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Search for the process e+e-→ f1(1285) at the SND detector
Abstract
In the experiment with the SND detector at the VEPP-2000 e+e- collider, a search is performed for the direct production of the C-even f1(1285) resonance in e+e- collisions. The analysis is based on data with an integrated luminosity of about 200 pb−1, accumulated in the center-of-mass energy range of 1.14--1.46 GeV, of which about 72 pb−1 were recorded near the maximum of the f1(1285) resonance. The f1(1285) production cross section at the resonance maximum σ(e+e-→ f1)=(31± 13± 2) pb and the branching fraction B(f1(1285)→ e+e-)=(3.5± 1.4± 0.3)× 10−9 have been measured. The significance of the observation of the e+e-→ f1(1285) process is 2.5σ. Since the significance is low, we also present the upper limits at the 90% confidence level: σ(e+e-→ f1)<48 pb and B(f1(1285)→ e+e-)<5.4× 10−9.
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BibTeX
@misc{collaboration2026search,
title = {{Search for the process $e^+e^-\to f_1(1285)$ at the SND detector}},
author = {SND Collaboration and M. N. Achasov and A. E. Alizzi and A. Yu. Barnyakov and E. V. Bedarev and K. I. Beloborodov and A. V. Berdyugin and D. E. Berkaev and A. G. Bogdanchikov and A. A. Botov and D. E. Chistyakov and T. V. Dimova and V. P. Druzhinin and R. A. Efremov and L. V. Kardapoltsev and A. S. Kasaev and A. A. Kattsin and V. R. Khamidullin and A. G. Kharlamov and I. A. Koop and A. A. Korol and D. P. Kovrizhin and A. S. Kupich and A. P. Kryukov and A. R. Mamedov and N. A. Melnikova and N. Yu. Muchnoi and A. E. Obrazovsky and A. A. Oorzhak and I. V. Ovtin and E. V. Pakhtusova and I. A. Polomoshnov and K. V. Pugachev and S and A. Rastigeev and Yu. A. Rogovsky and V. A. Romanov and S. I. Serednyakov and D. A. Shtol and Z. K. Silagadze and K. D. Sungurov and I. K. Surin and Yu. V. Usov and V. N. Zhabin and V. V. Zhulanov},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.11057},
eprint = {2609.11057},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.11057},
}
RIS
TY - UNPB
TI - Search for the process e^+e^-→ f_1(1285) at the SND detector
AU - SND Collaboration
AU - M. N. Achasov
AU - A. E. Alizzi
AU - A. Yu. Barnyakov
AU - E. V. Bedarev
AU - K. I. Beloborodov
AU - A. V. Berdyugin
AU - D. E. Berkaev
AU - A. G. Bogdanchikov
AU - A. A. Botov
AU - D. E. Chistyakov
AU - T. V. Dimova
AU - V. P. Druzhinin
AU - R. A. Efremov
AU - L. V. Kardapoltsev
AU - A. S. Kasaev
AU - A. A. Kattsin
AU - V. R. Khamidullin
AU - A. G. Kharlamov
AU - I. A. Koop
AU - A. A. Korol
AU - D. P. Kovrizhin
AU - A. S. Kupich
AU - A. P. Kryukov
AU - A. R. Mamedov
AU - N. A. Melnikova
AU - N. Yu. Muchnoi
AU - A. E. Obrazovsky
AU - A. A. Oorzhak
AU - I. V. Ovtin
AU - E. V. Pakhtusova
AU - I. A. Polomoshnov
AU - K. V. Pugachev
AU - S
AU - A. Rastigeev
AU - Yu. A. Rogovsky
AU - V. A. Romanov
AU - S. I. Serednyakov
AU - D. A. Shtol
AU - Z. K. Silagadze
AU - K. D. Sungurov
AU - I. K. Surin
AU - Yu. V. Usov
AU - V. N. Zhabin
AU - V. V. Zhulanov
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.11057
UR - https://arxiv.org/abs/2609.11057
AB - In the experiment with the SND detector at the VEPP-2000 e^+e^- collider, a search is performed for the direct production of the C-even f_1(1285) resonance in e^+e^- collisions. The analysis is based on data with an integrated luminosity of about 200 pb^−1, accumulated in the center-of-mass energy range of 1.14--1.46 GeV, of which about 72 pb^−1 were recorded near the maximum of the f_1(1285) resonance. The f_1(1285) production cross section at the resonance maximum σ(e^+e^-→ f_1)=(31± 13± 2) pb and the branching fraction B(f_1(1285)→ e^+e^-)=(3.5± 1.4± 0.3)× 10^−9 have been measured. The significance of the observation of the e^+e^-→ f_1(1285) process is 2.5σ. Since the significance is low, we also present the upper limits at the 90% confidence level: σ(e^+e^-→ f_1)<48 pb and B(f_1(1285)→ e^+e^-)<5.4× 10^−9.
ER -