VI1.126

Meson Full Listings D3(24r0) ±,

I I I(JP) : } ( 7 ? ) D-)(2470) ± /needs confirmation.

OMITTED FROM SUMMARY TABLE

Seen in D0rr +.

D~(2470) ± MASS

VALUE (MeV) DOCUMENT ID TEEN COMMENT

2 4 6 9 ± 4 ± 6 A L B R E C H T 89F ARG e "~ e - ~ DO ~r~ X

D~(2470) + - D~(2460) ° MASS DIFFERENCE

VALUE (MeV) DOCUMENT IO TECN COMMENT

1 4 ± 5 - E 8 A L B R E C H T 89E ARG e ~ e - - D O ,~+ X

D~(2470) + DECAY MODES

D ~ ( 2 4 7 0 ) modes are charge conjugates of the modes below.

Mode Fraction ( F i / F )

F 1 DO ~" + seen

three-pion Dalitz plot by E691 and confirmed by Mark III.

The f0rc mode is predicted by the weak spectator decay as the

f0 is believed to be the scalar with hidden strangeness below

K K threshold. The evidence for the qrc and q~rc modes is still

controversial. A previous Mark II measurement reported a rate

relative to 0re of 3.0 ± 1.1 and 4.8 :t: 2.1 l° for these modes

respectively. Recently E691 and Mark III have set upper limits

whereas NA14 ~ has now seen a very large signal in r/Tr. The

final answer may lie somewhere in between and will have to

await more experimental data.

Table 1. D, Hadronic Decay' Modes

D~(2470) + BRANCHING RATIOS

r (D O rr+)/rtotal h/r VALUE DOCUMENT ID TECN COMMENT

seen A L B R E C H T 89F ARG e + e ~ D O rr + X

D~(2470) ± REFERENCES

ALBRECHT 89F PL B231 208 *Glaese~* (ARGUS Collab }

CHARMED STRANGE MESONS (C= S= +1)

D + = c~, D ~ = Es, similarly for D~'s

] D~ [ l(J p) = 0(0 )

w a s F ±

Quantum numbers not measured. Values are assigned here assuming charmed-strange ground state Ds meson, CHEN 83B observations are con- sistent with J = 0. BLAYLOCK 87 observations are consistent with JP =

0 .

N O T E O N T H E D ~ D E C A Y S

( b y W . H . T o k i , SLAC)

New data on D.~ decays in this edition come from tile

CLEO, ACCMOR, NAI4': Mark II1, and ARGUS groups.

This brief note discusses new results in hadronic decays, the

absolute branching ratios, and the P wave D~ candidates,

obtained from recent publications, preprints, and summaries. I

The new D, hadronic modes and recent measurements

which differ substantially from previous measurenlents are

listed in Table 1 by' mode. The mode K°K*(892) + is analogous

to the K°K + and K*(892)°K + modes previously observed and

is seen at a comparable rate to that of 0re. The existence of

these KK decays indicates that tile strength of the internal I.V

emission diagrams is sizeable. The O ~ rc{I mode is seen only

ill one experiment, and due to tile linfited statistics, it is not

possible to deternfine if the decay is through the quasi-two

body mode Cp0. The f%r mode has now been seen in the

Decay' Mode F(Mode)/F(D~ -+ Orc ±) Group

K°K*(892) ~ 0.89±0.32 ACCOR 2

K°K*(892) + 1.20:t_2.1 CLEO a

ore+,@ < 3.5 at 90%CL NAI4 '4

orc+Tr ° 2.4±1.0±0.5 TPS 5

~r%r rc ~r ° < 3.3 at 90~CL TPS 5

~'~' < 0.5 at 90%CL TPS s

f % 0.28 ± 0.21 + 0.28 TPS 6

forc 0.58 ± 0.21 ± 0.28 Mark III 7

q,'r* < 1.5 at 90%CL TPS 5

q,-r ~ < 2.5 at 90%CL Mark III a

q'rc- < 1.9 at 90%CL Mark IIIa

q'~* 6.9 ± 2.4 ± 1.4 NA14 '9

All branching ratios of the Ds are currently normalized to

that of the 0re mode. Therefore knowledge of B(6~r) is required

to derive the absolute branching ratios of the other modes.

There are three different approaches to estimate this ratio, all

from c ( production:

Tile first ntethod experimentally measures the inclusive rate

of CE~xp(e - e ~ D~ D, ~ arc) and theoretically determines

the total D.~ cross section, ath(e+e ~ D~), from estimates of

the total charm content in R and estimates of the strange sea.

The absolute branching ratio is then

B(D~ --+ 07r) = cr~xp(C~ --+ D.~. D~ ~ ~rc) {Tth ( e q - C ~ D,)

The second method from tile CLEO group attempts a

more precis<! estimate of ~th(e~e ~ D~) by again estimating

the total charm content in R and by measuring all the charm

baryons and mesons (except tile Ds) and attributing the

remaining nfissing charln fl'om e+e production to the D,.

