Study of the Charge Exchange Reactions $\pi^- p \to (\pi^0$, $\eta$, $\eta^\prime$) $n$ at 63-{GeV}

The ACCMOR collaboration Daum, C. ; Hertzberger, L. ; Hoogland, W. ; et al.
Z.Phys. C8 (1981) 95, 1981.
Inspire Record 156266 DOI 10.17182/hepdata.49658
4 data tables

INCLUDING SYSTEMATIC ERRORS.

STATISTICAL ERRORS ONLY.

STATISTICAL ERRORS ONLY.

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Diffractive Production of Strange Mesons at 63-{GeV}

The ACCMOR collaboration Daum, C. ; Hertzberger, L. ; Hoogland, W. ; et al.
Nucl.Phys. B187 (1981) 1-41, 1981.
Inspire Record 164180 DOI 10.17182/hepdata.34277
1 data table

JP=1+ S-WAVE PARTIAL WAVE INTENSITIES AND TOTAL INTENSITY FOR Q-REGION. THE <K* PI> INTENSITY IS DOMINATED BY QHIGH. THE <K RHO> AND <KAPPA PI> INTENSITIES ARE DOMINATED BY QLOW.


Inclusive $\phi$ Meson Production in 93-{GeV} and 63-{GeV} Hadron Interaction

The ACCMOR collaboration Daum, C. ; Hertzberger, L. ; Hoogland, W. ; et al.
Nucl.Phys. B186 (1981) 205-218, 1981.
Inspire Record 10281 DOI 10.17182/hepdata.7855

The inclusive reactions h+p→ φ +X, (h= π ±, ,K ± ,p ± ), are studied for 0⪅ x F ⪅0.3 and p ⊥ ⩽ 1 GeV at 93 and and 63 GeV incident momentum. Differential cross sections d σ /d p ⊥ 2 and dσ /d x F are presented and are compared with predictions of the naive parton model.

4 data tables

No description provided.

No description provided.

No description provided.

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EVIDENCE FOR A NONTENSOR (Q ANTI-Q) MESON AT 1410-MEV PRODUCED IN THE REACTION PI- P ---> K0(S) K0(S) N AT 63-GEV

The ACCMOR collaboration Daum, C. ; Hertzberger, L.O. ; Hoogland, W. ; et al.
Z.Phys. C23 (1984) 339-347, 1984.
Inspire Record 204305 DOI 10.17182/hepdata.16225
1 data table

No description provided.


Forward Particle Production in $\pi^- p$ and $K^- p$ Collisions at 58-{GeV}/$c$ and Comparison With Quark Models

The ACCMOR collaboration Pauss, F. ; Gonzalez-Arroyo, Antonio ; Ochs, W. ; et al.
Z.Phys. C27 (1985) 211, 1985.
Inspire Record 206988 DOI 10.17182/hepdata.16120
3 data tables

ERRORS INCLUDE SYSTEMATIC ERRORS BUT NOT OVERALL NORMALISATION UNCERTAINTY OF 8PCT.

ERRORS INCLUDE SYSTEMATIC ERRORS BUT NOT OVERALL NORMALISATION UNCERTAINTY OF 8PCT.

ERRORS INCLUDE SYSTEMATIC ERRORS BUT NOT OVERALL NORMALISATION UNCERTAINTY OF 8PCT.


Measurement of the Cross Section for open b-Quark Production in Two-Photon Interactions at LEP

The ALEPH collaboration Schael, S. ; Barate, R. ; Bruneliere, R. ; et al.
JHEP 0709 (2007) 102, 2007.
Inspire Record 753710 DOI 10.17182/hepdata.48802

Inclusive beauty-quark production in two-photon collisions has been measured at LEP using an integrated luminosity of 698 pb-1 collected by the ALEPH detector with sqrt(s) between 130 and 209 GeV. The b quarks were identified using lifetime information. The cross section is found to be sigma(e+ e- --> e+ e- b \bar{b} X) = (5.4 +/- 0.8 (stat) +/- 0.8 (syst)) pb which is consistent with Next-to-Leading Order QCD.

1 data table

Cross section for the process E+ E- --> E+ E- BQUARK BQUARKBAR X.


