Precise measurements of the eta and the neutral kaon meson masses with the KLOE detector
F. Ambrosino, A. Antonelli, M. Antonelli, F. Archilli, C. Bacci, P., Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, S. Bocchetta, F., Bossi, P. Branchini, R. Caloi, P. Campana, G. Capon, T. Capussela, F., Ceradini, S. Chi, G. Chiefari, P. Ciambrone, E. De Lucia
TL;DR
This paper reports highly precise measurements of the eta and neutral kaon meson masses using the KLOE detector, improving accuracy and comparing results with previous measurements.
Contribution
The study provides the most accurate eta meson mass measurement to date and offers a refined K0 mass measurement, enhancing the precision of meson mass values.
Findings
K0 mass measured as 497.583 +/- 0.005 (stat) +/- 0.020 (syst) MeV
eta mass measured as 547.874 +/- 0.007 (stat) +/- 0.031 (syst) MeV
Results agree with some recent measurements but differ significantly from others.
Abstract
We present precise measurements of the eta and K0 masses using the processes phi to eta gamma, eta to gamma gamma and phi to Ks Kl, Ks to pi+ pi-. The K0 mass measurement, M_K=497.583 +/- 0.005 (stat) +/- 0.020 (syst) MeV, is in acceptable agreement with the previous measurements but is more accurate. We find m(eta) = 547.874 +/- 0.007 (stat) +/- 0.031 (syst) MeV. Our value is the most accurate to date and is in agreement with two recent measurements based on eta decays, but is inconsistent, by about 10 sigma, with a measurement of comparable precision based on eta production at threshold.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.