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SEARCH FOR HIGHLY IONIZING PARTICLES IN E+ E- COLLISIONS AT S**1/2 = 29-GEV

Kinoshita, K. ; Price, P.B. ; Fryberger, D. ;
Phys.Rev.Lett. 48 (1982) 77, 1982.
Inspire Record 177962 DOI 10.17182/hepdata.20613

In a search for highly ionizing particles at PEP, Lexan and CR-39 plastic track detectors were exposed to an integrated luminosity of ∼1037 cm−2 at an energy of 29 GeV in the center of mass. The search was sensitive to particles with magnetic charge 20e≲g≲200e or electric charge 3≲Z≲180. An upper limit on the production cross section of σ<0.9×10−36 cm2 (95% C.L.) is obtained.

1 data table
Table 1

THIS ESTIMATION MAINLY IS BASED ON THE ACCEPTANCE ESTIMATION.


SPIN DEPENDENCE IN NEUTRON PROTON CHARGE EXCHANGE AT 790-MEV

Ransome, R.D. ; Hollas, C.L. ; Riley, P.J. ; et al.
Phys.Rev.Lett. 48 (1982) 781-784, 1982.
Inspire Record 180615 DOI 10.17182/hepdata.20595

The analyzing power A and spin-transfer parameters KNN, KSS, KSL, and KLL have been measured in the np charge-exchange (np→pn) region at 790 MeV. These data provide new and unique information on the spin dependence of the np interaction in the charge-exchange region. Models which explain the charge-exchange peak in the np elastic differential cross section as being due to interference between one-pion exchange and a slowly varying background are in basic agreement with the data.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

USING PHASE-SHIFT VALUES FOR KLS AND KSL.


NEW DECAY MODE OF THE CHARMED BARYON, LAMBDA(C)+ ---> SIGMA0 PI+

Kitagaki, T. ; Tanaka, S. ; Yuta, H. ; et al.
Phys.Rev.Lett. 48 (1982) 299-301, 1982.
Inspire Record 177920 DOI 10.17182/hepdata.20615

In a sample of approximately 17500 charged-current neutrino-deuterium interactions from an exposure of the Fermilab 15-ft bubble chamber to a high-energy wide-band neutrino beam, the charmed baryon Λc+ is observed in a new decay mode, Λc+→Σ0π+. The product of branching ratio and production rate is estimated to be (3.2±2.1)×10−3 for this Σ0π+ channel.

1 data table
Table 1

No description provided.


Charged Multiplicities of High Mass Diffractive $\pi^\pm$, $K^\pm$, and $p^\pm$ States

Cool, R.L. ; Goulianos, Konstantin A. ; Segler, S.L. ; et al.
Phys.Rev.Lett. 48 (1982) 1451-1454, 1982.
Inspire Record 180508 DOI 10.17182/hepdata.20611

A measurement is reported of charged multiplicity distributions of high-mass diffractive π±, K±, and p± states produced in 100 and 200 GeV/c hadron-proton collisions, h+p→X+p. The distributions are described well by a Gaussian function that depends only on the available mass M=Mx−Mh, has a maximum at n0≅2M12, and a peak-to-width ratio n0D≅2.

3 data tables
Table 1

MULTIPLICITY VERSUS AVAILABLE MASS MDD-MPI.

Table 2

MULTIPLICITY VERSUS AVAILABLE MASS (MDD - MK).

Table 3

MULTIPLICITY VERSUS AVAILABLE MASS (MDD - MP).


MEASUREMENT OF DIFFERENTIAL CROSS-SECTION FOR GAMMA D ---> P N BY MONOCHROMATIC PHOTONS IN THE ENERGY RANGE OF DIBARYON RESONANCES

Baba, K. ; Endo, I. ; Fukuma, H. ; et al.
Phys.Rev.Lett. 48 (1982) 729-731, 1982.
Inspire Record 180617 DOI 10.17182/hepdata.20596

The differential cross section for γd→pn has been measured in the energy range between 180 and 600 MeV at c.m. angles 15°, 30°, 42°, and 72°, by using tagged photons. The results, in particular at smaller angles, are in disagreement with theoretical calculations which take into account the effect of dibaryon resonances.

4 data tables
Table 1

FIRST TABLE IS EXACT AVERAGE CM ANGLE AGAINST PHOTON ENERGY FOR THE SECOND TABLE.

Table 2

FIRST TABLE IS EXACT AVERAGE CM ANGLE AGAINST PHOTON ENERGY FOR THE SECOND TABLE.

Table 3

FIRST TABLE IS EXACT AVERAGE CM ANGLE AGAINST PHOTON ENERGY FOR THE SECOND TABLE.

