Guttner, F.
Max results
Sort by Reverse order

Showing 10 of 5325 results

Date

Study of the Reactions $e^+ e^- \to \rho \eta$, $\rho \pi$, $\phi \pi$ and $\phi \eta$ for Total Energy Ranges Between 1.4-{GeV} and 2.18-{GeV}

Delcourt, B. ; Bisello, D. ; Bizot, J.C. ; et al.
Phys.Lett.B 113 (1982) 93, 1982.
Inspire Record 176802 DOI 10.17182/hepdata.30917

The reactions e + e − → ρη , ρπ , φπ and φη have been studied with the magnetic detector DM1 at DCI in the total energy ranges between 1.4 and 2.18 GeV. The ρη signal is clearly seen. Upper limits for ρπ and φη channels as well as for the OZI forbidden φπ channel.

4 data tables
Table 1

No description provided.

Table 2

UPPER LIMIT TO SIG AS EXPLAINED IN SYSTEMATICS.

Table 3

UPPER LIMIT TO CROSS SECTION AT CL=90 PCT.

More…

Inclusive Strange Resonance Production in $p p$, $\pi^+ p$ and $K^+ p$ Interactions at 147 GeV/c

Brick, D. ; Rudnicka, H. ; Shapiro, A.M. ; et al.
Phys.Rev.D 25 (1982) 2248-2258, 1982.
Inspire Record 176545 DOI 10.17182/hepdata.23976

We have studied the inclusive production of K*±(890) and Y*±(1385) in pp, π+p, and K+p interactions at 147 GeV/c. The experiment used the Fermilab 30-inch hydrogen bubble chamber with the hybrid spectrometer system. Results are based on a sample of 1916 observed KS and 932 observed A. Inclusive cross sections are given for K*± and Y*± production from the three beams, and comparisons are made with experiments at other energies. Feynman-x and transverse-momentum-squared distributions are also calculated. The results suggest that the K*− is entirely produced in the central region, while the K*+ includes a component from beam fragmentation. Comparisons are made with the additive quark model.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A Study of Deep Inelastic Hadron - Hadron Collisions with a Large Acceptance Calorimeter Trigger

The Bari-Cracow-Liverpool-Munich-Nijmegen collaboration De Marzo, C. ; De Palma, M. ; Distante, A. ; et al.
Phys.Lett.B 112 (1982) 173-177, 1982.
Inspire Record 176541 DOI 10.17182/hepdata.34014

Large transverse energy cross sections of 300 GeV/ c pions and protons on hydrogen have been measured with a segmented calorimeter covering the central rapidity region −0.88 < y < 0.67 and 2 π in azimuth. The selected events show large multiplicities and no jet-like event structure. Processes more complicated than the scattering of two constituents appear to dominate these inelastic collisions.

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

SEARCH FOR NONSTRANGE BARYONIUM STATES IN THE BARYON EXCHANGE REACTION K- P ---> Y0 ANTI-P P AT 18.5-GeV/c

The BARI-BIRMINGHAM-CERN-MILAN-PARIS-PAVIA collaboration Armstrong, T. ; Baubillier, M. ; Beusch, W. ; et al.
Nucl.Phys.B 206 (1982) 185-192, 1982.
Inspire Record 184140 DOI 10.17182/hepdata.34058

Narrow baryonium production in the baryon exchange reactions K − p → Λ p p and K − p → pK − p p at 18.5 GeV/ c is investigated in a 12 events/nb experiment performed at the CERN Ω′ spectrometer. No narrow structure is observed in the p p mass spectra. Upper limits for production of baryonium states are given as a function of p p mass.

2 data tables
Table 1

'1'. (AP P) SYSTEM PRODUCED IN BACKWARD DIRECTION IN THE CMS.

Table 2

'1'. (AP P) SYSTEM PRODUCED IN BACKWARD DIRECTION IN THE CMS.


A PARTIAL WAVE ANALYSIS OF THE K PI PI SYSTEM PRODUCED IN THE REACTION K- P ---> ANTI-K0 PI+ PI- N AT 8.25-GeV/c

The BIRMINGHAM-CERN-GLASGOW-MICHIGAN STATE-PARIS collaboration Baubillier, M. ; Bloodworth, I.J. ; Burns, A. ; et al.
Nucl.Phys.B 202 (1982) 21-42, 1982.
Inspire Record 182033 DOI 10.17182/hepdata.34133

A partial-wave analysis of the K 0 π + π − system from the reaction K − p → K 0 π + π − n has been carried out using data obtained at 8.25 GeV/ c in a high-statistics experiment. A strong signal appears in the 1 + SO + (K ∗ π) wave at the Q 2 mass (≈ 1.4 GeV). The 1 + S0 + (ϱK) wave behaves rather like a background and does not exhibit the characteristics of a resonance. A prominent signal also appears in the 2 + D wave (via K ∗ π and ϱK); it is interpreted as the K ∗ (1430). In the L region (1.6–2.1) GeV, there is evidence for the 3 − K ∗ (1780) while the 2 − wave also gives some contribution.

2 data tables
Table 1

FULLY CORRECTED CROSS SECTION.

Table 2

RESONANCE FITS CROSS SECTIONS USING BREIT WIGNER FUNCTION. NOTE THAT FOR THE K*(1780) THE CROSS SECTION DETERMINATION IS STRONGLY DEPENDENT ON THE BACKGROUND ASSUMED WHICH HAS BEEN ONLY SUBTRACTED AT 8.25 GEV.


