Allison, J.
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Search for Leptons Produced in Association with Prompt Muons in Hadronic Interactions

Lipton, R. ; Gobbi, B. ; Keren, J. ; et al.
Phys.Rev.Lett. 40 (1978) 608, 1978.
Inspire Record 121096 DOI 10.17182/hepdata.42602

We present the results of a search for leptons produced in coincidence with a prompt muon in neutron-beryllium collisions at 300 GeV/c. The experiment was sensitive to trigger muons and associated leptons of both low momentum and low transverse momentum. A clear μ±μ∓ signal was found, but no significant μ±e∓ signal was observed. We report an upper limit for associated charmed-particle production [σCC¯·B(C→μ+X)·B(C→e+X)] of < 340 nb/nucleon, at the 95% confidence level.

1 data table
Table 1

The cross section for CHARM and CHARMBNAR particle production is obtained with the assumption that BR(CHARM --> MU+ X) = 15 PCT.


Search for D0 (1865) Mesons Produced in Association with Prompt Muons in Hadronic Interactions

Spelbring, D. ; Gobbi, B. ; Keren, J. ; et al.
Phys.Rev.Lett. 40 (1978) 605, 1978.
Inspire Record 121095 DOI 10.17182/hepdata.42612

We present the results of a search at Fermilab for the charmed meson, D∘(1865), produced in association with a prompt muon by 300-GeV/c neutrons. We observe no significant enhancement in high-mass K±π∓ systems and report, at the 95% confidence level, an upper limit of 200 nb/nucleon for the production of a pair of charmed particles and their subsequent decay into a K±π∓ state and a prompt muon.

1 data table
Table 1

The cross section for D0 and CHARM particle production is obtained with theassumption that BR(D0 --> K- PI+) = 3 PCT and BR(CHARM --> MU+ X) = 15 PCT.


Measurement of Rates for Muonless Deep Inelastic Neutrino and anti-neutrino Interactions

Aubert, Bernard ; Benvenuti, A.C. ; Cline, D. ; et al.
Phys.Rev.Lett. 32 (1974) 1457, 1974.
Inspire Record 1123 DOI 10.17182/hepdata.21890

Relative rates for deep inelastic neutrino and antineutrino scattering without a finalstate muon have been measured. For neutrinos the result is Rν=σ(νμ+nucleon→νμ+hadrons)σ(νμ+nucleon→μ−+hadrons)=0.11±0.05. The corresponding ratio for antineutrinos is Rν¯=0.32±0.09.

1 data table
Table 1

No description provided.


Approximate Scaling of Multiplicity Distributions as a Function of Missing Mass

Barshay, S. ; Engelmann, R. ; Kafka, T. ; et al.
Phys.Rev.Lett. 32 (1974) 1390, 1974.
Inspire Record 1032 DOI 10.17182/hepdata.21933

Data from p+p→p+X at 102, 205, and 405 GeV and from π−+p→p+X at 205 GeV exhibit an approximate scaling property in the charged-prong multiplicity distributions as a function of the missing mass for the range 5<~MX<~13 GeV.

1 data table
Table 1

No description provided.


Further observation of muonless neutrino-induced inelastic interactions.

Aubert, Bernard ; Benvenuti, A.C. ; Cline, D. ; et al.
Phys.Rev.Lett. 32 (1974) 1454-1457, 1974.
Inspire Record 882 DOI 10.17182/hepdata.21934

We report here additional positive results of a search for muonless neutrino- and anti-neutrino-induced events using an enriched antineutrino beam and a muon identifier of relatively high geometric detection efficiency. The ratio of muonless to muon event rates is observed to be R=0.20±0.05. We observe no background derived from ordinary neutrino or antineutrino interactions that is capable of explaining the muonless signal.

1 data table
Table 1

No description provided.