Measurement of W-pair production in e+ e- collisions at centre-of-mass energies from 183-GeV to 209-GeV

The ALEPH collaboration Heister, A. ; Schael, S. ; Barate, R. ; et al.
Eur.Phys.J. C38 (2004) 147-160, 2004.
Inspire Record 653296 DOI 10.17182/hepdata.48582
13 data tables

The measured cross section for the E NU E NU final state. The DSYS error is the typical systematic error.

The measured cross section for the E NU MU NU final state. The DSYS error is the typical systematic error.

The measured cross section for the E NU TAU NU final state. The DSYS error is the typical systematic error.

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Single vector boson production in e+ e- collisions at centre-of-mass energies from 183-GeV to 209-GeV

The ALEPH collaboration Schael, S. ; Barate, R. ; Bruneliere, R. ; et al.
Phys.Lett. B605 (2005) 49-62, 2005.
Inspire Record 656811 DOI 10.17182/hepdata.48763
4 data tables

Measured cross sections for single W production in the leptonic and hadronic decay channels of the W separately and combined.

The measured single Z0 production cross section.

Z0 --> MU+ MU- cross section averaged over all c.m. energies.

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Study of the fragmentation of b quarks into B mesons at the Z peak

The ALEPH collaboration Heister, A. ; Schael, S. ; Barate, R. ; et al.
Phys.Lett. B512 (2001) 30-48, 2001.
Inspire Record 558327 DOI 10.17182/hepdata.48926

The fragmentation of b quarks into B mesons is studied with four million hadronic Z decays collected by the ALEPH experiment during the years 1991-1995. A semi-exclusive reconstruction of B->l nu D(*) decays is performed, by combining lepton candidates with fully reconstructed D(*) mesons while the neutrino energy is estimated from the missing energy of the event. The mean value of xewd, the energy of the weakly-decaying B meson normalised to the beam energy, is found to be mxewd = 0.716 +- 0.006 (stat) +- 0.006 (syst) using a model-independent method; the corresponding value for the energy of the leading B meson is mxel = 0.736 +- 0.006 (stat) +- 0.006 (syst). The reconstructed spectra are compared with different fragmentation models.

6 data tables

Normalized binned spectra for weakly-decaying (WD) leading (L) B-mesons.

The extracted spectra spectra for weakly-decaying (WD) leading (L) B-mesons.

Statistical error matrix for the Weakly Decaying distribution in units of 10**-6.

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Single photon and multiphoton production in $e^{+} e^{-}$ collisions at a center-of-mass energy of 183-GeV

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Phys.Lett. B429 (1998) 201-214, 1998.
Inspire Record 470677 DOI 10.17182/hepdata.49502
2 data tables

No description provided.

No description provided.


Study of charm production in Z decays

The ALEPH collaboration Barate, R. ; Decamp, D. ; Ghez, Philippe ; et al.
Eur.Phys.J. C16 (2000) 597-611, 2000.
Inspire Record 507422 DOI 10.17182/hepdata.49183

The production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D*+ is found to be f(c to D*+) = 0.233 +- 0.010 (stat.) +- 0.011 (syst.). The average fraction of the beam energy carried by D*+- mesons in Z to cc events is measured to be < X_E (D*+-) >_cc = 0.4878 +- 0.0046 (stat.) +- 0.0061 (syst.). The D*+- energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a cc pair: n_{gluon to cc} = (3.23 +- 0.48 (stat.) +- 0.53 (syst.) %. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P_V = 0.595 +- 0.045. The fractional decay width of the Z into cc pairs is determined from the sum of the production rates for various weakly decaying charmed states to be Rc = 0.1738 +- 0.0047 (stat.) +- 0.0116 (syst.).

3 data tables

The differential D*+- production rate. Statistical errors only.

The multiplicity of D*+- events using a MC shape to do the very small extrapolation over the entire X range.

Fraction of hadronic Z0 decays into charm quark pairs summing all the contributions of the fundamental charmed states and including a contribution from baryons not decaying to LAMBDA/C+. The second DSYS error is due to the uncertainty in the branching ratio.


