Awa, S
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Partial-wave analyses of the (3π)-system in the reaction π − p → π − π − π + p at 11.2 GeV/ c

The Bologna-Florence-Genoa-Milan-Oxford-Pavia collaboration Thompson, G. ; Antich, P. ; Boldetti, A. ; et al.
Nucl.Phys.B 101 (1975) 285-303, 1975.
Inspire Record 2860 DOI 10.17182/hepdata.36138

The results are presented of two partial-wave analyses of the (3π) − system in 30 000 events of the reaction π − p → π − π − π + p at 11.2 GeV/ c . Both techniques incorporate the assumptions of the isobar model and are (a) the University of Illinois program which fits in terms of the (3π) density matrix elements and (b) an amplitude parametrisaton including possible effects of both spin non-flip and spin flip at the baryon vertex. The results obtained with these independent programs are found to be very close.

2 data tables
Table 1

NORMALIZED TO A TOTAL REACTION CROSS SECTION OF 1.17 +- 0.24 MB. ALL QUOTED CROSS SECTIONS ARE FOR INTEGRATED BREIT-WIGNERS.

Table 2

A2 2+D-WAVE FOR 1.2 < M(3PI) < 1.4 GEV. THE FIRST THREE COMBINATIONS OF DENSITY MATRIX ELEMENTS ARE FOR NATURAL PARITY EXCHANGE, AND THE REMAINDER UNNATURAL.


Experimental Study of Nuclear Shadowing in Photoproduction

Michalowski, S. ; Andrews, D. ; Eickmeyer, J. ; et al.
Phys.Rev.Lett. 39 (1977) 737-740, 1977.
Inspire Record 124559 DOI 10.17182/hepdata.20970

The total cross section for hadron production by high-energy photons has been measured from a number of nuclei ranging from hydrogen to uranium. Some shadowing is observed at a level considerably less than predicted by conventional vector-meson dominance but consistent with a modified theory. The energy dependence predicted by vectormeson dominance is observed. The shadowing in heavy nuclei shows a smooth transition from electroproduction to photoproduction.

1 data table
Table 1

No description provided.


Search for Production of D*- by Pions Near Threshold

Cester, R. ; Fitch, V.L. ; Kadel, R.W. ; et al.
Phys.Rev.Lett. 40 (1978) 139, 1978.
Inspire Record 6024 DOI 10.17182/hepdata.21922

We have searched for production of charmed mesons in the reaction π−+N→D*−+X, D*−→π−+D¯0, D¯0→K++π− at a beam momentum of 10.5 GeV/c. We measure the cross section times branching ratio to be 7±20 nb/nucleon.

1 data table
Table 1

No description provided.


Inclusive Production of $K^*$ (892) and $\Sigma$ (1385) in $\bar{p} p$ Interactions at 3.6-{GeV}/$c$ and a Test of Factorization Hypothesis

Banerjee, S. ; Ganguli, S.N. ; Malhotra, P.K. ; et al.
Z.Phys.C 3 (1979) 1, 1979.
Inspire Record 8142 DOI 10.17182/hepdata.15990

We present a study of the inclusive production ofK*(892) and ∑t+-(1385)+cc at 3.6 GeV/c from\(\bar p\)p interactions. The sensitivity of the exposure is 35.4 events/μb. Longitudinal and transverse momentum distributions are presented. The indirect production ofKs0 from parentK* and that of Λ's from parent Σ(1385) are studied. The shape of thex distribution of Λ's for\(p\xrightarrow{{\bar p}}\Lambda \) are calculated from\(p\xrightarrow{p}\Lambda \) and\(p\xrightarrow{{\pi ^ -}}\Lambda \) and compared with the experimental distributions. The difference of antiparticle production cross-section ofKs0 in the central region is compared with the expectation from Mueller-Regge formalism.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Energy Dependence of the $P P \to \pi^+ D$ Differential Cross-section Between 500-{MeV} and 600-{MeV}

Hoftiezer, J. ; Weddigen, C. ; Favier, B. ; et al.
Phys.Lett.B 100 (1981) 462-465, 1981.
Inspire Record 170182 DOI 10.17182/hepdata.31203

The unpolarized differential cross section for the reaction pp→π + d has been measured at SIN at seven energies between 514 and 583 MeV. Data are presented in terms of a Legendre polynomial expansion. An observed strong energy dependence of the 4th order coefficient can be understood as a threshold phenomenon in a phenomenological NΔ resonant description. No evidence was found for a 1 D 2 dibaryon resonance near 600 MeV.

2 data tables
Table 1

LEGENDRE POLYNOMIAL EXPANSION COEFFICIENTS DEFINED BY 4*PI*D(SIG)/DOMEGA = LEG(L=0)*P0 + LEG(L=2)*P2 + LEG(L=4)*P4. THUS, LEG(L=0) IS INTEGRATED CROSS SECTION SIG.

