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Upper limit on the η → π + π − branching fraction with the KLOE experiment. / The KLOE-2 Collaboration.

In: Journal of High Energy Physics, Vol. 2020, No. 10, 47, 01.10.2020.

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Harvard

The KLOE-2 Collaboration 2020, 'Upper limit on the η → π + π − branching fraction with the KLOE experiment', Journal of High Energy Physics, vol. 2020, no. 10, 47. https://doi.org/10.1007/JHEP10(2020)047

APA

The KLOE-2 Collaboration (2020). Upper limit on the η → π + π − branching fraction with the KLOE experiment. Journal of High Energy Physics, 2020(10), [47]. https://doi.org/10.1007/JHEP10(2020)047

Vancouver

The KLOE-2 Collaboration. Upper limit on the η → π + π − branching fraction with the KLOE experiment. Journal of High Energy Physics. 2020 Oct 1;2020(10):47. doi: 10.1007/JHEP10(2020)047

Author

The KLOE-2 Collaboration. / Upper limit on the η → π + π − branching fraction with the KLOE experiment. In: Journal of High Energy Physics. 2020 ; Vol. 2020, No. 10.

BibTeX

@article{ab724e4b1aca45adaf6ae831ed7c03e0,
title = "Upper limit on the η → π + π − branching fraction with the KLOE experiment",
abstract = "Based on an integrated luminosity of 1.61 fb−1e+e− collision data collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory, a search for the P- and CP-violating decay η → π+π− has been performed. Radiative ϕ → ηγ decay is exploited to access the η mesons. No signal is observed in the π+π− invariant mass spectrum, and the upper limit on the branching fraction at 90% confidence level is determined to be ℬ(η → π+π−) < 4.9 × 10−6, which is approximately three times smaller than the previous KLOE result. From the combination of these two measurements we get ℬ(η → π+π−) < 4.4 × 10−6 at 90% confidence level.",
keywords = "Branching fraction, CP violation, e-e Experiments, Rare decay, e(+)-e(-) Experiments, DETECTOR, SEARCHES, DECAYS, CP",
author = "{The KLOE-2 Collaboration} and D. Babusci and M. Berlowski and C. Bloise and F. Bossi and P. Branchini and A. Budano and B. Cao and F. Ceradini and P. Ciambrone and F. Curciarello and E. Czerwi{\'n}ski and G. D{\textquoteright}Agostini and E. Dan{\`e} and {De Leo}, V. and {De Lucia}, E. and {De Santis}, A. and {De Simone}, P. and {Di Cicco}, A. and {Di Domenico}, A. and D. Domenici and A. D{\textquoteright}Uffizi and A. Fantini and P. Fermani and S. Fiore and A. Gajos and P. Gauzzi and S. Giovannella and E. Graziani and Ivanov, {V. L.} and T. Johansson and X. Kang and D. Kisielewska-Kami{\'n}ska and Kozyrev, {E. A.} and W. Krzemien and A. Kupsc and Lukin, {P. A.} and G. Mandaglio and M. Martini and R. Messi and S. Miscetti and D. Moricciani and P. Moskal and S. Parzych and A. Passeri and V. Patera and {Perez del Rio}, E. and P. Santangelo and M. Schioppa and A. Selce and Solodov, {E. P.}",
year = "2020",
month = oct,
day = "1",
doi = "10.1007/JHEP10(2020)047",
language = "English",
volume = "2020",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer US",
number = "10",

}

RIS

TY - JOUR

T1 - Upper limit on the η → π + π − branching fraction with the KLOE experiment

AU - The KLOE-2 Collaboration

AU - Babusci, D.

AU - Berlowski, M.

AU - Bloise, C.

AU - Bossi, F.

AU - Branchini, P.

AU - Budano, A.

AU - Cao, B.

AU - Ceradini, F.

AU - Ciambrone, P.

AU - Curciarello, F.

AU - Czerwiński, E.

AU - D’Agostini, G.

AU - Danè, E.

AU - De Leo, V.

AU - De Lucia, E.

AU - De Santis, A.

AU - De Simone, P.

AU - Di Cicco, A.

AU - Di Domenico, A.

AU - Domenici, D.

AU - D’Uffizi, A.

AU - Fantini, A.

AU - Fermani, P.

AU - Fiore, S.

AU - Gajos, A.

AU - Gauzzi, P.

AU - Giovannella, S.

AU - Graziani, E.

AU - Ivanov, V. L.

AU - Johansson, T.

AU - Kang, X.

AU - Kisielewska-Kamińska, D.

AU - Kozyrev, E. A.

AU - Krzemien, W.

AU - Kupsc, A.

AU - Lukin, P. A.

AU - Mandaglio, G.

AU - Martini, M.

AU - Messi, R.

AU - Miscetti, S.

AU - Moricciani, D.

AU - Moskal, P.

AU - Parzych, S.

AU - Passeri, A.

AU - Patera, V.

AU - Perez del Rio, E.

AU - Santangelo, P.

AU - Schioppa, M.

AU - Selce, A.

AU - Solodov, E. P.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - Based on an integrated luminosity of 1.61 fb−1e+e− collision data collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory, a search for the P- and CP-violating decay η → π+π− has been performed. Radiative ϕ → ηγ decay is exploited to access the η mesons. No signal is observed in the π+π− invariant mass spectrum, and the upper limit on the branching fraction at 90% confidence level is determined to be ℬ(η → π+π−) < 4.9 × 10−6, which is approximately three times smaller than the previous KLOE result. From the combination of these two measurements we get ℬ(η → π+π−) < 4.4 × 10−6 at 90% confidence level.

AB - Based on an integrated luminosity of 1.61 fb−1e+e− collision data collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory, a search for the P- and CP-violating decay η → π+π− has been performed. Radiative ϕ → ηγ decay is exploited to access the η mesons. No signal is observed in the π+π− invariant mass spectrum, and the upper limit on the branching fraction at 90% confidence level is determined to be ℬ(η → π+π−) < 4.9 × 10−6, which is approximately three times smaller than the previous KLOE result. From the combination of these two measurements we get ℬ(η → π+π−) < 4.4 × 10−6 at 90% confidence level.

KW - Branching fraction

KW - CP violation

KW - e-e Experiments

KW - Rare decay

KW - e(+)-e(-) Experiments

KW - DETECTOR

KW - SEARCHES

KW - DECAYS

KW - CP

UR - http://www.scopus.com/inward/record.url?scp=85092531000&partnerID=8YFLogxK

U2 - 10.1007/JHEP10(2020)047

DO - 10.1007/JHEP10(2020)047

M3 - Article

AN - SCOPUS:85092531000

VL - 2020

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 10

M1 - 47

ER -

ID: 25613011