Observation of D1 (2420)+ and D2*(2460)+

T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; M. Ogg; A. Bellerive; D. I. Britton; E. R.F. Hyatt; D. B. MacFarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; S. Kotov; I. Kravchenko; N. Kwak; H. Lam; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'Neill; H. Severini; C. R. Sun; F. Wappler; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; M. Sung; C. White; M. M. Zoeller; F. Butler; X. Fu; B. Nemati; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P.J. Shipsey; P. N. Wang; M. Battle; J. Ernst; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang; J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Gao; M. Goldberg; D. He; N. Horwitz; G. C. Moneti; R. Mountain; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; Sheldon Stone; X. Xing; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; D. Gibaut; K. Kinoshita; P. Pomianowski; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'Grady; J. Urheim; A. J. Weinstein; M. Athanas; W. Brower; G. Masek; H. P. Paar; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; D. Sperka; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; P. S. Drell; D. J. Dumas; R. Ehrlich; P. Gaidarev; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; S. Henderson; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; S. Yang; J. Yelton; D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto

doi:10.1016/0370-2693(94)01348-9

Observation of D₁ (2420)⁺ and D₂^*(2460)⁺

T. Bergfeld, B. I. Eisenstein, G. Gollin, B. Ong, M. Palmer, M. Selen, J. J. Thaler, K. W. Edwards, M. Ogg, A. Bellerive, D. I. Britton, E. R.F. Hyatt, D. B. MacFarlane, P. M. Patel, B. Spaan, A. J. Sadoff, R. Ammar, P. Baringer, A. Bean, D. BessonD. Coppage, N. Copty, R. Davis, N. Hancock, M. Kelly, S. Kotov, I. Kravchenko, N. Kwak, H. Lam, Y. Kubota, M. Lattery, M. Momayezi, J. K. Nelson, S. Patton, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim, Z. Ling, A. H. Mahmood, J. J. O'Neill, H. Severini, C. R. Sun, F. Wappler, G. Crawford, C. M. Daubenmier, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, R. Malchow, M. Sung, C. White, M. M. Zoeller, F. Butler, X. Fu, B. Nemati, W. R. Ross, P. Skubic, M. Wood, M. Bishai, J. Fast, E. Gerndt, J. W. Hinson, R. L. McIlwain, T. Miao, D. H. Miller, M. Modesitt, D. Payne, E. I. Shibata, I. P.J. Shipsey, P. N. Wang, M. Battle, J. Ernst, L. Gibbons, Y. Kwon, S. Roberts, E. H. Thorndike, C. H. Wang, J. Dominick, M. Lambrecht, S. Sanghera, V. Shelkov, T. Skwarnicki, R. Stroynowski, I. Volobouev, G. Wei, P. Zadorozhny, M. Artuso, M. Gao, M. Goldberg, D. He, N. Horwitz, G. C. Moneti, R. Mountain, F. Muheim, Y. Mukhin, S. Playfer, Y. Rozen, Sheldon Stone, X. Xing, G. Zhu, J. Bartelt, S. E. Csorna, Z. Egyed, V. Jain, D. Gibaut, K. Kinoshita, P. Pomianowski, B. Barish, M. Chadha, S. Chan, D. F. Cowen, G. Eigen, J. S. Miller, C. O'Grady, J. Urheim, A. J. Weinstein, M. Athanas, W. Brower, G. Masek, H. P. Paar, J. Gronberg, R. Kutschke, S. Menary, R. J. Morrison, S. Nakanishi, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, A. Ryd, D. Sperka, H. Tajima, M. S. Witherell, R. Balest, K. Cho, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, J. G. Smith, J. P. Alexander, C. Bebek, K. Berkelman, K. Bloom, T. E. Browder, D. G. Cassel, H. A. Cho, D. M. Coffman, D. S. Crowcroft, P. S. Drell, D. J. Dumas, R. Ehrlich, P. Gaidarev, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, S. Henderson, C. D. Jones, S. L. Jones, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, C. R. Ng, E. Nordberg, J. R. Patterson, D. Peterson, D. Riley, S. Salman, M. Sapper, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, S. Yang, J. Yelton, D. Cinabro, T. Liu, M. Saulnier, R. Wilson, H. Yamamoto