The third method searches for associated production of

exclusive D., pairs in e~e production into various decay

modes near threshold and compares the rate to the inclusive

D~ production ill the same decay modes. Thus the branching

ratio for the ore mode is equal to

B(D~Orc) = a~xP(C+( - -D2D~ D2~¢rc- ' D'~Ozc ) a,×p(( + e ~ D[, D~ -- 6rc--)

See key on page IV. 1

This technique, often called the double-tag method, was

a t tempted by the Mark III for the Ds but because of limited

statist ics no events were found and an upper limit was set.

The first two approaches are model dependent and require

several theoretical est imates. The last approach is model inde-

pendent but will require more da ta to obtain a measurement .

As the ¢~r branching ratio drops, we expect tha t there exist

many more decays tha t have not been measured. These miss-

ing decay modes should contain hidden s t rangeness and are

probably a t t r ibuted to s tates with high-charged multiplicities

and /o r many neutral secondaries.

V I 1 . 1 2 7

Meson Full Listings D~

11. S. Wasserbaech, unpubl ished Ph.D. thesis, Stanford Uni- versity, June 1989, see Table 6.1.

12. W. Chen et el., Phys. Lett. 8 2 2 6 , 192 (1989). 13. J. Adler et al., Phys. Rev. Lett. 64, 169 (1990). 14. H. Albrecht et al., Phys. Lett. 8230, 163 (1989). 15. P. Avery et al., Phys. Rev. D41 , 774 (1990).

Table 2. Absolute Ds --~ &Tr Branching Ratio Es t imates

Absolute Method B(Ds ~ OTr) Group

Charm cont inuum es t imate 1.7 - 13% Many groups 11

All inclusive measurement 2 4- 1% CLEO 12

Associated production < 4.1 at 90%CL Mark II113

Table 3. Excited P-Wave D, Candidate

D e c a y

Mode Mass Wid th Group

D*+K ° 2535.9+0.6 4- 2.0 MeV/c 2 < 4.6 MeV/c 2 ARGUS 14

D * + K ° 2535.64-0.7 4- 0.4 MeV/c 2 < 5.44 MeV/c 2 C L E @ 5

D~ M A S S

The fit includes the D E, D 0, D~, and D*¢ ± . . . . . . . . d the D O - D ± , D~ - D E ,

and D~ ± - Ds ~ mass differences.

VALUE (MeV) EVT5 DOCUMENT ID TECN CH6 COMMENT 1968.8± 0.1 OUR FIT Error includes scale factor of 1.1. 1969.14 1.2 OUR AVERAGE Error includes scale factor of 1.3. See the ideogram

below. 1 BARLAG 90c CCD n - Cu 230 I

2 ALBRECHT 88 ARG F - ~ ev I 9.4-10.6 GeV

3 ANJOS 88 SILl Photoproduc- I tion

BECKER 87B SILl 200 GeV rc,K,p

BLAYLOCK 87 MRK3 F~em = 4.14 GeV

USHIDA 86 EMUL u wideband DERRICK 85B HRS F.~e= 29

GeV AIHARA 84D TPC E~ e = 29

GeV ALTHOFF 84 TASS ± F~em = 14-25

GeV CHEN 83c CLEO ± E~ e = 10.5

GeV data for averages, fits, limits, etc. • • •

ALBRECHT 85D ARG F~ e = 10 GeV

BAILEY 84 SILl hadron + Be ~ r + X

4 ATKINSON 83 OMEG ± "rP 5 ASTON 81 OMEG -t- 7P

ASTON 818 OMEG ± 7P A M M A R 80 HYBR -I- v wideband USHIDA 808 EMUL - FNAL u wide-

band USHIDA 80s EMUL + FNAL v wide-

band BRANDELIK 79 DASP ± E~em=4.42

GeV BRANDELIK 77B DASP ± In BRANDE-

LIK 79 1BARLAG 90C use 54 DS + ~ K + K ~+ decays. | 2ALBRECHT 88 calculate their mass using the ARGUS value of re(DO) = 1864.1 E 1.4 I MeV which is 0.5 MeV lower than the world average. 3ANJOS 88 enters fit via the D~ - D E mass difference (see below). Their mass value is

1968.3 ± 0.7 E 0.7 MeV, 4ATKINSON 83 mass error includes systematic uncertainties. 5 Error quoted by ASTON 81 is 10 MeV statistical and <20 MeV systematic aver-

age of three modes listed in sections r(~l r r+) /F{d~r + ) , r(qTr ~" =+ ~ r - ) / r to ta l , and r(~/(958)~r + rr + ~r - ] /F to ta I below.

