Observation of e~+e~-→D_s~+■~((*)0)K~- and study of the P-wave D_s mesons
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摘要
Studies of e~+e~→D_s~+■~((*)0)K~-and the P-wave charmed-strange mesons are performed based on an e~+e~-collision data sample corresponding to an integrated luminosity of 567 pb~(-1) collected with the BESIII detector at s~(1/2)=4.600 GeV. The processes of e~+e~-→D_s~+■~(*0)K~- and D_s~+■~0K~- are observed for the first time and are found to be dominated by the modes D_s~+D_(s1)(2536)~-and D_s~+D_(s2)~*(2573)~-, respectively. The Born cross sections are measured to be σ~B(e~+e~-→D_s~+■~(*0)K~-) =(10.1±2.3±0.8) pb and σ~B(e~+e~-→D_s~+■~0K~-) =(19.4±2.3± 1.6) pb, and the products of Born cross section and the decay branching fraction are measured to be σ~B(e~+e~-→D_s~+D_(s1)(2536)~-+c.c.)·B(D_(s1)(2536)~-→■~(*0)K~-)=(7.5±1.8±0.7) pb and σ~B(e~+e~-→D_s~+D_(s2)~*(2573)~-+ c.c.)·B(D_(s2)~*(2573)~-→■~0 K~-)=(19.7 ± 2.9 ±2.0) pb. For the D_(s1)(2536)~-and D_(s2)~*(2573)~-mesons, the masses and widths are measured to be M(D_(s1)(2536)~-)=(2537.7±0.5 ±3.1) MeV/c2, Γ(D_(s1)(2536)~-) =(1.7 ±1.2 ±0.6)MeV, and M(D_(s2)~*(2573)~-)=(2570.7±2.0 ±1.7) MeV/c~2, Γ(D_(s2)~*(2573)~-)=(17.2 ±3.6 ±1.1) MeV. The spin-parity of the D_(s2)~*(2573)~-meson is determined to be J~p= 2~+. In addition, the processes e~+e~-→D_s~+■~((*)0)K~-are searched for using the data samples taken at four(two) center-of-mass energies between 4.416(4.527) and 4.575 GeV, and upper limits at the 90% confidence level on the cross sections are determined.
Studies of e~+e~→D_s~+■~((*)0)K~-and the P-wave charmed-strange mesons are performed based on an e~+e~-collision data sample corresponding to an integrated luminosity of 567 pb~(-1) collected with the BESIII detector at s~(1/2)=4.600 GeV. The processes of e~+e~-→D_s~+■~(*0)K~- and D_s~+■~0K~- are observed for the first time and are found to be dominated by the modes D_s~+D_(s1)(2536)~-and D_s~+D_(s2)~*(2573)~-, respectively. The Born cross sections are measured to be σ~B(e~+e~-→D_s~+■~(*0)K~-) =(10.1±2.3±0.8) pb and σ~B(e~+e~-→D_s~+■~0K~-) =(19.4±2.3± 1.6) pb, and the products of Born cross section and the decay branching fraction are measured to be σ~B(e~+e~-→D_s~+D_(s1)(2536)~-+c.c.)·B(D_(s1)(2536)~-→■~(*0)K~-)=(7.5±1.8±0.7) pb and σ~B(e~+e~-→D_s~+D_(s2)~*(2573)~-+ c.c.)·B(D_(s2)~*(2573)~-→■~0 K~-)=(19.7 ± 2.9 ±2.0) pb. For the D_(s1)(2536)~-and D_(s2)~*(2573)~-mesons, the masses and widths are measured to be M(D_(s1)(2536)~-)=(2537.7±0.5 ±3.1) MeV/c2, Γ(D_(s1)(2536)~-) =(1.7 ±1.2 ±0.6)MeV, and M(D_(s2)~*(2573)~-)=(2570.7±2.0 ±1.7) MeV/c~2, Γ(D_(s2)~*(2573)~-)=(17.2 ±3.6 ±1.1) MeV. The spin-parity of the D_(s2)~*(2573)~-meson is determined to be J~p= 2~+. In addition, the processes e~+e~-→D_s~+■~((*)0)K~-are searched for using the data samples taken at four(two) center-of-mass energies between 4.416(4.527) and 4.575 GeV, and upper limits at the 90% confidence level on the cross sections are determined.