MEASUREMENTS OF THE MULTIPLICITIES IN THE COLLISION OF HADRONS WITH HEAVY NUCLEI AT 200-GEV/C

Brick, D.H. ; Rudnicka, H. ; Shapiro, A.M. ; et al.
Nucl.Phys.B 201 (1982) 189-196, 1982.
Inspire Record 181081 DOI 10.17182/hepdata.34199

We report on the interactions of an incident 200 GeV / c beam composed of 33% protons, 16% kaons, and 48% pions on targets of silver and gold mounted in the Fermilab 30″ bubble chamber. Within our limited statistics, we find the total cross sections and average multiplicities to agree with previously published data. We find the KNO scaling distribution curve to be broader for heavy nuclei than for hydrogen. We present the first data for V 0 production on gold and silver. We also present, for the first time, evidence for a positive charge excess among the sample of relativistic tracks from interactions on gold and silver. We observe a trend where the positive charge excess increases with target atomic number and with increasing charged particle multiplicity. We find the charge excess to exist among the sample of particles having greater than 2 GeV / c momentum and to persist in the sample with momentum greater than 4 GeV / c .

4 data tables
Table 1

SIG REFERS PRODUCTION OF 2 OR MORE CHARGED PARTICLES EXCLUDING ELASTICS BUT INCLUDING COHERENT PRODUCTION. MULT REFERS TO RELATIVISTIC SECONDARIES (BETA > 0.7).

Table 2

NO CORRECTION FOR GAMMA CONVERSIONS IN THE TARGET IN THIS TABLE BUT DIFFERENCE DOES NOT NEED CORRECTION.

Table 3

No description provided.

More…

rivet Analysis
DECAY OF B MESONS INTO CHARGED AND NEUTRAL KAONS

The CLEO collaboration Brody, A. ; Chen, A. ; Goldberg, M. ; et al.
Phys.Rev.Lett. 48 (1982) 1070-1074, 1982.
Inspire Record 180612 DOI 10.17182/hepdata.27749

Data on inclusive kaon production in e+e− annihilations at energies in the vicinity of the ϒ(4S) resonance are presented. A clear excess of kaons is observed on the ϒ(4S) compared to the continuum. Under the assumption that the ϒ(4S) decays into BB¯, a total of 3.38±0.34±0.68 kaons per ϒ(4S) decay is found. In the context of the standard B-decay model this leads to a value for (b→c)(b→all) of 1.09±0.33±0.13.

2 data tables
Table 1

No description provided.

Table 2

ACCEPTANCE CORRECTED MOMENTUM DISTRIBUTIONS FOR CONTINUUM AND UPSILON EVENTS WITH THE CONTINUUM SUBTRACTED.


CROSS-SECTION FOR C (ALPHA, X) C-11 AT 0.64-GEV - 2.8-GEV

Radin, J.r. ; Quechon, H. ; Raisbeck, G.m. ; et al.
Phys.Rev.C 26 (1982) 2565-2571, 1982.
Inspire Record 184731 DOI 10.17182/hepdata.26336

The absolute cross section for the reaction C(α, X)C11 has been measured from 0.64 to 2.8 GeV using a counter telescope to determine the alpha flux and a plastic scintillator target to determine the C11 activity. The results are 55.6±2.2 mb (0.64 GeV), 49.2±1.9 mb (1.2 GeV), 44.1±1.8 mb (2.0 GeV), and 42.0±1.7 mb (2.8 GeV). NUCLEAR REACTIONS C(α, X)C11, E=0.64, 1.2, 2.0, 2.8 GeV; measured absolute cross section.

1 data table
Table 1

No description provided.


KAON SCATTERING FROM C AND CA AT 800-MEV/C

Marlow, Daniel R. ; Barnes, P.D. ; Colella, N.J. ; et al.
Phys.Rev.C 25 (1982) 2619-2637, 1982.
Inspire Record 180999 DOI 10.17182/hepdata.26337

Results from K± elastic and inelastic scattering from C12 and Ca40 are reported. The data were all taken at an incident momentum of 800 MeV/c over an angular range from 2° to 38°. The elastic data are compared to first-order optical model calculations in coordinate and momentum space; good qualitative agreement is obtained. The inelastic data (from C12 only) are compared to distorted-wave Born approximation calculations, and good agreement is found if "realistic" inelastic transition densities are used. Although a first-order optical potential description does not describe the data fully, there are strong indications of the increased penetrability of K+ over K− in this energy range. NUCLEAR REACTIONS C12(K±,K±)C12, Ca40(K±,K±)Ca40, E=442 MeV (800 MeV/c), measured σ(θ) for elastic and inelastic scattering, compared to optical model and DWBA calculations, deduced optical potential parameters; θ=2°−38°, Δθ=1°.

4 data tables
Table 1

X ERROR D(THETA) = 1.0100 DEG.

Table 2

X ERROR D(THETA) = 1.0100 DEG.

Table 3

X ERROR D(THETA) = 1.1000 DEG.

More…

INCLUSIVE K0 PRODUCTION IN E+ E- ANNIHILATION AT THE UPSILON RESONANCES

Giannini, G. ; Finocchiaro, G. ; Lee-Franzini, Juliet ; et al.
Nucl.Phys.B 206 (1982) 1-11, 1982.
Inspire Record 183794 DOI 10.17182/hepdata.28689

We report on inclusive K 0 production in the region of the upsilon resonances (9.4–10.6 GeV). The K 0 yield for the resonances and continuum below the B B threshold is found to be constant at 0.82 ± 0.10 K 0 per observed hadronic event. At the ϒ (4S), however, the K 0 yield is significantly higher, 1.58 ± 0.35. This increase in K 0 production and the differential cross section d σ /d p of kaons are consistent with B B decay of the ϒ (4S) resonance with the bottom quarks subsequently decaying primarily into charmed quarks.

2 data tables
Table 1

No description provided.

Table 2

ACCEPTANCE CORRECTED INCLUSIVE K0 MOMENTUM DISTRIBUTION AT THE UPSI(10570)0.