WEIGHTED AVERAGE 1969.1 • 1.2 (Error sca led by 1.3)

" ' ~ ' ~ " ~ - I - Values above of weighted average, error, and scale factor ere based upon the data in

~ " this ideogram only. They are not neces- ~ '~ j sari ly the same as our "best" values,

,~, obtained from a least-squares constrained fit ~ / util izing measurements of other (related}

quantities as additional information. X 2

L < . . . . . . . . . BARLAG 90C CCD - 7 7 ] ~ ~ . . . . . . . . . ALBRECHT 88 ABG 0.0 J -~. _--P£ . . . . . . . . BECKER 87B SILl 4.1 | ~ . . . . . . BLAYLOCK 87 MRK3 0,4

_ I ~ . I ' ) USHIDA B6 EMUL • ~ - I - ~ ' ~ . . . . . . . . DERRICK 85B HRS 2.0

' I ~.~ 1 . . . . . . AIHARA 84D TPC ALTHOFF 84 TASS 0.2

~ C.HEN 83C CLEO 8.900

(Con f idence Level = 0.181) I

198( 1960 1970 1980 1990 2 0 0 0

Both ARGUS and CLEO observe a narrow resonance in

tlhe mode Dsj(2536) + ~ D*(2010)+K ° as shown in Table 3.

This can be identified as the P-wave c~ s tate tha t s trongly

decays into charmed and s t range mesons. The lack of evidence

of the mode D+K ° suggests tha t the s ta te is not the lowest-

lying P-wave scalar but possibly the 1P 1 or 3p1 state. The

mass is roughly 100 MeV/c ~ above the P-wave c~ candidate

at 2428 MeV/c 2. This is where the P-wave c~ candidate is ex-

pected since the P-wave mass spli t t ings between charm-s t range

and charm-nons t range mesons should follow the S-wave split-

tings, M(cs, 1S0) - M(cg, 1So) ~ M(cs, 3S1) - M(cg, 3S1)

100 MeV/c 2. The width is surprisingly narrow but may be a

consequence of mixing between the two 1 + states.

l : t e fe renees

1. For recent reviews see P. Karchin, Proceedings of the 1989 International Symposium on Lepton Photon Interactions at High Energies, Stanford University, Stanford, CA (August 1989) and R. Morrison and M. Witherell , Ann. Rev. of Nucl. and Part . Sci. 39, 183 (1989).

:2. S. Barlag et al., preprint CERN-EP/88-103, (August 1988).

3. W. Chert et el., Phys. Lett. B226 , 192 (1989).

4. M. Alvarez et el., CERN-EP/88-148, (October 1988).

5. J. Anjos et el., Phys. Lett. B223 , 26T (1989).

6. J.C. Anjos et al., Phys. Rev. Lett. 62, 267 (1989).

T. J. Adler et el., SLAC-PUB-5052, (August 1989).

8. T. Browder, SLAC-PUB-5118, (October 1989).

9. G. Wormser, LBL-89-10, (May 1989).

10. G. Wormser et al., Phys. Rev. Lett. 61, 1057 (1988).

1967.0± 1 .0± 1.0 54

1969.3± 1 .4± 1.4

290

1972.7E 1.5E 1.0 21

1972.4± 3 .7± 3.7 27

1980.0± 15.0 6 1963 ± 3 ± 3 30

1948 ± 28 ± I0 65

1975 ± 9 E I0 49

1970 ± 5 ± 5 104

• • • We do not use the following

1973.6:c 2 .6± 3.0 163

1975.0± 4.0 3

2017 ± 13 i?

2020 E I0 E20 460 2049 ± 15 30 2017 ± 25 1

2026 ± 56 I

2089 ± 121 1

2030 E 60 6

2030 E 60 4

Ds ~ mass ( M e V )

VI I .128

Meson Full Listings

D~-= - D ± MASS DIFFERENCE

VALUE (MeV} EVT5 DOCUMENT ID TEEN COMMENT 99.5±0.6 OUR FIT Error includes scale factor of 1.1. 99.5±0.7 OUR AVERAGE 985±1.5 555 CHEN 89 CLEO E~e= 10.5 GeV 99.8±0 8 290 ANJOS 88 SILl Photoproduction

D~ MEAN LIFE

VALUE (io 13 s l EVT5 DOCUMENT ID TEEN CH6 COMMENT

4 a~+0.35 OUR AVERAGE " ~ - 0.29

~Q+l.02 54 6 BARLAG 90C CCD ~r Cu 230 GeV 4 . ~ _. 0.86

3.1 +2.4 ±0.5 AVERILL 89 HRS Eceem= 29 GeV 2.0

5.6 +1.3 ± 0 8 ALBRECHT 881 ARG Ecee= 10 GeV 1.2 47 ±0.4 ± 0 2 230 RAAB 88 SILl Photoproduction

33 + 10 21 7 BECKER 87~ SILl 200 GeV = , K , p 0.6

5.7 +3.6 ±0.9 9 BRAUNSCH... 87 TASS F.~em = 35 44 GeM 2.6 4.7 ± 2 2 = 0 5 141 CSORNA 87 CLEO F_~em = i0 GeV

3.5 ~2.4 ± 0 9 17 JUNG 88 HRS + e+e --- o~r+X 1.8

26 +1.6 6 USHIDA 86 EMUL u wideband -0 .9 • • • We do not use the following data for averages, fits, limits, etc. • • •

4.8 +0.6 t 0 2 99 ANJO5 87B SILl Repl. by 0 . 5 RAAB 88 3.2 ~ 30 3 BAILEY 84 SILl hadron ÷ Be

1.3 ~ + X

1.9 f 1,3 4 USHIDA 83 EMUL Repl. by - 0 7 USHIDA 86 1.4 1 AMMAR 80 HYBR + u wideband

2 ~ + 2 . 7 8 2 USHIDA 80B EMUL z, wideband ""~ 1.05

6 BARLAG 90c estimate systematic error to be negligible. 7 BECKER 87B say systematic error was negligible.

D + DECAY MODES

D s modes are charge conjugates of the modes below.