Department of Physics

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

Using the CLEO II detector at CESR, we have observed two charmed states, where the higher mass state decays to D⁰π⁺ and to D^*0π⁺, while the lower mass state decays to D^*0π⁺, but not to D⁰π⁺. The masses and widths were measured to be 2425±2±2 MeV/c² and 26_-7-4⁺⁸⁺⁴ MeV/c² for the lower mass state, and 2463±3±3 MeV/c² and 27_-8-5⁺¹¹⁺⁵ MeV/c² for the higher mass state. Properties of these states, including their decay angular distributions and spin-parity assignments have been studied. The results of this analysis support the identification of these states as the charged L = 1 D₁ (2420)⁺ and D₂^* (2460)⁺, respectively. The isospin mass splittings between these states and their neutral partners have also been measured. This is the first full reconstruction of any decay mode of the D₁ (2420)⁺ and the first observation of the decay of D₂^* (2460)⁺ to D^*0π⁺.

Original language	English (US)
Pages (from-to)	194-204
Number of pages	11
Journal	Physics Letters B
Volume	340
Issue number	3
DOIs	https://doi.org/10.1016/0370-2693(94)01348-9
State	Published - Dec 8 1994

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/0370-2693(94)01348-9

Cite this

Bergfeld, T., Eisenstein, B. I., Gollin, G., Ong, B., Palmer, M., Selen, M., Thaler, J. J., Edwards, K. W., Ogg, M., Bellerive, A., Britton, D. I., Hyatt, E. R. F., MacFarlane, D. B., Patel, P. M., Spaan, B., Sadoff, A. J., Ammar, R., Baringer, P., Bean, A., ... Yamamoto, H. (1994). Observation of D₁ (2420)⁺ and D₂^*(2460)⁺. Physics Letters B, 340(3), 194-204. https://doi.org/10.1016/0370-2693(94)01348-9

Bergfeld, T, Eisenstein, BI, Gollin, G, Ong, B, Palmer, M, Selen, M, Thaler, JJ, Edwards, KW, Ogg, M, Bellerive, A, Britton, DI, Hyatt, ERF, MacFarlane, DB, Patel, PM, Spaan, B, Sadoff, AJ, Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Copty, N, Davis, R, Hancock, N, Kelly, M, Kotov, S, Kravchenko, I, Kwak, N, Lam, H, Kubota, Y, Lattery, M, Momayezi, M, Nelson, JK, Patton, S, Poling, R, Savinov, V, Schrenk, S, Wang, R, Alam, MS, Kim, IJ, Ling, Z, Mahmood, AH, O'Neill, JJ, Severini, H, Sun, CR, Wappler, F, Crawford, G, Daubenmier, CM, Fulton, R, Fujino, D, Gan, KK, Honscheid, K, Kagan, H, Kass, R, Lee, J, Malchow, R, Sung, M, White, C, Zoeller, MM, Butler, F, Fu, X, Nemati, B, Ross, WR, Skubic, P, Wood, M, Bishai, M, Fast, J, Gerndt, E, Hinson, JW, McIlwain, RL, Miao, T, Miller, DH, Modesitt, M, Payne, D, Shibata, EI, Shipsey, IPJ, Wang, PN, Battle, M, Ernst, J, Gibbons, L, Kwon, Y, Roberts, S, Thorndike, EH, Wang, CH, Dominick, J, Lambrecht, M, Sanghera, S, Shelkov, V, Skwarnicki, T, Stroynowski, R, Volobouev, I, Wei, G, Zadorozhny, P, Artuso, M, Gao, M, Goldberg, M, He, D, Horwitz, N, Moneti, GC, Mountain, R, Muheim, F, Mukhin, Y, Playfer, S, Rozen, Y, Stone, S, Xing, X, Zhu, G, Bartelt, J, Csorna, SE, Egyed, Z, Jain, V, Gibaut, D, Kinoshita, K, Pomianowski, P, Barish, B, Chadha, M, Chan, S, Cowen, DF, Eigen, G, Miller, JS, O'Grady, C, Urheim, J, Weinstein, AJ, Athanas, M, Brower, W, Masek, G, Paar, HP, Gronberg, J, Kutschke, R, Menary, S, Morrison, RJ, Nakanishi, S, Nelson, HN, Nelson, TK, Qiao, C, Richman, JD, Ryd, A, Sperka, D, Tajima, H, Witherell, MS, Balest, R, Cho, K, Ford, WT, Johnson, DR, Lingel, K, Lohner, M, Rankin, P, Smith, JG, Alexander, JP, Bebek, C, Berkelman, K, Bloom, K, Browder, TE, Cassel, DG, Cho, HA, Coffman, DM, Crowcroft, DS, Drell, PS, Dumas, DJ, Ehrlich, R, Gaidarev, P, Garcia-Sciveres, M, Geiser, B, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Henderson, S, Jones, CD, Jones, SL, Kandaswamy, J, Katayama, N, Kim, PC, Kreinick, DL, Ludwig, GS, Masui, J, Mevissen, J, Mistry, NB, Ng, CR, Nordberg, E, Patterson, JR, Peterson, D, Riley, D, Salman, S, Sapper, M, Würthwein, F, Avery, P, Freyberger, A, Rodriguez, J, Yang, S, Yelton, J, Cinabro, D, Liu, T, Saulnier, M, Wilson, R & Yamamoto, H 1994, 'Observation of D₁ (2420)⁺ and D₂^*(2460)⁺', Physics Letters B, vol. 340, no. 3, pp. 194-204. https://doi.org/10.1016/0370-2693(94)01348-9

