Search for a scalar bottom quark with mass 3.5-GeV/c**2 to 4.5-GeV/c**2.

The CLEO collaboration Savinov, V. ; Coan, T.E. ; Fadeyev, V. ; et al.
Phys.Rev.D 63 (2001) 051101, 2001.
Inspire Record 535290 DOI 10.17182/hepdata.47285

We report on a search for a supersymmetric $\tilde{B}$ meson with mass between 3.5 and 4.5 GeV/$c^2$ using 4.52 ${\rm fb}^{-1}$ of integrated luminosity produced at $\sqrt{s}=10.52$ GeV, just below the $e^+e^-\to B\bar{B}$ threshold, and collected with the CLEO detector. We find no evidence for a light scalar bottom quark.

1 data table match query

Supersymmetric B-quark transits into B~ meson, which decays into charmed meson D and lepton, or pion, or sneutrino.


Bounds on the CP asymmetry in like sign dileptons from B0 anti-B0 meson decays

The CLEO collaboration Jaffe, D.E. ; Mahapatra, R. ; Masek, G. ; et al.
Phys.Rev.Lett. 86 (2001) 5000-5003, 2001.
Inspire Record 551926 DOI 10.17182/hepdata.47284

We have measured the charge asymmetry in like-sign dilepton yields from B^0 B^0-bar meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a_ll = [N(l+l+) - N(l-l-)]/[N(l+l+) + N[l-l-)] = +0.013 +/- 0.050 +/- 0.005 . We combine this result with a previous, independent measurement and obtain Re(epsilon_B)/(1+|epsilon_B|^2) = +0.0035 +/- 0.0103 +/- 0.0015 (uncertainties are statistical and systematic, respectively) for the CP impurity parameter, epsilon_B.

1 data table match query

CONST(NAME=EPSILON) is CP impurity parameter.


Observation of the Omega/c0 charmed baryon at CLEO.

The CLEO collaboration Cronin-Hennessy, D. ; Lyon, A.L. ; Thorndike, E.H. ; et al.
Phys.Rev.Lett. 86 (2001) 3730-3734, 2001.
Inspire Record 535112 DOI 10.17182/hepdata.47286

The CLEO experiment at the CESR collider has used 13.7 fb$^{-1}$ of data to search for the production of the $\Omega_c^0$ (css-ground state) in $e^{+}e^{-}$ collisions at $\sqrt{s} \simeq 10.6$ {\rm GeV}. The modes used to study the $\Omega_c^0$ are $\Omega^- \pi^+$, $\Omega^- \pi^+ \pi^0$, $\Xi^- K^- pi^+ \pi^+$, $\Xi^0 K^- pi^+$, and $\Omega^- \pi^+ \pi^- \pi^+$. We observe a signal of 40.4$\pm$9.0(stat) events at a mass of 2694.6$\pm$2.6(stat)$\pm$1.9(syst) {\rm MeV/$c^2$}, for all modes combined.

1 data table match query

Cross section times branching ratio.


Correlated Lambda/c+ anti-Lambda/c- production in e+ e- annihilations at s**(1/2) approx. 10.5-GeV.

The CLEO collaboration Bornheim, A. ; Lipeles, Elliot David ; Pappas, S.P. ; et al.
Phys.Rev.D 63 (2001) 112003, 2001.
Inspire Record 552541 DOI 10.17182/hepdata.47283

Using 13.6/fb of continuum two-jet e+e- -> ccbar events collected with the CLEO detector, we have searched for baryon number correlations at the primary quark level. We have measured the likelihood for a /\c+ charmed baryon to be produced in the hemisphere opposite a /\c- relative to the likelihood for a /\c+ charmed baryon to be produced opposite an anticharmed meson Dbar; in all cases, the reconstructed hadrons must have momentum greater than 2.3 GeV/c. We find that, given a /\c- (reconstructed in five different decay modes), a /\c+ is observed in the opposite hemisphere (0.72+/-0.11)% of the time (not corrected for efficiency). By contrast, given a Dbar in one hemisphere, a /\c+ is observed in the opposite hemisphere only (0.21+/-0.02)% of the time. Normalized to the total number of either /\c- or Dbar ``tags'', it is therefore 3.52+/-0.45+/-0.42 times more likely to find a /\c+ opposite a /\c- than a Dbar meson. This enhancement is not observed in the JETSET 7.3 e+e- -> ccbar Monte Carlo simulation.

4 data tables match query

Statistal errors only.

Statistal errors only.

Statistal errors only.

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Observation of two excited charmed baryons decaying into Lambda/c+ pi+-.

The CLEO collaboration Brandenburg, G. ; Briere, Roy A. ; Kim, D.Y.J. ; et al.
Phys.Rev.Lett. 78 (1997) 2304-2308, 1997.
Inspire Record 424575 DOI 10.17182/hepdata.47250

Using data recorded by the CLEO-II detector at CESR, we report evidence of a pair of excited charmed baryons, one decaying into Λc+π+ and the other into Λc+π−. The doubly charged state has a measured mass difference M(Λc+π+)−M(Λc+) of 234.5±1.1±0.8 MeV/c2 and a width of 17.9−3.2+3.8±4.0MeV/c2, and the neutral state has a measured mass difference M(Λc+π−)−M(Λc+) of 232.6±1.0±0.8 MeV/c2 and a width of 13.0−3.0+3.7±4.0MeV/c2. We interpret these data as evidence of the Σc*++ and Σc*0, the spin 32+ excitations of the Σc baryons.