Values are all based on rough estimate of Ds ~ to total charm production. Only ratios of each fraction to the @~+ mode are well known.

Mode Fraction ( r i / r ) Confidence level

F 1 d,Tr -t

F 2 ~ z + 7r+ 7r F 3 p0T,+

F 4 K0~T +

F5 K O K +

F 6 K * ( 8 9 2 ) 0 K ÷

F7 K * ( 8 9 2 ) + ~ 0

F 8 K + K ~ + (non- resonant ) r 9 K ~ K ~T*~T 7r+ (non-res.)

F10 I~ + I/

F l l ~ /=+ F12 U z + Tr+/r F13 ~/(958)7r~ ~ +Tr F14 ~ p + F15 n'(958)~ + Ft6 f0(975) 7r+ F17 7r+Tr 7r +

r18 "rr+~ ~ + (non resonant)

F19 rr + ~ f r + ~ ~ + 1-20 /r +/1- /r + ~-0

1-21 ~,~r* 1-22 ~ ,.1. + ~0

F23 K + K -¢r+~r 0 (non-d,)

1-24 t/ any th i ng

(2.7±0.7) %

(1.3±0.6) % 2.1 x 10 - 3 90%

6 x 10 3 90%

(2.6 ± 0.8} %

(2.6±0.7) %

(3.2±1.1) % (6.7±2.9) x 10 -3

9 x 10 3 90%

3 % 4 % 90%

possibly seen

possibly seen

possibly seen

seen

(7.5±3.4) x 10 3

(1,2±0.4) % (7,8±3.2) x 10 3

< 8 × 10 - 3 90%

< 9 % 90%

< 1.3 % 90%

(6.4 :~ 3.4) %

< 6 % 90%

D + BRANCHING RATIOS

r (~,~+)/1-total r l / r VALUE ~ EVT5 DOCUMENT ID TECN COMMENT

0.027:±0.007 OUR AVERAGE <0.041 90 0 8 ADLER 90B MRK3 F.~ e = 4.14 GeV

0.02 ±0.01 405 9 CHEN 89 CLEO E~em = 10 GeV 0.033±0.016±0.010 9 9 BRAUNSCH... 87 TASS F-~em = 35-44 GeV

0.033±0.011 30 9 DERRICK 85B HRS Ece~ = 29 GeV

• • • We do not use the following data for averages, fits, limits, etc. • • •

seen 64 SHIPBAUGH 88 SPEC n N ~ Ds +any- I thing 0-800 GeV

100 ALBRECHT 85D ARG Eee= 10 GeV

0.13 ± 0 0 3 +0.04 9 007 49 ALTHOFF 84 TASS E~re n : 14-25 GeV

seen ARGUS 83 ARG Preliminary 0.044 104 9CHEN 83c CLEO F-.~em = 10.5 GeV

8ADLER 90 used a technique based on full reconstruction of D + D s pairs (double tags) I to obtain branching ratio limit without ~ ( D s ) assumptions. I

9Values based on crude estimate of D~ production level. ALTHOFF 84 errors have

additional negative error for Ds ± from primary B-meson. For DERRICK 858 the errors are statistical only.

r(d,~+~+~ )/r(d,~ +) r2/rl VALUE EVTS DOCUMENT ID TECN COMMENT 0.48±0.20 OUR AVERAGE Error includes scale factor of 1.4. 0 42-E0.13± 0.07 19 ANJOS 88 SILl Photoproduction 111±0.3710.28 62 ALBRECHT 85D ARG F~em = 10 GeV

r ( p ° ~ + ) / r ( ~ + ) r 3 / Q VALUE ~ DOCUMENT ID TEEN COMMENT

<0.08 90 ANJOS 89 TPS Photoproduction I • • • We do not use the following data for averages, fits, limits, etc. • • •

e e _ <0.22 90 ALBRECHT 8?G ARG E c m - 10 GeV

r ( K % + ) / r ( ~ +) r4/rx VALUE ~ DOCUMENT ID TECN COMMENT

<0.21 90 ADLER 89B MRK3 E~ e = 4.14 GeV I

r ( ~ ° K + ) / r ( ~ +) rs/r l VALUE DOCUMENT ID TEEN COMMENT 0.97±0.17 OUR AVERAGE 0 9 2 ± 0 . 3 2 ± 0 2 0 ADLER 89B MRK3 F.~e= 4.14 GeV I