@article{6d0feef63cb24166809a02d50c8c5fff,

title = "Observation of D1 (2420)+ and D2*(2460)+",

abstract = "Using the CLEO II detector at CESR, we have observed two charmed states, where the higher mass state decays to D0π+ and to D*0π+, while the lower mass state decays to D*0π+, but not to D0π+. The masses and widths were measured to be 2425±2±2 MeV/c2 and 26-7-4+8+4 MeV/c2 for the lower mass state, and 2463±3±3 MeV/c2 and 27-8-5+11+5 MeV/c2 for the higher mass state. Properties of these states, including their decay angular distributions and spin-parity assignments have been studied. The results of this analysis support the identification of these states as the charged L = 1 D1 (2420)+ and D2* (2460)+, respectively. The isospin mass splittings between these states and their neutral partners have also been measured. This is the first full reconstruction of any decay mode of the D1 (2420)+ and the first observation of the decay of D2* (2460)+ to D*0π+.",

author = "T. Bergfeld and Eisenstein, {B. I.} and G. Gollin and B. Ong and M. Palmer and M. Selen and Thaler, {J. J.} and Edwards, {K. W.} and M. Ogg and A. Bellerive and Britton, {D. I.} and Hyatt, {E. R.F.} and MacFarlane, {D. B.} and Patel, {P. M.} and B. Spaan and Sadoff, {A. J.} and R. Ammar and P. Baringer and A. Bean and D. Besson and D. Coppage and N. Copty and R. Davis and N. Hancock and M. Kelly and S. Kotov and I. Kravchenko and N. Kwak and H. Lam and Y. Kubota and M. Lattery and M. Momayezi and Nelson, {J. K.} and S. Patton and R. Poling and V. Savinov and S. Schrenk and R. Wang and Alam, {M. S.} and Kim, {I. J.} and Z. Ling and Mahmood, {A. H.} and O'Neill, {J. J.} and H. Severini and Sun, {C. R.} and F. Wappler and G. Crawford and Daubenmier, {C. M.} and R. Fulton and D. Fujino and Gan, {K. K.} and K. Honscheid and H. Kagan and R. Kass and J. Lee and R. Malchow and M. Sung and C. White and Zoeller, {M. M.} and F. Butler and X. Fu and B. Nemati and Ross, {W. R.} and P. Skubic and M. Wood and M. Bishai and J. Fast and E. Gerndt and Hinson, {J. W.} and McIlwain, {R. L.} and T. Miao and Miller, {D. H.} and M. Modesitt and D. Payne and Shibata, {E. I.} and Shipsey, {I. P.J.} and Wang, {P. N.} and M. Battle and J. Ernst and L. Gibbons and Y. Kwon and S. Roberts and Thorndike, {E. H.} and Wang, {C. H.} and J. Dominick and M. Lambrecht and S. Sanghera and V. Shelkov and T. Skwarnicki and R. Stroynowski and I. Volobouev and G. Wei and P. Zadorozhny and M. Artuso and M. Gao and M. Goldberg and D. He and N. Horwitz and Moneti, {G. C.} and R. Mountain and F. Muheim and Y. Mukhin and S. Playfer and Y. Rozen and Sheldon Stone and X. Xing and G. Zhu and J. Bartelt and Csorna, {S. E.} and Z. Egyed and V. Jain and D. Gibaut and K. Kinoshita and P. Pomianowski and B. Barish and M. Chadha and S. Chan and Cowen, {D. F.} and G. Eigen and Miller, {J. S.} and C. O'Grady and J. Urheim and Weinstein, {A. J.} and M. Athanas and W. Brower and G. Masek and Paar, {H. P.} and J. Gronberg and R. Kutschke and S. Menary and Morrison, {R. J.} and S. Nakanishi and Nelson, {H. N.} and Nelson, {T. K.} and C. Qiao and Richman, {J. D.} and A. Ryd and D. Sperka and H. Tajima and Witherell, {M. S.} and R. Balest and K. Cho and Ford, {W. T.} and Johnson, {D. R.} and K. Lingel and M. Lohner and P. Rankin and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and K. Berkelman and K. Bloom and Browder, {T. E.} and Cassel, {D. G.} and Cho, {H. A.} and Coffman, {D. M.} and Crowcroft, {D. S.} and Drell, {P. S.} and Dumas, {D. J.} and R. Ehrlich and P. Gaidarev and M. Garcia-Sciveres and B. Geiser and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and S. Henderson and Jones, {C. D.} and Jones, {S. L.} and J. Kandaswamy and N. Katayama and Kim, {P. C.} and Kreinick, {D. L.} and Ludwig, {G. S.} and J. Masui and J. Mevissen and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and Patterson, {J. R.} and D. Peterson and D. Riley and S. Salman and M. Sapper and F. W{\"u}rthwein and P. Avery and A. Freyberger and J. Rodriguez and S. Yang and J. Yelton and D. Cinabro and T. Liu and M. Saulnier and R. Wilson and H. Yamamoto",

