Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ϕ</mml:mi></mml:math>Production in Proton-Nucleus Collisions at 400 GeV/<i>c</i>

Akerlof, C.; Alley, P.; Bintinger, D.; Ditzler, W. R.; Finley, D. A.; Johnson, O. E.; Koltick, D.; Loeffler, F.J.; Loveless, R. L.; Meyer, D. I.; Shibata, E. I.; Stanfield, K.; Thun, R.; Yovanovitch, D.

doi:10.1103/physrevlett.39.861

Cited by 34 publications

(4 citation statements)

References 20 publications

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“…At this higher energies φ production through channels accompanied by non-strange hadrons was found to dominate strongly over its production in channels accompanied with strange hadrons. Measurements of φ production in protonnucleus collisions at √ s N N = 27.4 GeV have also shown that it takes place primarily by other than OZI allowed processes [30]. Experiments studying inclusive φ production off protons by hadrons at incident momenta 63 and 93 GeV/c also show that the production of φ mesons are from OZI allowed processes [31].…”

Section: φ Meson Production and Strangeness Enhancementmentioning

confidence: 97%

Energy and system size dependence of ϕmeson production in Cu+Cu and Au+Au collisions

2008

Preprint

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We study the beam-energy and system-size dependence of φ meson production (using the hadronic decay mode φ → K + K − ) by comparing the new results from Cu+Cu collisions and previously reported Au+Au collisions at √ s NN = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented are from midrapidity (|y| <0.5) for 0.4 < p T < 5 GeV/c. At a given beam energy, the transverse momentum distributions for φ mesons are observed to be similar in yield and shape for Cu+Cu and Au+Au colliding systems with similar average numbers of participating nucleons. The φ meson yields in nucleus-nucleus collisions, normalised by the average number of participating nucleons, are found to be enhanced relative to those from p+p collisions with a different trend compared to strange baryons. The enhancement for φ mesons is observed to be higher at √ s NN = 200 GeV compared to 62.4 GeV. These observations for the produced φ(ss) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.

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Section: φ Meson Production and Strangeness Enhancementmentioning

confidence: 97%

Energy and system size dependence of ϕmeson production in Cu+Cu and Au+Au collisions

2008

Preprint

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“…5). Using s/u = 0.32 (default value 0.33) and V/(V + P S) = 0.30 (default value 0.50), we obtain for this ratio 0.44 ± 0.01 while the corresponding measurement is 0.42±0.04 [31]. All Lund Monte Carlo parameters have been set to their default values except for s/u and the relative abundances of vector and tensor mesons.…”

Section: Methods Of Analysismentioning

confidence: 99%

“…In contrast, for the K * 0 (892), K * 0 (892) and the φ, the HT contribution is expected to be negligible; they constitute therefore an excellent bench mark for our LT simulation programs (see Sect. These two parameters have been tuned to reproduce the measurement of φ/π − in proton nucleus interactions at 400 GeV/c given in [31]. The standard pythia program [2] has been used in order to get the yields predicted from the LT processes.…”

Section: Methods Of Analysismentioning

confidence: 99%

Search for higher twists in meson resonance production in $\pi^-$ N interactions at $p_T \geq 2$ GeV/c

al.¹

1996

Zeitschrift f�r Physik C Particles and Fields

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We study the production of meson resonance at p T ≥ 2 GeV/c in π − Be interactions at two beam energies (150 and 300 GeV/c). The motivation is to look for the higher twist (HT) production mechanism, expected to exist besides standard hadron production through the fragmentation process of scattered quarks and gluons, the socalled leading twist (LT) mechanism. We show that the φ, K * 0 (892) and K * 0 (892) are found free from HT effects with a good accuracy, as expected from HT estimates and qcd sum rules. The magnitudes of the f 2 (1270) and ρ 0 mesons signals are found larger than expected from the standard Lund (LT) Monte Carlo and from information provided by e + e − annihilation experiments. The possible connection of these excesses with HT physics is discussed. We also report the first evidence for the production of f 0 (975) mesons in hadronic experiments at large p T .

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“…An example is pp -+ ¢0 + X; this reaction has the advantage that the ¢0 is easy to detect (assuming good K identification). In addition, it is known [18] that at Fermilab the ~o/rr ratio is ~-0.05 for PT > 3 GeV/c. However, the W + boson decays into cg as easily as it does into ud.…”

Section: "Strong" Backgroundmentioning

confidence: 99%

Detection of intermediate vector bosons and high-energy weak interactions from decay of hadron resonances

Haber

Kane

1978

Nuclear Physics B

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We discuss the detection of parity violating effects in the production of hadron resonances as a way to identify weak interactions at high energies. Numerical results indicate that such effects due to the production of W's and Z's should be observable at Isabelle energies. Observation of such effects may be the best method to establish that high-mass resonances or new behavior of cross sections are not hadronic in origin. By observing hadron resonances with different quantum numbers, it is possible to study the flavor dependence of high-energy weak effects; the energy dependence of the ~0[*r ratio may even be a useful signal of W production. We also calculate predictions for polarized beams. The possibility of observing unconventional kinds of weak interactions is briefly considered.

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Measurement ofϕProduction in Proton-Nucleus Collisions at 400 GeV/c

Cited by 34 publications

References 20 publications

Energy and system size dependence of ϕmeson production in Cu+Cu and Au+Au collisions

Energy and system size dependence of ϕmeson production in Cu+Cu and Au+Au collisions

Search for higher twists in meson resonance production in $\pi^-$ N interactions at $p_T \geq 2$ GeV/c

Detection of intermediate vector bosons and high-energy weak interactions from decay of hadron resonances

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