BABAR Publications

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PLOT-0043 Production of pi+-, K+- and p/pbar at sqrt(s) = 10.54 GeV and in Hadronic Y(4s) Decays

Doc Type

Public Plots or Figures

Record Created

July 6, 2003

Comments

Public plots and figures presented at European Physical Society Meeting, 2003

Abstract

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We present measurements of inclusive charged pion, kaon, and proton production
cross sections and fractions in e+e- collisions from the 
BABAR experiment, both on and below the Upsilon(4S) resonance.  
The DCH and DIRC are
used to identify clean samples of charged pions, kaons, and protons
over a wide range of momenta and polar angle in the laboratory frame, 
corresponding to 
nearly complete momentum coverage in the e+e- center-of-mass
system.  The continuum data, below the Upsilon(4S) resonance, precisely
test perturbative QCD calculations and fragmentation models.  The
precision is comparable to that of existing measurements at the
Z0 resonance.  The data at the Upsilon(4S) resonance provide, after
continuum subtraction, a direct probe of the inclusive properties of
hadronic B meson decays.

Revisions and Files

1 revised July 6, 2003

File Date Thumbnails	File Name	File Type	File Format	File Size (Kb)	Comments
14-JUL-2003	abstract.txt	Abstract	txt	0.79	Abstract of BAD610.
14-JUL-2003	efficiency.eps	Figure or plot	eps	51.59	Momentum-dependent identification efficiencies in the polar angle bin cos(theta)=0.77...0.88. Bands indicate the uncertainties derived from the calibration procedure using samples of well identified hadrons from K0s, Lambda, D*.
14-JUL-2003	frax-cont-mc.eps	Figure or plot	eps	38.31	Pion (circles), kaon (squares) and proton (diamonds) fractions in the continuum data compared with the predictions of three fragmentation models.
14-JUL-2003	frax-cont.eps	Figure or plot	eps	32.12	Pion (circles), kaon (squares) and proton (diamonds) fractions in the continuum data, as a function of momentum in the center of mass. The gray bands indicate the systematic errors common to all points.
14-JUL-2003	frax-ups-mc.eps	Figure or plot	eps	28.12	Fractions on the Upsilon(4S) (symbols) compared with EVTGEN, the BABAR generic BBbar model (lines).
14-JUL-2003	frax-ups.eps	Figure or plot	eps	43.29	Fractions on the Upsilon(4S) (solid symbols) compared with those derived from a previous ARGUS publication (open symbols).
14-JUL-2003	xsect-cont-comp-data.eps	Figure or plot	eps	44.84	Differential pion (top), kaon (middle) and proton (bottom) cross section from the continuum data (solid circles) as a function of scaled momentum, compared with results at different c.m. energies.
14-JUL-2003	xsect-cont-comp-mc.eps	Figure or plot	eps	51.43	Differential cross sections in the continuum data (solid symbols) compared with the predictions of a number of fragmentation models (lines).
14-JUL-2003	xsect-cont-ups.eps	Figure or plot	eps	85.33	Differential production cross sections for pions (circles), kaons (squares) and protons (diamonds) as a function of c.m. momentum. Results for the continuum data are shown as filled symbols; those from the Upsilon(4S) as open symbols.
14-JUL-2003	xsect-cont-xi-comp-mc.eps	Figure or plot	eps	44.21	Differential cross sections in the continuum data (solid symbols) as a function of xi=-ln(2*p/E_cm) compared with the predictions of three fragmentation models (lines).
14-JUL-2003	xsect-cont-xi-fits.eps	Figure or plot	eps	28.01	Differential cross sections in the continuum data (solid symbols) as a function of xi=-ln(2*p/E_cm) shown with the results of fits of Gaussian functions (solid lines) and distorted Gaussian functions (G++, dashed lines).
14-JUL-2003	xsect-jetset-ecm.eps	Figure or plot	eps	32.58	Differential cross sections in JETSET7.4 at different c.m. energies.
14-JUL-2003	xsect-ups-comp-data.eps	Figure or plot	eps	37.17	Differential cross sections on the Upsilon(4S) (solid circles) compared with previous results from ARGUS and CLEO. Also shown on the charged pion (kaon) plot are neutral pions (kaon) results from BELLE (ARGUS).
14-JUL-2003	xsect-ups-comp-mc.eps	Figure or plot	eps	31.21	Differential cross sections on the Upsilon(4S) (solid symbols) compared with the predictions of EVTGEN, the BABAR generic BBbar model (lines).
14-JUL-2003	xsect-ups-xi-comp-mc.eps	Figure or plot	eps	39.35	Differential cross sections on the Upsilon(4S) (solid symbols) as a function of xi=-ln(2*p/E_cm) compared with the prediction of EVTGEN and the result of the fit of a distorted Gaussian (G+, dashed lines).
14-JUL-2003	xsect-ups-xi-fits.eps	Figure or plot	eps	31.14	Differential cross sections on the Upsilon(4S) (solid symbols) as a function of xi=-ln(2*p/E_cm) shown with the results of fits of Gaussian functions (solid lines) and distorted Gaussian functions (G++, dashed lines).

Submitted To	2003 International Europhysics Conference on High Energy Physics