Studies of e~+e~→D_s~+■~((*)0)K~-and the P-wave charmed-strange mesons are performed based on an e~+e~-collision data sample corresponding to an integrated luminosity of 567 pb~(-1) collected with the BESIII detector at s~(1/2)=4.600 GeV. The processes of e~+e~-→D_s~+■~(*0)K~- and D_s~+■~0K~- are observed for the first time and are found to be dominated by the modes D_s~+D_(s1)(2536)~-and D_s~+D_(s2)~*(2573)~-, respectively. The Born cross sections are measured to be σ~B(e~+e~-→D_s~+■~(*0)K~-) =(10.1±2.3±0.8) pb and σ~B(e~+e~-→D_s~+■~0K~-) =(19.4±2.3± 1.6) pb, and the products of Born cross section and the decay branching fraction are measured to be σ~B(e~+e~-→D_s~+D_(s1)(2536)~-+c.c.)·B(D_(s1)(2536)~-→■~(*0)K~-)=(7.5±1.8±0.7) pb and σ~B(e~+e~-→D_s~+D_(s2)~*(2573)~-+ c.c.)·B(D_(s2)~*(2573)~-→■~0 K~-)=(19.7 ± 2.9 ±2.0) pb. For the D_(s1)(2536)~-and D_(s2)~*(2573)~-mesons, the masses and widths are measured to be M(D_(s1)(2536)~-)=(2537.7±0.5 ±3.1) MeV/c2, Γ(D_(s1)(2536)~-) =(1.7 ±1.2 ±0.6)MeV, and M(D_(s2)~*(2573)~-)=(2570.7±2.0 ±1.7) MeV/c~2, Γ(D_(s2)~*(2573)~-)=(17.2 ±3.6 ±1.1) MeV. The spin-parity of the D_(s2)~*(2573)~-meson is determined to be J~p= 2~+. In addition, the processes e~+e~-→D_s~+■~((*)0)K~-are searched for using the data samples taken at four(two) center-of-mass energies between 4.416(4.527) and 4.575 GeV, and upper limits at the 90% confidence level on the cross sections are determined.
引文
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28 G. Pakhlova et al(Belle Collaboration), Phys. Rev. Lett., 100:062001(2008)
29 M. Ablikim et al(BESIII Collaboration), Phys. Rev. Lett., 112:022001(2014)
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34 M. Ablikim et al(BESIII Collaboration), Chin. Phys. C, 40:063001(2016)
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36 C. H. Yu et al, Proceedings of IPAC2016, Busan, Korea, 2016,doi:10.18429/JACoW-IPAC2016-TUYA01
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38 S. Jadach, B. F. L. Ward, and Z. Was, Comput. Phys. Commun.,130:260(2000); Phys. Rev. D, 63:113009(2001)
39 D. J. Lange, Nucl. Instrum. Meth. A, 462:152(2001); R. G. Ping,Chin. Phys. C, 32:599(2008)
40 J. C. Chen, G. S. Huang, X. R. Qi, D. H. Zhang, and Y. S. Zhu,Phys. Rev. D, 62:034003(2000); R. L. Yang, R. G. Ping, and H.Chen, Chin. Phys. Lett., 31:061301(2014)
41 E. Richter-Was, Phys. Lett. B, 303:163(1993)
42 R. E. Mitchell et al, Phys. Rev. D, 79:072008(2009)
43 H. Albrecht et al(ARGUS Collaboration), Phys. Lett. B, 340:217(1994)
44 E. A. Kuraev and V. S. Fadin, Sov. J. Nucl. Phys., 41:466(1985)
45 F. Jegerlehner, Z. Phys. C, 32:195(1986)
46 V. Balagura et al(Belle Collaboration), Phys. Rev. D, 77:032001(2008)
47 M. Ablikim et al(BESIII Collaboration), Phys. Rev. Lett., 112:022001(2014)
2 N. Isgur and M. B. Wise, Phys. Rev. Lett., 66:1130(1991)
3 J. L. Rosner, Comments Nucl. Part. Phys., 16:109(1986)
4 M. Di Pierro and E. Eichten, Phys. Rev. D, 64:114004(2001)
5 M. Tanabashi et al(Particle Data Group), Phys. Rev. D, 98:010001(2018)
6 R. Aaij et al(LHCb Collaboration), Phys. Lett. B, 698:14(2011)
7 R. Aaij et al(LHCb Collaboration), Phys. Rev. Lett., 113:162001(2014)