Measurement of the fraction of hadronic Z decays into charm quark pairs

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Eur.Phys.J. C4 (1998) 557-570, 1998.
Inspire Record 468852 DOI 10.17182/hepdata.49530
1 data table

No description provided.


Measurement of the e+ e- ---> Z Z production cross-section at center-of-mass energies of 183-GeV and 189-GeV

The ALEPH collaboration Barate, R. ; Decamp, D. ; Ghez, Philippe ; et al.
Phys.Lett. B469 (1999) 287-302, 1999.
Inspire Record 509241 DOI 10.17182/hepdata.49034

The ee -> ZZ cross section at sqrt(s)=182.7 and 188.6 GeV has been measured using the ALEPH detector. The analysis covers all of the visible ZZ final states and yields cross section measurements of sigma_ZZ(182.7 GeV) = 0.11 +- (0.16,0.11) (stat.) +- 0.04 (syst.) pb and sigma_ZZ(188.6 GeV) = 0.67 +- 0.13 (stat.) +- 0.04 (syst.) pb consistent with the Standard Model expectations.

1 data table

The combined cross sections for the 2Z0 (NC2) fixed state.


Measurements of the structure of quark and gluon jets in hadronic Z decays

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Eur.Phys.J. C17 (2000) 1-18, 2000.
Inspire Record 467225 DOI 10.17182/hepdata.49549
6 data tables

The measured jet broadening distributions (B) in quark and gluon jets seperately.

Measured distributions of -LN(Y2), where Y2 is the differential one-subjet rate, that is the value of the subjet scale parameter where 2 jets appear from the single jet.

The mean subjet multiplicity (-1) for gluon jets and quark jets for different values of the subject resolution parameter Y0.

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Study of hadronic final states from double tagged gamma gamma events at LEP

The ALEPH collaboration Heister, A. ; Schael, S. ; Barate, R. ; et al.
2003.
Inspire Record 619958 DOI 10.17182/hepdata.49702

The interaction of virtual photons is investigated using double tagged gammagamma events with hadronic final states recorded by the ALEPH experiment at e^+e^- centre-of-mass energies between 188 and 209 GeV. The measured cross section is compared to Monte Carlo models, and to next-to-leading-order QCD and BFKL calculations.

10 data tables

Differential cross section as a function of the relative energy of the scattered electrons.

Differential cross section as a function of the polar angle THETA of the scattered electrons.

Differential cross section as a function of the virtuality Q**2 of the photons.

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Exclusive production of pion and kaon meson pairs in two photon collisions at LEP

The ALEPH collaboration Heister, A. ; Schael, S. ; Barate, R. ; et al.
Phys.Lett. B569 (2003) 140-150, 2003.
Inspire Record 626022 DOI 10.17182/hepdata.49730
4 data tables

Measured angular distribution for pion production.

Measured angular distribution for kaon production.

Measured cross section for pion production as a function of W.

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A Measurement of the b quark mass from hadronic Z decays

The ALEPH collaboration Barate, R. ; Decamp, D. ; Ghez, Philippe ; et al.
Eur.Phys.J. C18 (2000) 1-13, 2000.
Inspire Record 531468 DOI 10.17182/hepdata.49909

Hadronic Z decay data taken with the ALEPH detector at LEP1 are used to measure the three-jet rate as well as moments of various event-shape variables. The ratios of the observables obtained from b-tagged events and from an inclusive sample are determined. The mass of the b quark is extracted from a fit to the measured ratios using a next-to-leading order prediction including mass effects. Taking the first moment of the y3 distribution, which is the observable with the smallest hadronization corrections and systematic uncertainties, the result is: mb(MZ) = [3.27+-0.22(stat) +-0.22(exp)+-0.38(had)+-0.16(theo)] GeV/c2. The measured ratio is alternatively employed to test the flavour independence of the strong coupling constant for b and light quarks.

1 data table

No description provided.


Measurements of |V(cb)|, form-factors and branching fractions in the decays anti-B0 ---> D*+ lepton- anti-lepton-neutrino and anti-B0 ---> D+ lepton- anti-lepton-neutrino

The ALEPH collaboration Buskulic, D. ; De Bonis, I. ; Decamp, D. ; et al.
Phys.Lett. B395 (1997) 373-387, 1997.
Inspire Record 425943 DOI 10.17182/hepdata.34082
3 data tables

The formfactors are evaluated at zero recoil of D meson. Two different methods are used (see text for details). VCB is the KCM matrix element. The formfactor fitted to dependence: FF(OM) = FF(1)*(1-CONST*(OM-1)).