1

0 99±0 17±010 CHEN 89 CLEO F.~ern = i0 GeV I 1

r ( ~ ' ( 8 9 2 ) ° K+ ) / r (d ,~ + ) Co/F1 VALUE EVT5 DOCUMENT ID TECN COMMENT 0.96±0.11 OUR AVERAGE 0 8 4 t 0 . 3 0 t 0 . 2 2 ADLER 89B MRK3 F..~em = 4.14 GeV

n

105±0.17±0.12 CHEN 89 CLEO F..~e= i0 GeV |

0.87±0.13±0.05 117 ANJOS 88 SILl Photoproduction 1.44i0.37 87 ALBRECHT 87F ARG E~em = 10 GeV

r ( K * ( 8 9 2 ) + R ° ) / r (d,Tr + ) r 7 / r l VALUE DOCUMENT ID TECN COMMENT

1.20±0.21+0.13 CHEN 89 CLEO E~e= 10 GeV I

r ( g + K - lr + (non-resonant))/r(¢~ +) Fe/F1 VALUE EVT5 DOCUMENT ID TECN COMMENT

0.25 :I: 0.07:1:0.05 48 ANJOS 88 SILl Photoproduction

r (g+g lr+lr-~r + (non-res.))/r(¢~ +) r9/rl VALUE ELSie EVT5 DOCUMENT ID TEEN COMMENT

<0.32 90 10 ANJOS 88 SILl PhotoproducBon

r (#+. ) / I - tota l rlotr VALUE EVT5 DOCUMENT ID TEEN COMMENT

<0.03 0 10 AUBERT 83 SPEC #+ Fe, 250 GeV

10AUBERT 83 obtain this limit assuming that Ds/- production rate is 20% of total charm production rate.

r ( , ~ + ) / r ( ~ a n y t h i n g ) m/r24 VALUE EVT5 DOCUMENT ID TEEN COMMENT possibly seen OUR EVALUATION • • • We do not use the following data for averages, fits, limits, etc. • • •

009±0.06 6 11 BRANDELIK 79 DASP Eceem= 4.42 GeV

11 Denominator is inconsistent with PARTRIDGE 81 (Crystal Ball).

r(rpP)/r(d,,~ +) q l / r l VALUE ~ EVT5 DOCUMENT ID TEEN COMMENT

<1.5 90 ANJOS 895 TPS Photoproduction • • • We do not use the following data for averages, fits, limits, etc. • • •

seen 12 WORMSER 88 MRK2 Eee= 29 GeV

17 ATKINSON 83 OMEG ~p 40 ASTON 81 OMEG "~p

12The 71~ + decay mode is observed with a branching ratio of about 3 times B(Ds ~ I ~ + ) .

r(~j~r +Tr + ~ - ) / F t o t a I r12/r VALUE EVT5 DOCUMENT ID TECN COMMENT possibly seen OUR EVALUATION • • • We do not use the following data for averages, fits, limits, etc. • • •

360 ASTON 81 OMEG -Yp

See key on page IV.1

VI1,129

Meson Full Listings D ~ , D s

r (n'(958)~r%r+ ~-)/rtotau r13/r VALUE EVT5 DOCUMENT ID TE~N COMMENT possibly seen OUR E V A L U A T I O N

• • • We do not use the following data for averages, fits. limits, etc. i • •

60 ASTON 81 OMEG ,-fp

r (@p+)/rtotai F14/r WALUE EVTS DOCUMENT ID TEEN COMMENT possibly seen OUR E V A L U A T I O N

• • • We do not use the fol lowing data for averages, fits, l imits, etc. i • •

83 A S T O N 81B OMEG ~fp

r(v'(958)~r+)/r(~ +) r ls/r l W~LUE DOCUMENT g D TECN COMMENT

seen 1 3 W O R M S E R 88 MRK2 F . ~ e = 2 9 G e V I

13The ~t%r+ decay mode is observed wi th a branching ratio of about 5 t imes B(Ds ~ I ~ + ) .

r(~ +lr- ~+)/r(¢~+) FIT/F1 VALUE DOCUMENT IO TEEN COMMENT

0 . 4 4 + 0 . 1 0 + 0 . 0 4 ANJOS 89 TPS Photoproduct ion

r(Tr+Tr-Tr + (non-resenant))/r(~Tr +) rzs/rz VALUE DOCUMENT ID TECN COMMENT

0 . 2 9 + 0 . 0 9 + 0 . 0 3 ANJOS 89 TPS Photoproduct ion

r ( f 0 ( 9 7 5 ) T r + ) I r ( ~ +) r l 01 r l V4LUE DOCUMENT ID TECN COMMENT

0.28±0.10:1:0.03 ANJOS 89 TPS Photoproduct ion

r (~+ ~- ~+ ~- ~+)/r (~+) r19/rl VdLUE ~ DOCUMENT ID TECN COMMENT

<0.29 90 ANJOS 89 TPS Photoproduct ion

r (~r+ ~ - ~+ 7r° ) / r (~ +) r2olrl V4LUE ~ DOCUMENT ID TECN COMMENT

<3.3 90 ANJOS 89E TPS Photoproduct ion

r ( ~ - + ) / r ( ¢ ~ r +) r21/r1 VALUE ~ DOCUMENT ID TEEN COMMENT

<0.5 90 ANJOS 89E TPS Photoproduct ion

r ( a = + = ° ) / r ( ~ + ) r22/r1 VALUE EVTS DOCUMENT ID TECN COMMENT

2.4=1=1.04-0.5 11 ANJOS 89E TPS Photoproduct ion

F ( K + K -'n'+'trO (non-@))/r(@Tr +) r 2 3 / r 1

VALUE ~ DOCUMENT ID TECN COMMENT

<2.4 90 14 ANJOS 895 TPS Photoproduct ion

14Total minus @ component.