Table 2

COEFFICIENTS OF COS(THETA)**2 EXPANSION OF 32*PI*D(SIG)/DOMEGA.


Measurement of the $p p$ Cross-sections in the Momentum Range 0.9-2.0 GeV/c

Shimizu, F. ; Kubota, Y. ; Koiso, H. ; et al.
Nucl.Phys.A 386 (1982) 571-588, 1982.
Inspire Record 11839 DOI 10.17182/hepdata.37042

The pp total, elastic, and all the inelastic cross sections were measured at 11 momenta in the range 0.9–2.0 GeV/c. No clear structure was observed in their momentum dependences. The momentum dependence of the total cross section agrees quite well with the result of a phase-shift analysis by Arndt. Our measurement of the ppπ 0 and pnπ + cross sections served to normalize the earlier systematic but relative and extrapolated measurements of these cross sections over a narrower momentum range. Calculations by König and Kroll based on a pion exchange model including the effect of an I = 1 dibaryon did not fit the single-pion production cross sections.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of $p p$ Interactions in the Momentum Range 0.9-{GeV}/$c$ to 2.0-{GeV}/$c$

Shimizu, F. ; Koiso, H. ; Kubota, Y. ; et al.
Nucl.Phys.A 389 (1982) 445-456, 1982.
Inspire Record 12089 DOI 10.17182/hepdata.37051

pp interactions at 11 momenta in the range 0.9 to 2.0 GeV/ c have been studied. The elastic angular distributions, covering the c.m. angular range 22°–90°, agree in general with Hoshizaki's phase-shift analysis which shows the looping 1 D in and 3 F 3 amplitudes in the Argand diagram. About 80% of pn π + events come from the n Δ ++ state at all momenta above 1.2 GeV/ c . The behavior of the density matrix elements of the Δ ++ show no momentum or angular dependence. A large fraction of pp π 0 events also come from the p Δ + state at all momenta above 1.2 GeV/ c . The behavior of the Δ + density matrix elements is similar to that for the case of Δ ++ .

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


A STUDY OF e+ e- ANNIHILATION IN THE 1400-MeV TO 2250-MeV ENERGY RANGE WITH THE MAGNETIC DETECTOR DM2 AT DCI

Augustin, J.E. ; Ayach, L. ; Calcaterra, A. ; et al.
LAL-83-21, 1983.
Inspire Record 192321 DOI 10.17182/hepdata.13242

None

5 data tables
Table 1

ASSUMING ABS(GE)=ABS(GM).

Table 2

No description provided.

Table 3

No description provided.

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MEASUREMENT OF THE ANTI-P P ---> ANTI-N N DIFFERENTIAL CROSS-SECTIONS AT LOW MOMENTA AND CONFIRMATION OF THE FORWARD DIP

Nakamura, K. ; Fujii, T. ; Kageyama, T. ; et al.
Phys.Rev.Lett. 53 (1984) 885-888, 1984.
Inspire Record 207326 DOI 10.17182/hepdata.20405

The differential cross sections of the reaction p―p→n―n were measured at 390, 490, 590, 690, and 780 MeV/c. The existence of the theoretically predicted forward dip is confirmed. The results are compared with the predictions of various N―N potential models.

6 data tables
Table 1

NUMERICAL VALUES SUPPLIED BY F. SAI.

Table 2

NUMERICAL VALUES SUPPLIED BY F. SAI.

Table 3

NUMERICAL VALUES SUPPLIED BY F. SAI.

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Studies of $\bar{p} p \to \bar{n} n$ and $\bar{n} p$ Annihilation at Incident Momenta of 700-{MeV}/$c$ and 760-{MeV}/$c$

The Bombay-Chandigarh-Jammu-Tokyo collaboration Banerjee, S. ; Ganguli, S.N. ; Gurtu, A. ; et al.
Z.Phys.C 28 (1985) 163, 1985.
Inspire Record 217418 DOI 10.17182/hepdata.1974

Results are presented on the charge exchange reaction\(\bar pp \to \bar nn\) and\(\bar np\) annihilations from bubble chamber exposures to antiproton beam of momenta 700 and 760 MeV/c. The differential cross section of\(\bar pp \to \bar nn\) shows a forward spike followed by a clear dip bump structure. Total annihilation cross section of\(\bar np\) for average\(\bar n\) momentum of 700 MeV/c has been evaluated to be 55.4±2.2 mb. The multiplicity, Feynmanx andpT2 distributions for inclusive charged pions in\(\bar pp\) and\(\bar np\) annihilations are found to be similar. The emission of charged pions from\(\bar np\) annihilations are found to be consistent with thermodynamic models with temperature ∼110 MeV.

11 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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