Coherent Dissociation of Neutrons on Nuclei at 100-GeV/c to 300-GeV/c

Mollet, W. ; Biel, J. ; Ferbel, T. ; et al.
Phys.Rev.Lett. 39 (1977) 1646, 1977.
Inspire Record 121537 DOI 10.17182/hepdata.20983

We have studied the coherent dissociation of neutrons into pπ− systems, for a variety of nuclear targets, at incident momenta up to 300 GeV/c. Using a model incorporating both electromagnetic and hadronic production, we have extracted total cross sections for scattering of unstable pπ− systems on nucleons.

1 data table
Table 1

No description provided.


Observation of the p wave singlet state of charmonium

Armstrong, T.A. ; Bettoni, D. ; Bharadwaj, V. ; et al.
Phys.Rev.Lett. 69 (1992) 2337-2340, 1992.
Inspire Record 338054 DOI 10.17182/hepdata.42562

We have performed a search for the 1P1 state of charmonium resonantly formed in p¯p annihilations, close to the center of gravity of the 3PJ states. We report results from the study of the J/ψ+π0 and J/ψ+2π final states. We have observed a statistically significant enhancement in the p¯+p→J/ψ+π0 cross section at √s ≃3526.2 MeV. This enhancement has the characteristics of a narrow resonance of mass, total width, and production cross section consistent with what is expected for the 1P1 state. In our search we have found no candidates for the reactions p¯+p→J/ψ+π0+π0 and p¯+p→J/ψ+π++π−.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Direct Measurement of the pi- Form-Factor.

Dally, E.B. ; Drickey, Darrell James ; Hauptman, J.M. ; et al.
Phys.Rev.Lett. 39 (1977) 1176-1179, 1977.
Inspire Record 123313 DOI 10.17182/hepdata.20975

We have measured the electromagnetic form factor of the charged pion by direct scattering of 100-GeV/c π− from stationary electrons in a liquid-hydrogen target at Fermilab. The deviations from the pointlike pion-scattering cross section may be characterized by a root-mean-square charge radius for the pion of 〈rπ2〉12=0.56±0.04 F.

1 data table
Table 1

No description provided.


Factorial and Cumulant Moments in $e^{+}e^{-}\to$ Hadrons at the Z$^0$ Resonance

The SLD collaboration Abe, K. ; Abt, I. ; Ahn, C.J. ; et al.
Phys.Lett.B 371 (1996) 149-156, 1996.
Inspire Record 415576 DOI 10.17182/hepdata.41682

We present the first experimental study of the ratio of cumulant to factorial moments of the charged-particle multiplicity distribution in high-energy particle interactions, using hadronic Z$^0$ decays collected by the SLD experiment at SLAC. We find that this ratio, as a function of the moment-rank $q$, decreases sharply to a negative minimum at $q=5$, which is followed by quasi-oscillations. These features are insensitive to experimental systematic effects and are in qualitative agreement with expectations from next-to-next-to-leading-order perturbative QCD.

1 data table
Table 1

CONST is the cumulant to factorial moments ratio. See text for definition.


Production of Multi - Pion Systems With Large Longitudinal Momentum at the {CERN} {ISR}

Lockman, William S. ; Meyer, T. ; Rander, J. ; et al.
Phys.Rev.Lett. 41 (1978) 680-683, 1978.
Inspire Record 6695 DOI 10.17182/hepdata.20814

Inclusive cross sections are presented for 2π and 3π systems with large longitudinal x at the highest intersecting storage ring energies (s=53 GeV for 2π; s=53 and 62 GeV for 3π). The ratio π+π−π−π− rises sharply with increasing x similar to the ratio K+K−, as expected in a quark-model interpretation.

2 data tables
Table 1

The differential cross section is fitted by the equation : E*D3(SIG)/D3(P) = CONST*(1-XL)**POWER*EXP(-SLOPE*PT**2).

Table 2

The differential cross section is fitted by the equation : E*D3(SIG)/D3(P) = CONST*(1-XL)**POWER*EXP(-SLOPE*PT**2).