REFERENCES FOR D~s

ADLER 90 ADLER 90B BARLAG 90C ADLER 89B ANJOS 89 ANJOS B9E AVERILL 89 CHEN 89 ALBRECHT 88 ALBRECHT 881 ANJOS 88 RAAB 88 SBIPBAUGH 88 WORMSER 88 ALBRECHT 87F ALBRECHT 87G ANJOS 87B BECKER 87B BLAYLOCK 87 BRAUNSCH... 87 CSORNA S7 JdNG 86 USHIDA 86 ALBRECHT 85D BERRICK 85B AIHARA 840 ALTHOFF 84 BAILEY ARGUS

Preliminary ATKINSON 83 AUBERT 88 CHEN 83B CHEN 83C USHIDA 83 ASTON 81 ASTON 81B PARTRIDGE 81 AMMAR 80 USHIDA 808 BRANDELIK 79 BRANDELIK

SLAC-PUB-5130 (PRL) +Blaylock, Bolton+ (Mark 81 Collab.) PRL 64 169 +Bai, Blaylock, Bolton+ (Mark III Collab.) ZPHY C (to be pub,) +Bucker, Boehringer, Bosman+ (ACCMOR Collab.) PRL 63 1211 +Bai, Becker, Blaylock, Boiton+ (Mark Ill Collab.) PRL 62 125 +Appel, Bean, Bracker+ (TPS Collab.) PL B223 267 +Apbel, Bean, Bracker+ (TPS Collab.) PR D39 123 +Blockus, Brabson+ (HRS Collab.) PL B226 192 +Mcllwain. Miller. Ng, Shibata+ (GLEe Collab.) PL B207 349 +Binder, 8oeckrnann+ (ARGUS Collab.) PL B210 267 +Boeckmann, Glaeser+ (ARGUS Collab.) PRL 60 897 +Appel+ (TaBged Photon Spectrometer Gollab.) PR D37 2391 +Anjos, Appe{, 8racker+ (FNAL TPS Collab ) PRL 60 2117 *Wiss, Binkley+ (E 400 Collab.) PRL 61 1057 +Abrams, AmiOei, Baden+ (Mark II Collab.) PL B179 398 +Binder, Boeckmann. Glaeser+ (ARGUS Collab.) PL B195 102 *Andam, Binder, Boeckmann+ (ARGUS £ollab,) PRL 58 1818 cAppel, Bracker, Browder~ (FNAL TPS Collab.) PL B184 277 +BoehrinBeL Bosman+ (NA11 and NA32 Collab.) PRL 58 2171 +Bolton. Brown, Bunnell÷ (Mark III Collab ) ZPHY C35 317 Braunschw~i 8, Gerhards+ (TASSO Collab,) PL B191 318 +Mestayer, Panvini, Word+ (CLEO Collab.) PRL 56 1775 ~Abachi+ (HRS Collab.} PRL 56 1767 ÷Kondo+ (AICH, FNAL, GIFU, GYEO. KOBE, SEOU+) PL 153B 343 +Drescher, Binder. Drews+ (ARGUS Colla6.) PRL 54 2 5 6 8 +Fernandez, Fries, Hyman+ (HRS Collab.) PRL 83 2465 +Alston Gamjost. Badtke, Bakken+ (TPC Collab.) PL 136B 130 +BraunschweiB, Kirschfink+ {TASSO Coilab.) PL 139B 320 ~Belau, BohrinBer, Bosman+ (ACCMOR Collab.) CERN Cour. 23 423 (ARGUS Collab)

ZPHY C17 1 + (BONN, £ERN, GLAS. LANE, MCHS, LPNP, RL+) NP B213 3[ +Bassompierre. Becks, Best+ (EMC £ollab.) PR D28 2304 +Fenker* (ARIZ, FNAL, FLOR, NDAM, TUFT+) PRL 52 634 +Alam, Giles, KaBan+ (CLEO Collab.) PRL 51 2362 + (AICH, ENAL, KOBE. SEOU, MCGI. NAGO+) PL 100B 91 + (BONN, CERN, EPOL, GLAS, LANC, MCHS+) NP B189 205 + (BONN, CERN, EPOL, GLAS. LANC, MCHS+) PRL 47 760 +Peck, Porter, Gu+ (Crystal Ball Gollab.) PL 94B 118 + (KANS, FNAL, SERP, ITEP, CRAG, JINR, WASH+) PRL 45 1053 + (AICH, FNAL KOBE, SEOU, MCGI, NAGO, OSU+) PL 80B 412 +BraunschweiB, Martyn, Sander+ (DASP Collab.)

