HEPData Search

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A measurement of the energy loss spectrum of 150-GeV muons in iron.

The RD34 collaboration Berger, Edmond L. ; Blair, R. ; Dawson, J. ; et al.

Z.Phys.C 73 (1997) 455-463, 1997.

Inspire Record 425292 DOI 10.17182/hepdata.47726

The energy loss spectrum of 150 GeV muons has been measured with a prototype of the ATLAS hadron calorimeter in the H8 beam of the CERN SPS. The differential probability dP/dv per radiation length of a fractional energy loss v = ΔEμ/Eμ has been measured in the range v = 0.01 ÷ 0.95; it is compared with the theoretical predictions for energy losses due to bremsstrahlung and production of electron—positron pairs or of energetic knock-on electrons. The integrated probability $\int_{0.01}^{0.95}({\rm d}P/{\rm d}v){\rm d}v$ is (1.610 ± 0.015stat ± 0.105syst) · 10−3 in agreement with the theoretical predictions 1.556 · 10−3 and 1.619 · 10−3. Agreement with theory is also found in two intervals of v where production of electron-positron pairs and knock-on electrons dominates. In the region of bremsstrahlung dominance (v = 0.12 ÷ 0.95) the measured integrated probability (1.160 ± 0.040stat ± 0.075syst) · 10−4 is in agreement with the theoretical value of 1.185 · 10−4, obtained using the Petrukhin and Shestakov description of the bremsstrahlung process. The same result is about 3.6 standard deviations (defined as the quadratic sum of statistical and systematic errors) lower than the theoretical prediction of 1.472 · 10−4, obtained using Tsai’s description of bremsstrahlung.

2 data tables

Table 1

Measured differential probability values DPROB/DNU for fractional energy loss. Only statistical errors are given.

Table 2

Integrated probability (DELTA(PROB)) per radiation length.

Preliminary results of data handling at SIGMA-AYAKS experiment on search of dibaryons with separated color in pi Be interactions at momentum 43-GeV/c. (In Russian)

The SIGMA-AYAKS collaboration Kartasheva, V.G. ;

IFVE-96-45, 1996.

Inspire Record 428804 DOI 10.17182/hepdata.40525

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

CROSS-SECTIONS FOR THE PRODUCTION OF C-11 IN C TARGETS BY 3.65-A/GeV PROJECTILES

Kozma, P. ; Tolstov, K.D. ; Yanovsky, V.V. ;

Nucl.Instrum.Meth.A 291 (1990) 662-663, 1990.

Inspire Record 286473 DOI 10.17182/hepdata.30228

None

1 data table

Table 1

No description provided.

PRODUCTION OF HIGH MOMENTUM NEGATIVE PIONS BY 800-MEV PROTONS AT 0-DEGREES TO 20-DEGREES

Barlow, D.B. ; Nefkens, B.M.K. ; Pillai, C.T. ; et al.

Nucl.Instrum.Meth.A 271 (1988) 471-474, 1988.

Inspire Record 270458 DOI 10.17182/hepdata.37244

The π − yield in the momentum range 500–740 MeV/ c produced by 800 MeV protons incident on targets of Be and C has been measured at laboratory production angles between 0° and 20°. The yield of 725 MeV/ c π − from Be and C at 0° is a factor of 6 greater than at 20°, for 600 MeV/ c π − the factor is 3. The yield from beryllium is typically 30% higher than from carbon.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

VERY LOW-ENERGY PION PRODUCTION AT A 300-GeV PROTON BEAM

Bertin, A. ; Capponi, M. ; De Castro, S. ; et al.

CERN-EP/86-196, 1986.

Inspire Record 235590 DOI 10.17182/hepdata.49628

None

2 data tables

Table 1

Data obtained with 30 cm long target.

Table 2

Data from E.Zavattini, Proc. Conf. on Nuclear and Particle Physics at Intermediate Energies with Hadrons, Miramare ( Trieste), 1985, eds. T.Bressani and G.Pauli ( Italian Physical Socirty, Bologna, 1986) p.241. Data obtained with 1.27*1.27*7.62 cm**3 target.

ATOMIC PARITY VIOLATION MEASUREMENTS IN THE HIGHLY FORBIDDEN (6)S(1/2) - (7)S(1/2) CESIUM TRANSITION. 3. DATA ACQUISITION AND PROCESSING. RESULTS AND IMPLICATIONS

Bouchiat, M.A. ; Guena, J. ; Pottier, L. ; et al.

J.Phys.(France) 47 (1986) 1709-1730, 1986.

Inspire Record 232798 DOI 10.17182/hepdata.38588

This paper completes the detailed presentation of our PV experiment on the 6S1/2 - 7S1/2 transition in Cs. A detailed description of the data acquisition and processing is given. The results of two independent measurements made on ΔF = 0 and ΔF =1 hfs components agree, providing an important cross-check. After a complete reanalysis of systematics and calibration, the precision is slightly improved, leading to the weighted average Im Epv 1/β = - 1.52 ± 0.18 mV/cm. Later results from an independent group agree quite well. With the semi-empirical value β = (26.8 ± 0.8) a30, our result yields Epv1 = (- 0.79 ± 0.10) x 10-11 i |e|a0. Coupled with the atomic calculations, this implies that the weak nuclear charge of Cs is Qw = -68 ± 9. This value agrees with the standard electroweak theory and leads to a weak interaction angle sin2 θ W = 0.21 ± 0.04. The complementarity of these measurements with high energy experiments is illustrated.

3 data tables

Table 1

Revision of the earlier experiment PL 117B, 358. (7s)2S1/2:F=4 --> (6s)2S1/2:F=4 transition.

Table 2

Revision of the earlier experiment PL 134B, 463. (7s)2S1/2:F=3 --> (6s)2S1/2:F=4 transition.

Table 3

Combined of the two above measurements following the philosophy: quadratic sum of the statistical and systematic uncertainties and weighting each result by the squared reciprocal of that uncertainty. (7s)2S1/2 --> (6s)2S1/2 transitions.

Operation and Performance of a System for $\pi p$ and $\pi D$ Backward Scattering

Stanovnik, A. ; Kernel, G. ; Tanner, N.W. ; et al.

Nucl.Instrum.Meth. 177 (1980) 369, 1980.

Inspire Record 152948 DOI 10.17182/hepdata.41451

A simple, large-solid-angle apparatus, specially suited for the measurement of backward elastic scattering of medium-energy pions on protons and deuterons, is described. The method of analysis which reduces background and determines elastic events from a data sample of 185 MeV negative pions incident on a D 2 O target is discussed. Results for 141 MeV π + p and 185 MeV π − p backward cross-sections are also presented and compared with cross-sections calculated from known phase shifts.

2 data tables

Table 1

Table 2