Strauch, K
SIG/SIG
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Confirmation of the Existence of the Sigma(c)++ and Lambda(c)+ Charmed Baryons

Baltay, C. ; Caroumbalis, D. ; French, H. ; et al.
Phys.Rev.Lett. 42 (1979) 1721, 1979.
Inspire Record 140761 DOI 10.17182/hepdata.50280

In a broadband neutrino exposure of the Fermilab 15-ft bubble chamber, we observe the production of the Σc++(2426) charmed baryon followed by its decay to Λc+(2260) and π+. We find the mass of the Λc+ to be 2257±10 MeV and the m(Σc++)−m(Λc+) mass difference to be 168±3 MeV. Previously unseen two-body decay modes of the Λc+(2260) are observed.

1 data table
Table 1

No description provided.


Measurement of the Relative Total Hadronic Cross-section R at {PETRA}

The Aachen-DESY-Annecy(LAPP)-MIT-NIKHEF-Beijing collaboration Barber, D. ; Becker, U. ; Boehm, A. ; et al.
Phys.Rev.Lett. 42 (1979) 1113, 1979.
Inspire Record 140059 DOI 10.17182/hepdata.3235

We report the first measurement of the ratio R=(σe+e−→hadrons)(σe+e−→μ+μ−) (with negligible τ-lepton contribution) at a center-of-mass energy s=13 GeV and s=17 GeV, from the just finished electron-positron colliding-beam facility PETRA. The detector, MARK-J, has an approximately 4π solid angle and measures γ, e, μ, and charged and neutral hadrons simultaneously. Our results yield R(s=17 GeV)=4.9±0.6 (statistical) ±0.7 (systematic error), and R(s=13 GeV)=4.6±0.5 (statistical) ±0.7 (systematic error). The ratio R(s=17 GeV)R(s=13 GeV) is 1.08±0.18.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Reaction pi- p --> eta n at Large Momentum Transfer

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K. ; Bertolucci, E. ; et al.
Sov.J.Nucl.Phys. 27 (1978) 82-83, 1978.
Inspire Record 119329 DOI 10.17182/hepdata.11051

None

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Dependence of nu nucleus cross-sections on the mass number

Borer, K. ; Hahn, B. ; Hofer, H. ; et al.
Phys.Lett.B 30 (1969) 572-575, 1969.
Inspire Record 63243 DOI 10.17182/hepdata.50061

High energy v -nucleus cross sections have been compared for Pb, Fe, Al and C as target nuclei, exposed to the CERN v -beam. The events with θ vμ < 29 0 and p μ ⪆ 1 GeV /c have rates in the ratio of the mass number of the nuclei. Also a restricted sample with q 2 ⪅ 0.1 (GeV/ c ) 2 and θ vμ < 5 0 does not reveal a theoretically predicted deviation from A -proportionality, although due to the limited statistical accuracy in this restricted sample an “ A 2 3 - contribution ” of several tenths cannot be excluded either.

4 data tables
Table 1

Only statistical error is presented.

Table 2

Only statistical error is presented.

Table 3

Only statistical error is presented.

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