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Main Authors: Babusci, D., Beltrame, P., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Cao, B., Ceradini, F., Ciambrone, P., Cotrozzi, L., Curciarello, F., Czerwiński, E., D'Agostini, G., D'Amico, R., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Domenico, A., Diociaiuti, E., Domenici, D., D'Uffizi, A., Fantini, G., Fiore, S., Gajos, A., Gamrat, S., Gauzzi, P., Giovannella, S., Graziani, E., Ignatov, F., Kang, X., Kupsc, A., Mandaglio, G., Martini, M., Miscetti, S., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Punzi, L., Sborzacchi, F., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Teubner, T., Venanzoni, G., Vestergaard, N., Wiślicki, W., Wolke, M., Zaid, E.
Format: Preprint
Published: 2025
Subjects:
High Energy Physics - Experiment
Online Access:https://arxiv.org/abs/2505.09285
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author Babusci, D.
Beltrame, P.
Berlowski, M.
Bloise, C.
Bossi, F.
Branchini, P.
Cao, B.
Ceradini, F.
Ciambrone, P.
Cotrozzi, L.
Curciarello, F.
Czerwiński, E.
D'Agostini, G.
D'Amico, R.
Danè, E.
De Leo, V.
De Lucia, E.
De Santis, A.
De Simone, P.
Di Domenico, A.
Diociaiuti, E.
Domenici, D.
D'Uffizi, A.
Fantini, G.
Fiore, S.
Gajos, A.
Gamrat, S.
Gauzzi, P.
Giovannella, S.
Graziani, E.
Ignatov, F.
Kang, X.
Kupsc, A.
Mandaglio, G.
Martini, M.
Miscetti, S.
Moskal, P.
Passeri, A.
Patera, V.
del Rio, E. Perez
Punzi, L.
Sborzacchi, F.
Schioppa, M.
Selce, A.
Silarski, M.
Sirghi, F.
Solodov, E. P.
Teubner, T.
Venanzoni, G.
Vestergaard, N.
Wiślicki, W.
Wolke, M.
Zaid, E.
author_facet Babusci, D.
Beltrame, P.
Berlowski, M.
Bloise, C.
Bossi, F.
Branchini, P.
Cao, B.
Ceradini, F.
Ciambrone, P.
Cotrozzi, L.
Curciarello, F.
Czerwiński, E.
D'Agostini, G.
D'Amico, R.
Danè, E.
De Leo, V.
De Lucia, E.
De Santis, A.
De Simone, P.
Di Domenico, A.
Diociaiuti, E.
Domenici, D.
D'Uffizi, A.
Fantini, G.
Fiore, S.
Gajos, A.
Gamrat, S.
Gauzzi, P.
Giovannella, S.
Graziani, E.
Ignatov, F.
Kang, X.
Kupsc, A.
Mandaglio, G.
Martini, M.
Miscetti, S.
Moskal, P.
Passeri, A.
Patera, V.
del Rio, E. Perez
Punzi, L.
Sborzacchi, F.
Schioppa, M.
Selce, A.
Silarski, M.
Sirghi, F.
Solodov, E. P.
Teubner, T.
Venanzoni, G.
Vestergaard, N.
Wiślicki, W.
Wolke, M.
Zaid, E.
contents We present a measurement of the radiative decay $η\toπ^0γγ$ using 82 million $η$ mesons produced in $e^+e^-\toϕ\toηγ$ process at the Frascati $ϕ$-factory DA$Φ$NE. From the data analysis $1246\pm133$ signal events are observed. By normalising the signal to the well-known $η\to3π^0$ decay the branching fraction ${\cal B}(η\toπ^0γγ)$ is measured to be $(0.98\pm 0.11_\text{stat}\pm 0.14_\text{syst})\times10^{-4}$. This result agrees with a preliminary KLOE measurement, but is twice smaller than the present world average. Results for $dΓ(η\toπ^0γγ)/dM^2(γγ)$ are also presented and compared with latest theory predictions.
format Preprint
id arxiv_https___arxiv_org_abs_2505_09285
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Measurement of $η\toπ^{0}γγ$ branching fraction with the KLOE detector
Babusci, D.
Beltrame, P.
Berlowski, M.
Bloise, C.
Bossi, F.
Branchini, P.
Cao, B.
Ceradini, F.
Ciambrone, P.
Cotrozzi, L.
Curciarello, F.
Czerwiński, E.
D'Agostini, G.
D'Amico, R.
Danè, E.
De Leo, V.
De Lucia, E.
De Santis, A.
De Simone, P.
Di Domenico, A.
Diociaiuti, E.
Domenici, D.
D'Uffizi, A.
Fantini, G.
Fiore, S.
Gajos, A.
Gamrat, S.
Gauzzi, P.
Giovannella, S.
Graziani, E.
Ignatov, F.
Kang, X.
Kupsc, A.
Mandaglio, G.
Martini, M.
Miscetti, S.
Moskal, P.
Passeri, A.
Patera, V.
del Rio, E. Perez
Punzi, L.
Sborzacchi, F.
Schioppa, M.
Selce, A.
Silarski, M.
Sirghi, F.
Solodov, E. P.
Teubner, T.
Venanzoni, G.
Vestergaard, N.
Wiślicki, W.
Wolke, M.
Zaid, E.
High Energy Physics - Experiment
We present a measurement of the radiative decay $η\toπ^0γγ$ using 82 million $η$ mesons produced in $e^+e^-\toϕ\toηγ$ process at the Frascati $ϕ$-factory DA$Φ$NE. From the data analysis $1246\pm133$ signal events are observed. By normalising the signal to the well-known $η\to3π^0$ decay the branching fraction ${\cal B}(η\toπ^0γγ)$ is measured to be $(0.98\pm 0.11_\text{stat}\pm 0.14_\text{syst})\times10^{-4}$. This result agrees with a preliminary KLOE measurement, but is twice smaller than the present world average. Results for $dΓ(η\toπ^0γγ)/dM^2(γγ)$ are also presented and compared with latest theory predictions.
title Measurement of $η\toπ^{0}γγ$ branching fraction with the KLOE detector
topic High Energy Physics - Experiment
url https://arxiv.org/abs/2505.09285

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