77B PL 70B 132 +BraunschweiB. Martyn, Sander+ (DASP Collab)

- - OTHER RELATED PAPERS - -

SCHINDLER 88 HiBb Energy Electron-Positron Physics 234 Editors: A. All and P. Soedin 8, World Sdentific, SinBapore

GRAB 87 SLAG-PUB-4372 EPS Conference Uppsala

SCHUBERT 87 IHEP HD/87 7 EPS Conference - Uppsala, Prec., Voh 2, p. 791

SNYDER 87 IUHEEE-B7 11 Syrup. on Prod. and Decay of Heavy Flavors, Stanford

SCHINDLER 86 SLAC-PUB-4136 World Press International

SCHINDLER 86B SLAC PUB 4,248 SLAC Summer institute

TRILLING 81 PRPL 75 57

I(J P) = ?(??)

(SLAC)

(SLAC)

(HEID)

(INDI

(SLAG)

(SLAC)

(LBL UCB)

D; MASS

The fit includes the D4-, D 0, D~, and D; ± masses arid the D O - D ± , D~ - D ±, and D ; ± - D ~ mass differences.

VALUE (MeV~ DOCUMENT I D TEEN COMMENT

2110.3=t=2.0 OUR F IT Error includes scale factor o f 1,3. 2106.6+2.1=t=2.7 1 BLAYLOCK 87 MRK3 e + e ~ Ds X

1Assuming Ds mass = 1968.7 ± 0,9 MeV.

D; - Ds MASS DIFFERENCE

VALUE (MeV I EVTS DOCUMENT ID TEEN COMMENT

141.5=1:1.9 OUR FIT Error includes scale factor of 1.3. 1 4 2 . 4 i 1.7 OUR AVERAGE 142.5± 0.84-1.5 2 A L B R E C H T 88 ARG e + e - ~ DS~ 143,0±18.0 8 A S R A T Y A N 85 HLBC FNAL 15-ft, u -2 H

139 .5± 8 .3±9 .7 60 A I H A R A 84D TPC e + e - ~ hadrons 110 4-46 BRANDEL IK 79 DASP e + e - ~ D s ?

2 Result includes data of A L B R E C H T 84B

D~ WIDTH

VALUE (MeV) CL% DOCUMENT ID TEEN COMMENT

< 4.5 90 A L B R E C H T 88 ARG E~em = 10.2 GeV

• • • We do not use the fol lowing data for averages, fits, l imits, etc. • • •

<22 90 BLAYLOCK 8? MRK3 e + e - ~ Ds X

D.~ DECAY MODES

D~ modes are charge conjugates of the modes below,

Mode Fraction ( F i / F )

F1 Ds? dominant

D~ BRANCHING RATIOS

F(Ds~')/Ftotal VALUE DOCUMENT ID TECN COMMENT dominant OUR EVALUATION • • • We do not use the fol lowing data for averages, fits, l imits, etc. • • •

seen A L B R E C H T 88 ARG e + e - ~ Ds

seen A S R A T Y A N 85 seen A I H A R A 84D seen A L B R E C H T 84B seen BRANDELIK 79

r l / r

D; REFERENCES

ALBRECHT 88 PL B207 349 +Binder, Boeckmann+ (ARGUS Coltab ) BLAYLOCK 87 PRL 58 2171 +Bolton, Br~n, Bunuell+ (Mark III Collab.) ASRATYAN 85 PL 156B 441 +Fedotov, Ammosov, Burtovoy+ (ITEP, SERP) AIHARA 84D PRL 53 2465 +Alston Garnjost, Badtke, Bakken+ (TPC Collab.) ALBRECHT 84B PL 146B 111 +Drescher, Huller+ (ARGUS Collab.) BRANDELIK 79 PL 80B 412 +Braunschwei 8, Martyn, Sander+ (DASP Collab.)

- - OTHER RELATED PAPERS - -

BRANDELIK 78C PL 76B 361 +Cords+ (AACH, DESY, HAMB, MPIM, TOKY) BRANDELIK 77B PL 708 132 +Braunschweig, Martyn, Sander+ (DASP Eollab.)

V11.130

Meson Full Listings Ds1(2536) ±, D~j(2564) ±, Bottom Mesons

I(J P) = 0(1 +) /, J, P need confirmation,

Seen in D*(2010)+K O. Not seen in D + K O. JP = 1 ± assignment strongly favored.