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NEUTRINO FLUX AND TOTAL CHARGED CURRENT CROSS-SECTIONS IN HIGH-ENERGY NEUTRINO DEUTERIUM INTERACTIONS

Kitagaki, T. ; Tanaka, S. ; Yuta, H. ; et al.
Phys.Rev.Lett. 49 (1982) 98-101, 1982.
Inspire Record 182030 DOI 10.17182/hepdata.20571

From 12000 charged-current νμ D events obtained in an exposure of the Fermilab 15-ft bubble chamber to a high-energy wide-band neutrino beam, the absolute neutrino flux is determined using the reaction νμn→μ−p. For the total charged-current cross section, σt=kEν, k=(0.68±0.04±0.10)×10−38 cm2/GeV is obtained for Eν between 10 and 200 GeV. No clear energy dependence of the slope parameter k is observed.

1 data table
Table 1

No description provided.


THE C (ALPHA, X) C-11 CROSS-SECTIONS AT 1.59-GEV AND 4.19-GEV

Geaga, J.V. ; Gazzaly, M.M. ; Igo, G.J. ; et al.
Nucl.Phys.A 386 (1982) 589-598, 1982.
Inspire Record 183652 DOI 10.17182/hepdata.37081

The absolute cross sections for the production of 11 C by 1.59 GeV and 4.19 GeV α-particles incident on natural carbon have been measured to be 46.4 ± 1.3 mb and 42.5 ± 1.1 mb respectively. These results, together with data reported at other energies, indicate that the C(α, X) 11 C cross section becomes approximately constant at a value of about 43 mb for energies above 3 GeV (750 MeV/n). A similar energy dependence is exhibited by the C(p, X) 11 C reaction whose cross section has been measured previously over an extensive energy range. The C(α, X) 11 C cross sections are found to be in good agreement with predictions of a semi-empirical model developed to describe nuclear fragmentation.

1 data table
Table 1

ALL SYSTEMATICAL ERRORS WERE INCLUDED INTO TABULATED ERRORS.


EXPERIMENTAL STUDY OF POLARIZATION IN THE REACTION ANTI-P P ---> ANTI-P P AT 0.7-GeV/c

Kimura, M. ; Takanaka, M. ; Hamatsu, R. ; et al.
Nuovo Cim.A 71 (1982) 438-444, 1982.
Inspire Record 184275 DOI 10.17182/hepdata.37469

The polarization for the\(\bar pp\) elastic scattering was measured as a function of the centre-of-mass angle of scattering between 17° and 90° at the average incident momentum of 0.7 GeV/c by using doublescattering events in a bubble chamber. The average value of the polarization was found to be 0.23 ± 0.05. The angular dependence of the polarization obtained in this experiment was interpreted by the strong absorptive potential model for\(\bar {\mathcal{N}}{\mathcal{N}}\) interactions recently proposed.

1 data table
Table 1

SIGN OF POLARIZATION TAKEN AS POSITIVE ACCORDING TO THE DATA OF ALBROW ET AL., NP B37, 349 (1972).


SUBTHRESHOLD K+ PRODUCTION IN THE INTERACTION OF 1-GEV PROTONS WITH BE, C, AL, CU, SN, AND PB NUCLEI

Abrosimov, N.K. ; Volchenkov, V.A. ; Gordeev, V.A. ; et al.
JETP Lett. 36 (1982) 261-264, 1982.
Inspire Record 185896 DOI 10.17182/hepdata.38014

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


DIRECT MEASUREMENT OF THE GAMMA AND CHARGE MULTIPLICITIES IN ANTI-P P ANNIHILATIONS AT REST

Kalogeropoulos, T.E. ; Onengut, G. ; Petridou, C. ; et al.
Phys.Rev.D 26 (1982) 543-549, 1982.
Inspire Record 182184 DOI 10.17182/hepdata.49298

The γ-to-charge multiplicity ratio 〈Mγ〉〈Mch〉 in N¯N annihilations is restricted by I-spin conservation. In deuterium, the ratio is constrained by I-spin conservation to be equal to 1, while an experiment reported a value of 1.24±0.03; this measurement was based on missing and γ energies. The experiment reported in this paper measures the rate of conversion of γ's as a function of converter thickness and obtains 〈Mγ〉〈Mch〉=1.26±0.03 for p¯p annihilations, which is in agreement with the large γ excess observed in deuterium. Statistical models which ignore I-spin conservation predict such a γ excess, while those taking into account I-spin conservation predict values near 1.

1 data table
Table 1

No description provided.