VCB is the KCM matrix element.

VCB is the KCM matrix element.


A Measurement of the QCD color factors and a limit on the light gluino

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Z.Phys. C76 (1997) 1-14, 1997.
Inspire Record 440051 DOI 10.17182/hepdata.34162
3 data tables

Fit A: using all kinematical distributions. NC, CF, and TF are the color factors for SU(3) group, NF is the number of the active flavors.

Fit B: using all kinematical distributions, but QCD magnitudes for color factors are used: FA(DEF=NC/CF)) = 2.25 and TF/CF = 0.375. NC, CF, and TF are the color factors for SU(3) group, NF is the number of the active flavors.

Fit C: the QCD magnitudes for color factors and NF = 5 are used.


Measurement of the hadronic photon structure function F2(gamma)(x, Q**2) in two-photon collisions at LEP

The ALEPH collaboration Heister, A. ; Schael, S. ; Barate, R. ; et al.
Eur.Phys.J. C30 (2003) 145-158, 2003.
Inspire Record 631231 DOI 10.17182/hepdata.43218
4 data tables

Measured value of F2/ALPHAE at a mean Q**2 of 17.3 GeV**2.

Measured value of F2/ALPHAE at a mean Q**2 of 67.2 GeV**2.

Statistical correlation coefficients for the F2 measurements at Q**2 = 17.3 GeV**2.

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Measurement of Z-pair production in e+ e- collisions and constraints on anomalous neutral gauge couplings

The ALEPH collaboration Schael, S. ; Barate, R. ; Bruneliere, R. ; et al.
JHEP 0904 (2009) 124, 2009.
Inspire Record 824816 DOI 10.17182/hepdata.52431

The ZZ production cross section is measured from a data sample corresponding to a total integrated luminosity of 452 pb(-')(1), collected by the ALEPH experiment at LEP at centre-of-mass energies from 192 to 209 GeV. Individual cross sections, ext racted at six centre-of-mass energies, are found to be in agreement with Standard Model calculations. The results are used to set limits on anomalous neutral gauge couplings.

1 data table

Measured E+ E- --> Z0 Z0 cross sections.


Studies of QCD at e+ e- centre-of-mass energies between 91-GeV and 209-GeV

The ALEPH collaboration Heister, A. ; Schael, S. ; Barate, R. ; et al.
Eur.Phys.J. C35 (2004) 457-486, 2004.
Inspire Record 636645 DOI 10.17182/hepdata.12794
234 data tables

Mean charged particle multiplicities at different c.m. energies.

XP distribution at c.m. energy 133.0 GeV.

XP distribution at c.m. energy 161.0 GeV.

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Inclusive production of neutral pions in hadronic Z decays

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Z.Phys. C74 (1997) 451-461, 1997.
Inspire Record 427131 DOI 10.17182/hepdata.47655
4 data tables

PI0 multiplicity and cross sections for events with two converted photons.

PI0 multiplicity and cross sections for events with only one converted photon. Final data point for full x range uses jetset 7.4 monte carlo extrapolation prediction.

PI0 cross sections as a function of the transverse momentum PTOUT relative to the plane defined by the sphericity tensor.

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Measurement of the W pair cross-section in e+ e- collisions at 172-GeV

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Phys.Lett. B415 (1997) 435-444, 1997.
Inspire Record 446940 DOI 10.17182/hepdata.47408
2 data tables

Cross sections for the different topologies.

Combined W+ W- cross section.


Study of the muon pair production at center-of-mass energies from 20-GeV to 136-GeV with the ALEPH detector

The ALEPH collaboration Barate, R. ; Buskulic, D. ; Decamp, D. ; et al.
Phys.Lett. B399 (1997) 329-341, 1997.
Inspire Record 440218 DOI 10.17182/hepdata.47490
2 data tables

Exlclusive analysis from events with hard ISR.

Inclusive analysis from evvents with no specific selection of hard ISR.