Natural Explanation of Recent Results on e+e- → λλ¯
- Authors: Mil'shteyn A.I1,2, Sal'nikov S.G1,2
-
Affiliations:
- Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
- Novosibirsk State University, 630090, Novosibirsk, Russia
- Issue: Vol 117, No 11-12 (6) (2023)
- Pages: 901-903
- Section: Articles
- URL: https://vestnik.nvsu.ru/0370-274X/article/view/663157
- DOI: https://doi.org/10.31857/S1234567823120054
- EDN: https://elibrary.ru/EVDXCG
- ID: 663157
Cite item
Abstract
We show that the recent experimental data on the cross section of the process e+e- ΛΛ¯ near the threshold can be perfectly explained by the final-state interaction of Λ and Λ¯. The enhancement of the cross section is related to the existence of low-energy real or virtual state in the corresponding potential. We present a simple analytical formula that fits the experimental data very well.
About the authors
A. I Mil'shteyn
Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia; Novosibirsk State University, 630090, Novosibirsk, Russia
Email: a.i.milstein@inp.nsk.su
S. G Sal'nikov
Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia; Novosibirsk State University, 630090, Novosibirsk, Russia
Author for correspondence.
Email: s.g.salnikov@inp.nsk.su
References
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. D 107, 072005 (2023).
- B. Aubert, M. Bona, D. Boutigny et al. (BABAR Collaboration), Phys. Rev. D 76, 092006 (2007).
- M. Ablikim, M. N. Achasov, S. Ahmed et al. (BESIII Collaboration), Phys. Rev. D 97, 032013 (2018).
- M. Ablikim, M. N. Achasov, P. Adlarson, M. Ablikim et al. (BESIII Collaboration), Phys. Rev. Lett. 123, 122003 (2019).
- B. Aubert, R. Barate, D. Boutigny et al. (BABAR Collaboration), Phys. Rev. D 73, 012005 (2006).
- J. P. Lees, V. Poireau, V. Tisserand et al. (BABAR Collaboration), Phys. Rev. D 87, 092005 (2013).
- R. R. Akhmetshin, A. N. Amirkhanov, A. V. Anisenkov et al. (CMD-3 Collaboration), Phys. Lett. B 759, 634 (2016).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. Lett. 124, 042001 (2020).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Lett. B 817, 136328 (2021).
- R. R. Akhmetshin, A. N. Amirkhanov, A. V. Anisenkov et al. (CMD-3 Collaboration), Phys. Lett. B 794, 64 (2019).
- M. Ablikim, M. N. Achasov, X. C. Ai et al. (BESIII Collaboration), Phys. Rev. D 91, 112004 (2015).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. D 99, 092002 (2019).
- M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov et al. (SND Collaboration), Phys. Rev. D 90, 112007 (2014).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Nat. Phys. 17, 1200 (2021).
- M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov et al. (SND Collaboration), Eur. Phys. J. C 82, 761 (2022).
- G. Pakhlova, I. Adachi, H. Aihara et al. (BELLE Collaboration), Phys. Rev. Lett. 101, 172001 (2008).
- M. Ablikim, M. N. Achasov, S. Ahmed et al. (BESIII Collaboration), Phys. Rev. Lett. 120, 132001 (2018).
- B. Aubert, M. Bona, Y. Karyotakis et al. (BABAR Collaboration), Phys. Rev. Lett. 102, 012001 (2009).
- J. Haidenbauer, X.-W. Kang, and U.-G. Meißner, Nucl. Phys. A 929, 102 (2014).
- J. Haidenbauer and U.-G. Meißner, Phys. Lett. B 761, 456 (2016).
- J. Haidenbauer, U.-G. Meißner, and L.-Y. Dai, Phys. Rev. D 103, 014028 (2021).
- A. I. Milstein and S. G. Salnikov, Phys. Rev. D 104, 014007 (2021).
- A. I. Milstein and S. G. Salnikov, Phys. Rev. D 105, 074002 (2022).
- A. I. Milstein and S. G. Salnikov, Phys. Rev. D 105, L031501 (2022).
- A. I. Milstein and S. G. Salnikov, Phys. Rev. D 106, 074012 (2022).
- L. D. Landau and E. M. Lifshitz, Quantum Mechanics - Non-relativistic Theory, Pergamon Press, Oxford (1991).
- S. M. Flatt'e, Phys. Lett. B 63, 224 (1976).
- B. Aubert, M. Bona, D. Boutigny et al. (BABAR Collaboration), Phys. Rev. D 76, 012008 (2007).
- Y.-W. Chang, M.-Z. Wang, I. Adachi et al. (BELLE Collaboration), Phys. Rev. D 79, 052006 (2009).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. D 100, 032009 (2019).
- M. Ablikim, M. N. Achasov, S. Ahmed et al. (BESIII Collaboration), Phys. Rev. D 99, 032001 (2019).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. Lett. 124, 112001 (2020).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. D 102, 012008 (2020).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), Phys. Rev. D 104, 032007 (2021).
- M. Ablikim, M. N. Achasov, P. Adlarson et al. (BESIII Collaboration), arXiv:2112.13219 [hep-ex].
- L. Xia, Supl. la Rev. Mex. F'ısica 3, 1 (2022).
Supplementary files
