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Chinese Physics C IOP Publishing 47:4 (2023) 043001-043001

Authors:

M Ablikim, MN Achasov, P Adlarson, M Albrecht, R Aliberti, A Amoroso, MR An, Q An, XH Bai, Y Bai, O Bakina, R Baldini Ferroli, I Balossino, Y Ban, V Batozskaya, D Becker, K Begzsuren, N Berger, M Bertani, D Bettoni, F Bianchi, J Bloms, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, JF Chang, WL Chang, G Chelkov, C Chen, Chao Chen, G Chen, HS Chen, ML Chen, SJ Chen, SM Chen, T Chen, XR Chen, XT Chen, YB Chen, ZJ Chen, WS Cheng, X Chu, G Cibinetto

Abstract:

Using data taken at 29 center-of-mass energies between 4.16 and 4.70 GeV with the BESIII detector at the Beijing Electron Positron Collider corresponding to a total integrated luminosity of approximately 18.8 $\rm fb^{-1}$, the process $e^+e^- \to p p \bar{p} \bar{n} \pi^{-} + c.c.$ is observed for the first time with a statistical significance of $11.5\sigma$. The average Born cross sections in the energy ranges of (4.160, 4.380) GeV, (4.400, 4.600) GeV and (4.610, 4.700) GeV are measured to be $(21.5\pm5.7\pm1.2)$ fb, $(46.3\pm10.6\pm2.5)$ fb and $(59.0\pm9.4\pm3.2)$ fb, respectively, where the first uncertainties are statistical and the second are systematic. The line shapes of the $\bar{p}\bar{n}$ and $pp\pi^-$ invariant mass spectra are consistent with phase space distributions, indicating that no hexaquark or di-baryon state is observed.Comment: 10 pages, 4 figures. Submitted to Chinese Physics
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A study of $C\!P$ violation in the decays $B^\pm\to[K^+K^-π^+π^-]_D h^{\pm}$ ($h = K, π$) and $B^\pm\to[π^+π^-π^+π^-]_D h^{\pm}$

ArXiv 2301.10328 (2023)
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Study of e+e− → γϕJ/ψ from $$ \sqrt{s} $$ = 4.600 to 4.951 GeV

Journal of High Energy Physics Springer 2023:1 (2023) 132

Authors:

M Ablikim, MN Achasov, P Adlarson, M Albrecht, R Aliberti, A Amoroso, MR An, Q An, Y Bai, O Bakina, R Baldini Ferroli, I Balossino, Y Ban, V Batozskaya, D Becker, K Begzsuren, N Berger, M Bertani, D Bettoni, F Bianchi, E Bianco, J Bloms, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, JF Chang, WL Chang, GR Che, G Chelkov, C Chen, Chao Chen, G Chen, HS Chen, ML Chen, SJ Chen, SM Chen, T Chen, XR Chen, XT Chen, YB Chen, ZJ Chen, WS Cheng, SK Choi

Abstract:

Using data samples with an integrated luminosity of 6.4 fb−1 collected by the BESIII detector operating at the BEPCII storage ring, the process of e+e− → γϕJ/ψ is studied. The processes of e+e− → ϕχc1,c2, χc1,c2 → γJ/ψ are observed with a significance of more than 10σ. The s-dependent cross section of e+e− → ϕχc1,c2 is measured between 4.600 and 4.951 GeV, and evidence of a resonance structure is found for the first time in the ϕχc2 process. We also search for the processes of e+e− → γX(4140), γX(4274) and γX(4500) via the γϕJ/ψ final state, but no obvious structures are found. The upper limits on the production cross section times the branching fraction for these processes at the 90% confidence level are reported. [Figure not available: see fulltext.]
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Measurement of e+e− → ωπ+π− cross section at $$ \sqrt{s} $$ = 2.000 to 3.080 GeV

Journal of High Energy Physics Springer 2023:1 (2023) 111

Authors:

M Ablikim, MN Achasov, P Adlarson, S Ahmed, M Albrecht, R Aliberti, A Amoroso, MR An, Q An, XH Bai, Y Bai, O Bakina, R Baldini Ferroli, I Balossino, Y Ban, V Batozskaya, D Becker, K Begzsuren, N Berger, M Bertani, D Bettoni, F Bianchi, J Bloms, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, JF Chang, WL Chang, G Chelkov, C Chen, G Chen, HS Chen, ML Chen, SJ Chen, T Chen, XR Chen, XT Chen, YB Chen, ZJ Chen, WS Cheng, G Cibinetto, F Cossio, JJ Cui

Abstract:

The original article was published in Jan. 2023 (JHEP 01 (2023) 111), which the value of (Formula presented.) μ = (2.213 ± 0.106 ± 0.149) × 10−10 is not correct. It should be a!(Formula presented.) μ = (0.135 ± 0.007 ± 0.009)×10−10. The other parts of the paper are correct other than the a!(Formula presented.) μ value to be modified. The corresponding preprint is arXiv:2208.04507v3
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Evidence of a $J/ψK_S^0$ structure in $B^0 \to J/ψφK_S^0$ decays

ArXiv 2301.04899 (2023)
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