year = "1994",

month = dec,

day = "8",

doi = "10.1016/0370-2693(94)01348-9",

language = "English (US)",

volume = "340",

pages = "194--204",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Observation of D1 (2420)+ and D2*(2460)+

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Gollin, G.

AU - Ong, B.

AU - Palmer, M.

AU - Selen, M.

AU - Thaler, J. J.

AU - Edwards, K. W.

AU - Ogg, M.

AU - Bellerive, A.

AU - Britton, D. I.

AU - Hyatt, E. R.F.

AU - MacFarlane, D. B.

AU - Patel, P. M.

AU - Spaan, B.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Baringer, P.

AU - Bean, A.

AU - Besson, D.

AU - Coppage, D.

AU - Copty, N.

AU - Davis, R.

AU - Hancock, N.

AU - Kelly, M.

AU - Kotov, S.

AU - Kravchenko, I.

AU - Kwak, N.

AU - Lam, H.

AU - Kubota, Y.

AU - Lattery, M.

AU - Momayezi, M.

AU - Nelson, J. K.

AU - Patton, S.

AU - Poling, R.

AU - Savinov, V.

AU - Schrenk, S.

AU - Wang, R.

AU - Alam, M. S.

AU - Kim, I. J.

AU - Ling, Z.

AU - Mahmood, A. H.

AU - O'Neill, J. J.

AU - Severini, H.

AU - Sun, C. R.

AU - Wappler, F.

AU - Crawford, G.

AU - Daubenmier, C. M.

AU - Fulton, R.

AU - Fujino, D.

AU - Gan, K. K.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Malchow, R.

AU - Sung, M.

AU - White, C.

AU - Zoeller, M. M.

AU - Butler, F.

AU - Fu, X.

AU - Nemati, B.

AU - Ross, W. R.

AU - Skubic, P.

AU - Wood, M.

AU - Bishai, M.

AU - Fast, J.

AU - Gerndt, E.

AU - Hinson, J. W.

AU - McIlwain, R. L.

AU - Miao, T.

AU - Miller, D. H.

AU - Modesitt, M.

AU - Payne, D.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Wang, P. N.

AU - Battle, M.

AU - Ernst, J.

AU - Gibbons, L.

AU - Kwon, Y.

AU - Roberts, S.

AU - Thorndike, E. H.

AU - Wang, C. H.

AU - Dominick, J.

AU - Lambrecht, M.

AU - Sanghera, S.

AU - Shelkov, V.

AU - Skwarnicki, T.

AU - Stroynowski, R.

AU - Volobouev, I.

AU - Wei, G.

AU - Zadorozhny, P.

AU - Artuso, M.

AU - Gao, M.

AU - Goldberg, M.

AU - He, D.

AU - Horwitz, N.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Muheim, F.

AU - Mukhin, Y.