1 data table match query

CONST(NAME=EPS) is the parameter of the Peterson fragmentation function (C.Peterson et al., PR D27, 105 (1983)) D(N)/D(Z) = FD(Z) = const * (1/Z)*1/(1- (1/Z)-CONST(NAME=EPS)/(1-Z))**2.


First observation of the Sigma/c*+ baryon and a new measurement of the Sigma/c+ mass.

The CLEO collaboration Ammar, R. ; Bean, A. ; Besson, D. ; et al.
Phys.Rev.Lett. 86 (2001) 1167-1170, 2001.
Inspire Record 530545 DOI 10.17182/hepdata.47310

Using data recorded with the CLEO II and CLEO II.V detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the $\Sigma_c^{*+}$ charmed baryon, and an updated measurement of the mass of the $\Sigma_c^+$ baryon. We find $M(\Sigma_c^{*+})-M(\Lambda_c^+)$= 231.0 +- 1.1 +- 2.0 MeV, and $M(\Sigma_c^{+})-M(\Lambda_c^+)$= 166.4 +- 0.2 +- 0.3 MeV, where the errors are statistical and systematic respectively.

1 data table match query

No description provided.


Measurement of the direct photon spectrum in Upsilon(1S) decays.

The CLEO collaboration Nemati, B. ; Richichi, S.J. ; Ross, W.R. ; et al.
Phys.Rev.D 55 (1997) 5273-5281, 1997.
Inspire Record 425927 DOI 10.17182/hepdata.52340

Using data taken with the CLEO II detector at the Cornell Electron Storage Ring, we have determined the ratio of branching fractions: $R_{\gamma} \equiv \Gamma(\Upsilon(1S) \rightarrow \gamma gg)/\Gamma(\Upsilon(1S) \rightarrow ggg) = (2.75 \pm 0.04(stat.) \pm 0.15(syst.))%$. From this ratio, we have determined the QCD scale parameter $\Lambda_{\overline{MS}}$ (defined in the modified minimal subtraction scheme) to be $\Lambda_{\overline{MS}}= 233 \pm 11 \pm 59$ MeV, from which we determine a value for the strong coupling constant $\alpha_{s}(M_{\Upsilon(1S)}) = 0.163 \pm 0.002 \pm 0.014$, or $\alpha_{s}(M_{Z}) = 0.110 \pm 0.001 \pm 0.007$.

1 data table match query

The ALPHAS at MZ is extrapolation from M(UPSI).


Studies of the Cabibbo-suppressed decays D+ --> pi0 l+ nu and D+ --> eta e+ nu/e.

The CLEO collaboration Bartelt, John E. ; Csorna, S.E. ; Jain, V. ; et al.
Phys.Lett.B 405 (1997) 373-378, 1997.
Inspire Record 441553 DOI 10.17182/hepdata.47235

Using 4.8 fb$~{-1}$ of data taken with the CLEO II detector, the branching fraction for the Cabibbo-suppressed decay $D~+\to\pi~0\ell~+\nu$ measured relative to the Cabibbo favored decay $D~+\to\bar{K~0}\ell~+\nu$ is found to be $0.046\pm 0.014\pm 0.017$. Using $V_{cs}$ and $V_{cd}$ from unitarity constraints, we determine $| f_+~{\pi}(0)/f_+~K(0)|~2=0.9\pm 0.3\pm 0.3$ We also present a 90% confidence level upper limit for the branching ratio of the decay $D~+ \to \eta e~+\nu_e$ relative to that for $D~+ \to \pi~0 e~+\nu_e$ of 1.5.

1 data table match query

Formfactors for the D+ (D-) decay into pseudoscalar P. Charge conjugate states are implied. LEPTON+ means E+ or MU+. VCD and VCS are the elements of the CKM matrix (See R.M.Barnett et al (PDG), PR D54, 1 (1996)).


Continuum charged D* spin alignment at s**(1/2) = 10.5-GeV.

The CLEO collaboration Brandenburg, G. ; Briere, Roy A. ; Ershov, A. ; et al.
Phys.Rev.D 58 (1998) 052003, 1998.
Inspire Record 467595 DOI 10.17182/hepdata.47207

A measurement of the spin alignment of charged D^* mesons produced in continuum e^+ e^- \to c \bar{c} events at \sqrt{s}=10.5 GeV is presented. This study using 4.72 fb^{-1} of CLEO II data shows that there is little evidence of any D^* spin alignment.

4 data tables match query

Systematic errors are not given.

Systematic errors are not given.

Two decay modes of D0 --> K- PI+ and D0 --> K- PI+ PI0 are combined.

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Study of gluon versus quark fragmentation in Upsilon --> g g gamma and e+ e- --> q anti-q gamma events at s**(1/2) = 10-GeV.

The CLEO collaboration Alam, M.S. ; Athar, S.B. ; Ling, Z. ; et al.
Phys.Rev.D 56 (1997) 17-22, 1997.
Inspire Record 439530 DOI 10.17182/hepdata.47233

Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we determine the ratio R(chrg) for the mean charged multiplicity observed in Upsilon(1S)->gggamma events, to the mean charged multiplicity observed in e+e- -> qqbar gamma events. We find R(chrg)=1.04+/-0.02+/-0.05 for jet-jet masses less than 7 GeV.

1 data table match query

No description provided.