Ds1(2536) ± MASS

VALUE (MeV~ DOCUMENT ID TECN COMMENT

2536.5=t= 0.8 OUR AVERAGE

2536.6± 0.7±0.4 AVERY 90 CLEO e + e ~ D * + K 0 X

2535.9± 0 .9±20 ALBRECHT 89E ARG Dsl ~ D*(2OIO)K O

2535 ±28 1 ASRATYAN 88 HLBC u N ~ Ds~,? X

1 Not seen in D* K.

Ds1(2536) :t: - D~(2111) MASS DIFFERENCE

VALUE (MeV] DOCUMENT ID TECN COMMENT

424±28 ASRATYAN 88 HLBC D~ ~,

Ds1(2536) ± WIDTH

VALUE (MeV) CL~/o DOCUMENT 10

<5.44 90 AVERY <4.6 90 ALBRECHT

TECN COMMENT

90 CLEO e + e ~ D * + K 0 X I 895 ARG O;1 ~ D*(2010)K 0 I

Ds1(2536) + DECAY MODES

Ds1(2536 ) modes are charge conjugates of the modes below.

Mode Fraction ( r i / r )

F1 D*(2010) + K 0 seem F 2 D + K 0 r 3 D; "~ possibly seen

Ds1(2536) + BRANCHING RATIOS

F(D + K°)/r(D*(2010) + K O) r 2 / Q VALUE CL% DOCUMENT ID TECN COMMENT

<0.43 90 ALBRECHT 89E ARG ~ 1 Z D* (2010 IK 0

r(D;-y)/rtota, rs/r VALUE DOCUMENT ID TECN COMMENT

possibly seen ASRATYAN 88 HLBC ~, N - Ds~ ) X

Ds1(2536) ± REFERENCES

AVERY 90 PR D41 774 . Besson (CLEO Collab ) ALBRECHT 89E PL B230 162 +GlaseL Harder. (ARGUS Collab) ASRATYAN 88 ZPHY C40 483 +Fedotov+ ([TEP. SERP)

I D-J(2564)± I "J") =

OMITTED FROM SUMMARY TABLE

DBj(2564) ± MASS

VALUE (MeV~ DOCUMENT ID TEEN COMMENT

2564.3±4.4 ASRATYAN 88 HLBC D* K

Ds./(2564) ± WIDTH

VALUE (MeV~ DOCUMENT ID TECN COMMENT

<2.5 ASRATYAN 88 HLBC D* K

DBj(2564) + DECAY MODES

D~j(2564) modes are charge conjugates of the modes below.

Mode Fraction (I- i /F)

g I D* K seen

DBj(2564) + BRANCHING RATIOS

F (D* K)/rtota I VALUE DOCUMENT IO TECN COMMENT

rffr

seen ASRATYAN 88 HLBC D* K

D~j(2564) ± REFERENCES

ASRATYAN 88 ZPHY C40 483 ÷Feootov- ()TEP sERe)

BOTTOM MESONS (B = -I-1)

B + = ub, B ° = d b , ~ ° = d b , B - = B b ,

similarly for B* 's

H I G H L I G H T S O F B M E S O N P H Y S I C S

(by R.H. Schindler. SLAC)

Tile results obtained since our last edition are based largely

oil samples of B decays fl'om ARGUS and CLEO taken at the

Y(4S), the Y(SS), and in the nearby cont inuum, and represent

an approximate doubling of da ta over tha t available in our last

edition. The data samples reported amount to 0.2 0.4 fl~-l.

In 1990 the new CLEO-II detector s tar ted taking da ta at the

CESR ring. CESR itself is approved for major upgrades, and

thus we ]nay anticipate significantly larger samples (1 10 fl~ 1 )

over the next few years, resulting in marked improvements in

all the areas discussed below.

Since our last edition, the discrepancy between ARGUS

and CLEO on the open (D~ D~) and closed (~'~) charm content

of B decays has largely been resolved, with both experiments

obtaining for the average number of c-quarks per B decay the

value 1.0 + 0.1 (Ref. 1) under the same assumpt ions for D,, A,.,

and ~, inelusive branching ratios. This is about one s tandard

deviation less than the predicted value of 1.15 e-quarks per /:/

decay. While the so-ealled chaTwz deficit has largely vanished,

the small remaining discrepancy leaves open the possibilities:

(a) that the assmned charmed branching ratios are too large,

(b) tha t the umnber of B mesons in the Y(4S) normalization

is too high, or (c) both.

For the ~')(3770), hadronic (e.g., w(3770) ~ J/~,TrTr) and

eleetromagnetic transi t ions have been identified? and some

evidence exists for direct ~)(3770) decays to light mesons. 3

For the Y(4S), CLEO previously set model-dependent limits

on n o n - B B deeays, and now, with more data. has observed

such events. ~ The evidence takes the form of Y(4S) decays

to J/'~', which are a) beyond the kinematic limi~ for decays

via B B and b) beyond the rate expected fl'om the continuul:n

under the T(4S). While the measured branching fraction

is small (about 0 .2~) , this is for a limited kinematic range

(:r.l/c _> 0.38) and for only one specific meson. The mechanism

for this OZI forbidden process is unknown. It may be due to

a eomplieated hadronic rescattering effect, or to the admixture

of bbg and bt) s tates at the Y(4S), or perhaps even to the

production of new four-quark s tates near the B B threshold.

As in the case of the evidence from u(3770) decays, the large