OBSERVATION OF D(1)(2420)+ AND D(2)(ASTERISK)(2460)+

被引:29
作者
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
ONEILL, JJ
SEVERINI, H
SUN, CR
WAPPLER, F
CRAWFORD, G
DAUBENMIER, CM
FULTON, R
FUJINO, D
机构
[1] CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA
[2] MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA
[3] ITHACA COLL,ITHACA,NY 14850
[4] UNIV KANSAS,LAWRENCE,KS 66045
[5] UNIV MINNESOTA,MINNEAPOLIS,MN 55455
[6] SUNY ALBANY,ALBANY,NY 12222
[7] OHIO STATE UNIV,COLUMBUS,OH 43210
[8] UNIV OKLAHOMA,NORMAN,OK 73019
[9] PURDUE UNIV,W LAFAYETTE,IN 47907
[10] UNIV ROCHESTER,ROCHESTER,NY 14627
[11] SO METHODIST UNIV,DALLAS,TX 75275
[12] SYRACUSE UNIV,SYRACUSE,NY 13244
[13] VANDERBILT UNIV,NASHVILLE,TN 37240
[14] VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061
[15] CALTECH,PASADENA,CA 91125
[16] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093
[17] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106
[18] UNIV COLORADO,BOULDER,CO 80309
[19] CORNELL UNIV,ITHACA,NY 14853
[20] UNIV FLORIDA,GAINESVILLE,FL 32611
[21] HARVARD UNIV,CAMBRIDGE,MA 02138
关键词
D O I
10.1016/0370-2693(94)01348-9
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Using the CLEO II detector at CESR, we have observed two charmed states, where the higher mass state decays to D0pi+ and to D*0pi+, while the lower mass state decays to D*0pi+, but not to D0pi+, but not to D0pi+. The masses and widths were measured to be 2425 +/- 2 +/- 2 MeV/c2 and 26(+8+4)-7-4 MeV/c2 for the lower mass state, and 2463 +/- 3 +/- 3 MeV/c2 and 27(+11+5)-8-5 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 D*2(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*0pi+.
引用
收藏
页码:194 / 204
页数:11
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