AU - Playfer, S.

AU - Rozen, Y.

AU - Stone, Sheldon

AU - Xing, X.

AU - Zhu, G.

AU - Bartelt, J.

AU - Csorna, S. E.

AU - Egyed, Z.

AU - Jain, V.

AU - Gibaut, D.

AU - Kinoshita, K.

AU - Pomianowski, P.

AU - Barish, B.

AU - Chadha, M.

AU - Chan, S.

AU - Cowen, D. F.

AU - Eigen, G.

AU - Miller, J. S.

AU - O'Grady, C.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Athanas, M.

AU - Brower, W.

AU - Masek, G.

AU - Paar, H. P.

AU - Gronberg, J.

AU - Kutschke, R.

AU - Menary, S.

AU - Morrison, R. J.

AU - Nakanishi, S.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Qiao, C.

AU - Richman, J. D.

AU - Ryd, A.

AU - Sperka, D.

AU - Tajima, H.

AU - Witherell, M. S.

AU - Balest, R.

AU - Cho, K.

AU - Ford, W. T.

AU - Johnson, D. R.

AU - Lingel, K.

AU - Lohner, M.

AU - Rankin, P.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berkelman, K.

AU - Bloom, K.

AU - Browder, T. E.

AU - Cassel, D. G.

AU - Cho, H. A.

AU - Coffman, D. M.

AU - Crowcroft, D. S.

AU - Drell, P. S.

AU - Dumas, D. J.

AU - Ehrlich, R.

AU - Gaidarev, P.

AU - Garcia-Sciveres, M.

AU - Geiser, B.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Henderson, S.

AU - Jones, C. D.

AU - Jones, S. L.

AU - Kandaswamy, J.

AU - Katayama, N.

AU - Kim, P. C.

AU - Kreinick, D. L.

AU - Ludwig, G. S.

AU - Masui, J.

AU - Mevissen, J.

AU - Mistry, N. B.

AU - Ng, C. R.

AU - Nordberg, E.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Salman, S.

AU - Sapper, M.

AU - Würthwein, F.

AU - Avery, P.

AU - Freyberger, A.

AU - Rodriguez, J.

AU - Yang, S.

AU - Yelton, J.

AU - Cinabro, D.

AU - Liu, T.

AU - Saulnier, M.

AU - Wilson, R.

AU - Yamamoto, H.

PY - 1994/12/8

Y1 - 1994/12/8

N2 - Using the CLEO II detector at CESR, we have observed two charmed states, where the higher mass state decays to D0π+ and to D*0π+, while the lower mass state decays to D*0π+, but not to D0π+. The masses and widths were measured to be 2425±2±2 MeV/c2 and 26-7-4+8+4 MeV/c2 for the lower mass state, and 2463±3±3 MeV/c2 and 27-8-5+11+5 MeV/c2 for the higher mass state. Properties of these states, including their decay angular distributions and spin-parity assignments have been studied. The results of this analysis support the identification of these states as the charged L = 1 D1 (2420)+ and D2* (2460)+, respectively. The isospin mass splittings between these states and their neutral partners have also been measured. This is the first full reconstruction of any decay mode of the D1 (2420)+ and the first observation of the decay of D2* (2460)+ to D*0π+.

AB - Using the CLEO II detector at CESR, we have observed two charmed states, where the higher mass state decays to D0π+ and to D*0π+, while the lower mass state decays to D*0π+, but not to D0π+. The masses and widths were measured to be 2425±2±2 MeV/c2 and 26-7-4+8+4 MeV/c2 for the lower mass state, and 2463±3±3 MeV/c2 and 27-8-5+11+5 MeV/c2 for the higher mass state. Properties of these states, including their decay angular distributions and spin-parity assignments have been studied. The results of this analysis support the identification of these states as the charged L = 1 D1 (2420)+ and D2* (2460)+, respectively. The isospin mass splittings between these states and their neutral partners have also been measured. This is the first full reconstruction of any decay mode of the D1 (2420)+ and the first observation of the decay of D2* (2460)+ to D*0π+.

UR - http://www.scopus.com/inward/record.url?scp=0141514893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141514893&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(94)01348-9

DO - 10.1016/0370-2693(94)01348-9

M3 - Article

AN - SCOPUS:0141514893

SN - 0370-2693

VL - 340

SP - 194

EP - 204

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3

ER -

Observation of D₁ (2420)⁺ and D₂^*(2460)⁺

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