akgun, U., Aydin, G., Baker, W., Barnes, P.D., Jr., Bergfeld, T., Beverly, L., Bujak, A., Carey, D., Dukes, C., Duru, F., Feldman, G.J., Godley, A., Gülmez, E., Günaydın, Y.O., Gustafson, H.R., Gutay, L., Hartouni, E., Hanlet, P., Hansen, S., Heffner, M., Johnstone, C., Kaplan, D., Kamaev, O., Kilmer, J., Klay, J., Kostin, M., Lange, D., Ling, J., Longo, M.J., Lu, L.C., Materniak, C., Messier, M.D., Meyer, H., Miller, D.E., Mishra, S.R., Nelson, K., Nigmanov, T., Norman, A., Onel, Y., Paley, J.M., Park, H.K., Penzo, A., Peterson, R.J., Raja, R., Rajaram, D., Ratnikov, D., Rosenfeld, C., Rubin, H., Seun, S., Solomey, N., Soltz, R., Swallow, E., Schmitt, R., Subbarao, P., Torun, Y., Tope, T.E., Wilson, K., Wright, D., and Wu, K.

Published
2010
Full Text
View/download PDF

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

Author

Batley, J. R., Kalmus, G., Lazzeroni, C., Munday, D. J., Slater, M. W., Wotton, S. A., Arcidiacono, R., Bocquet, G., Cabibbo, N., Ceccucci, A., Cundy, D., Bloch-Devaux, B., Cheshkov, C., Cheze, J. B., De Beer, M., Derre, J., Marel, G., Mazzucato, E., Peyaud, B., Vallage, B., Holder, M., Falaleev, V., Ziolkowski, M., Bifani, S., Clemencic, M., Lopez, S. Goy, Biino, C., Cartiglia, N., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Fidecaro, M., Mikulec, I., Neuhofer, G., Widhalm, L., NA48/2 Collaboration, Gatignon, L., Gonidec, A., Kubischta, W., Maier, A., Norton, A., Patel, M., Peters, A., Balev, S., Frabetti, P. L., Gersabeck, E., Goudzovski, E., Hristov, P., Kekelidze, V., Kozhuharov, V., Litov, L., Madigozhin, D., Misheva, M., Molokanova, N., Polenkevich, I., Potrebenikov, Yu., Stoynev, S., Zinchenko, A., Monnier, E., Swallow, E., Winston, R., Rubin, P., Walker, A., Dalpiaz, P., Damiani, C., Fiorini, M., Martini, M., Petrucci, F., Savrie, M., Scarpa, M., Wahl, H., Baldini, W., Ramusino, A. Cotta, Gianoli, A., Calvetti, M., Celeghini, E., Iacopini, E., Lenti, M., Ruggiero, G., Bizzeti, A., Veltri, M., Behler, M., Eppard, K., Hita-Hochgesand, M., Kleinknecht, K., Marouelli, P., Masetti, L., Moosbrugger, U., MoralesMorales, C., Renk, B., Wache, M., Wanke, R., Winhart, A., Coward, D., Dabrowski, A., Fonseca Martin, T., Shieh, M., Szleper, M., Velasco, M., Wood, M. D., Anzivino, G., Imbergamo, E., Nappi, A., Piccini, M., Raggi, M., Valdata-Nappi, M., Cenci, P., Pepe, M., Petrucci, M. C., Costantini, F., Doble, N., Fiorini, L., Giudici, S., Pierazzini, G., Sozzi, M., Venditti, S., Collazuol, G., DiLella, L., Lamanna, G., Mannelli, I., Michetti, A., Cerri, C., and Fantechi, R.

Subjects
rare decay, Nuclear and High Energy Physics, Chiral perturbation theory, CP violation, Monte-Carlo, search, Astronomy & Astrophysics, Space (mathematics), quark mixing, 01 natural sciences, Partícules (Física nuclear), Charged Kaon decays, Physics, Particles & Fields, Charged Kaon decays, quark mixing, radiative kaon decay, chiral perturbation theory, Economica, 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics, Violació CP (Física nuclear), MONTE-CARLO, SEARCH, 0103 physical sciences, Kaon decays, radiative kaon decay, 010306 general physics, Physics, Science & Technology, 010308 nuclear & particles physics, Branching fraction, Kaon decays, Chiral Perturbation Theory, Ambientale, K meson, Nuclear & Particles Physics, Chiral Perturbation Theory, lcsh:QC1-999, fixed target experiment, Physics, Nuclear, Physical Sciences, K meson, rare decay, fixed target experiment, High Energy Physics::Experiment, CP VIOLATION, Atomic physics, lcsh:Physics
Abstract

The NA48/2 experiment at CERN reports the first observation of the K-+/- -> pi(+/-)pi(0)e(+)e(-) decay from an exposure of 1.7 x 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-+/- -> pi(+/-)pi(0)e(+)e(-)) = (4.24 +/- 0.14) x 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., We gratefully acknowledge the CERN SPS accelerator and beam line staff for the excellent performance of the beam and the technical staff of the participating institutes for their efforts in the maintenance and operation of the detector, and data processing. We thank M. Koval for making the “Prague” radiative Dalitz decay code available in the NA48/2 simulation software. Discussions with G. D'Ambrosio and O. Catà were most stimulating in clarifying the impact of interference terms on our measurement.