8 B. Aubert et al(BABAR Collaboration), Phys. Rev. Lett., 97:222001(2006)
9 H. Albrecht et al(ARGUS Collaboration), Z. Phys. C, 69:405(1996)
10 Y. Kubota et al(CLEO Collaboration), Phys. Rev. Lett., 72:1972(1994)
11 R. Aaij et al(LHCb Collaboration), Phys. Rev. D., 90:072003(2014)
12 M. Ablikim et al(BESIII Collaboration), Phys. Lett. B, 660:315(2008)
13 B. Aubert et al(BABAR Collaboration), Phys. Rev. Lett., 95:142001(2005)
14 T. E. Coan et al(CLEO Collaboration), Phys. Rev. Lett., 96:162003(2006)
15 C. Z. Yuan et al(Belle Collaboration), Phys. Rev. Lett., 99:182004(2007)
16 B. Aubert et al(BABAR Collaboration), Phys. Rev. Lett., 98:212001(2007)
17 X. L. Wang et al(Belle Collaboration), Phys. Rev. Lett., 99:142002(2007)
18 G. Pakhlova et al(Belle Collaboration), Phys. Rev. D, 77:011103(2008)
19 G. Pakhlova et al(Belle Collaboration), Phys. Rev. Lett., 98:092001(2007)
20 G. Pakhlova et al(Belle Collaboration), Phys. Rev. Lett., 100:062001(2008)
21 G. Pakhlova et al(Belle Collaboration), Phys. Rev. D, 80:091101(2009)
22 G. Pakhlova et al(Belle Collaboration), Phys. Rev. Lett., 101:172001(2008)
23 G. Pakhlova et al(Belle Collaboration), Phys. Rev. D, 83:011101(2011)
24 B. Aubert et al(BABAR Collaboration), Phys. Rev. D, 76:111105(2007)
25 B. Aubert et al(BABAR Collaboration), Phys. Rev. D, 79:092001(2009)
26 P. del Amo Sanchez et al(BABAR Collaboration), Phys. Rev. D,82:052004(2010)
27 D. Cronin-Hennessy et al(CLEO Collaboration), Phys. Rev. D,80:072001(2009)
28 G. Pakhlova et al(Belle Collaboration), Phys. Rev. Lett., 100:062001(2008)
29 M. Ablikim et al(BESIII Collaboration), Phys. Rev. Lett., 112:022001(2014)
30 M. Ablikim et al(BESIII Collaboration), Phys. Rev. Lett., 115:222002(2015)
31 M. Ablikim et al(BESIII Collaboration), Phys. Rev. D, 92:092006(2015)
32 M. Ablikim et al(BESIII Collaboration), arXiv:1808.02847
33 M. Ablikim et al(BESIII Collaboration), Chin. Phys. C, 39:093001(2015)
34 M. Ablikim et al(BESIII Collaboration), Chin. Phys. C, 40:063001(2016)
35 M. Ablikim et al(BESIII Collaboration), Nucl. Instrum. Meth. A,614:345(2010)
36 C. H. Yu et al, Proceedings of IPAC2016, Busan, Korea, 2016,doi:10.18429/JACoW-IPAC2016-TUYA01
37 S. Agostinelli et al(GEANT4 Collaboration), Nucl. Instrum.Meth. A, 506:250(2003)
38 S. Jadach, B. F. L. Ward, and Z. Was, Comput. Phys. Commun.,130:260(2000); Phys. Rev. D, 63:113009(2001)
39 D. J. Lange, Nucl. Instrum. Meth. A, 462:152(2001); R. G. Ping,Chin. Phys. C, 32:599(2008)
40 J. C. Chen, G. S. Huang, X. R. Qi, D. H. Zhang, and Y. S. Zhu,Phys. Rev. D, 62:034003(2000); R. L. Yang, R. G. Ping, and H.Chen, Chin. Phys. Lett., 31:061301(2014)
41 E. Richter-Was, Phys. Lett. B, 303:163(1993)
42 R. E. Mitchell et al, Phys. Rev. D, 79:072008(2009)
43 H. Albrecht et al(ARGUS Collaboration), Phys. Lett. B, 340:217(1994)
44 E. A. Kuraev and V. S. Fadin, Sov. J. Nucl. Phys., 41:466(1985)
45 F. Jegerlehner, Z. Phys. C, 32:195(1986)
46 V. Balagura et al(Belle Collaboration), Phys. Rev. D, 77:032001(2008)
47 M. Ablikim et al(BESIII Collaboration), Phys. Rev. Lett., 112:022001(2014)
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