Published
2019

35. Latest results on rare kaon decays from the NA48/2 experiment at CERN

Author

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

Subjects
rare kaon decays
Published
2021

41. Precise tests of low energy QCD from $\mbox {$\mathrm {K}_{\mathrm {e}4}$}$ decay properties

Author

Batley, J. R., 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., Peters, 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, Yu., 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., Lenti, M., Veltri, M., Calvetti, M., Celeghini, E., Iacopini, E., Ruggiero, G., 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, M. D., Cenci, P., Pepe, M., Petrucci, M. C., Anzivino, G., Imbergamo, E., Nappi, A., 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., Biino, C., Cartiglia, N., Marchetto, F., Bifani, S., Clemencic, M., Goy Lopez, S., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., Widhalm, L., and The NA48/2 Collaboration

Published
2010
Full Text
View/download PDF

42. Measurement of the direct emission and interference terms and search for CP violation in the decay K ±→π ± π 0 γ

Author

Batley, J. R., 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., Peters, 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., Cotta Ramusino, A., Dalpiaz, P., Damiani, C., Fiorini, M., Gianoli, A., Martini, M., Petrucci, F., Savrié, M., Scarpa, M., Wahl, H., Bizzeti, A., Lenti, M., Veltri, M., Calvetti, M., Celeghini, E., Iacopini, E., Ruggiero, G., 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, M. D., Cenci, P., Petrucci, M. C., Pepe, M., Anzivino, G., Imbergamo, E., Nappi, A., 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., Goy Lopez, S., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., Widhalm, L., and The NA48/2 Collaboration

Published
2010
Full Text
View/download PDF

43. Determination of the S-wave π π scattering lengths from a study of K ±→π ± π 0 π 0 decays

Author

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., Peters, 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, Yu., 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., Calvetti, M., Iacopini, E., Ruggiero, G., Bizzeti, A., Lenti, M., 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, M. D., Anzivino, G., Imbergamo, E., Nappi, A., Piccini, M., Raggi, M., Valdata-Nappi, M., Cenci, P., Pepe, M., Petrucci, M. C., 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., Biino, C., Cartiglia, N., Marchetto, F., Bifani, S., Clemencic, M., Goy Lopez, S., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., and Widhalm, L.

Published
2009
Full Text
View/download PDF

44. New high statistics measurement of Ke4 decay form factors and ππ scattering phase shifts

Author

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., Peters, 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., 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, M.D., Anzivino, G., Cenci, P., Imbergamo, E., Nappi, A., Pepe, M., Petrucci, M.C., 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, 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., Goy Lopez, S., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., Widhalm, L., and The NA48/2 Collaboration

Published
2008
Full Text
View/download PDF

45. Search for direct CP violating charge asymmetries in K±→π±π+π- and K±→π±π0π0 decays

Author

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., Peters, 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., 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, M.D., Anzivino, G., Cenci, P., Imbergamo, E., Nappi, A., Pepe, M., Petrucci, M.C., 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, 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., Goy Lopez, S., Marchetto, F., Dibon, H., Jeitler, M., Markytan, M., Mikulec, I., Neuhofer, G., Widhalm, L., and The NA48/2 Collaboration

Published
2007
Full Text
View/download PDF

46. Measurements of charged kaon semileptonic decay branching fractions K±→π0μ±ν and K±→π0e±ν and their ratio

Author

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., Frabetti, P.L., Goudzovski, E., Hristov, P., 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, M.D., Anzivino, G., Cenci, P., Imbergamo, E., Pepe, M., Petrucci, M.C., 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, J.B., 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., and The NA48/2 Collaboration

Published
2007
Full Text
View/download PDF

47. Cost-effectiveness analysis of olaparib as a maintenance monotherapy for patients with newly diagnosed advanced ovarian cancer and a BRCA1/2 mutation: A United States payer perspective

Author

Muston, D.R.G., primary, Monberg, M.J., additional, McLaurin, K., additional, Sackeyfio, A., additional, Hettle, R., additional, Signorovitch, J., additional, Swallow, E., additional, Gao, W., additional, Zhang, S., additional, Kalemaj, I., additional, and Moore, K.N., additional

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results