Home > Research > Publications & Outputs > Measurement of resonance production in the reac...
View graph of relations

Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η. / JADE Collaboration.
In: Zeitschrift für Physik C Particles and Fields, Vol. 47, No. 3, 1990, p. 343-352.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

JADE Collaboration 1990, 'Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η', Zeitschrift für Physik C Particles and Fields, vol. 47, no. 3, pp. 343-352. https://doi.org/10.1007/BF01565857

APA

JADE Collaboration (1990). Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η. Zeitschrift für Physik C Particles and Fields, 47(3), 343-352. https://doi.org/10.1007/BF01565857

Vancouver

JADE Collaboration. Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η. Zeitschrift für Physik C Particles and Fields. 1990;47(3):343-352. doi: 10.1007/BF01565857

Author

JADE Collaboration. / Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η. In: Zeitschrift für Physik C Particles and Fields. 1990 ; Vol. 47, No. 3. pp. 343-352.

Bibtex

@article{b6856846eda84282a61aea1466e291fe,
title = "Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η",
abstract = "Resonance production in the γγ reactionse + e −→e + e + e − π 0 π 0 ande + e − π 0 η has been studied with the JADE detector at PETRA. The decay widths into γγ of thef 2(1270),a 0(980) anda 2(1320) were measured to be Γγγ(f2(1270))=3.19±0.09+0.22−0.38 Kev,Γ λλ(a 0(980))=0.28±0.04±0.10 KeV/BR(a 0(980)→π 0 η) andΓ λλ (a 2(1320))=1.01±0.14±0.22KeV. For thef 0(975) andf 4(2050) upper limits of the widths were obtained,Γ λλ (f 0(975))<0.6 KeV, andΓ λλ(f 4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under thef 2(1270) is small, thef 2(1270) was found to be produced exclusively in a helicity 2 state. The helicity 0 contribution is <15% at the 95% C.L. The cross section forλλ→π 0 π 0 in the mass range 2.0–3.5 GeV/c2 was measured for the first time. Since the cross section forλλ→π + π − is a factor ∼2 larger, ππ production in this range can be interpreted as taking place via isospin 0 production.",
author = "T. Oest and Alexander Finch and {JADE Collaboration}",
year = "1990",
doi = "10.1007/BF01565857",
language = "English",
volume = "47",
pages = "343--352",
journal = "Zeitschrift f{\"u}r Physik C Particles and Fields",
issn = "0170-9739",
publisher = "Springer Verlag",
number = "3",

}

RIS

TY - JOUR

T1 - Measurement of resonance production in the reactionsγγ →π 0 π 0 andγγ →π 0 η

AU - Oest, T.

AU - Finch, Alexander

AU - JADE Collaboration

PY - 1990

Y1 - 1990

N2 - Resonance production in the γγ reactionse + e −→e + e + e − π 0 π 0 ande + e − π 0 η has been studied with the JADE detector at PETRA. The decay widths into γγ of thef 2(1270),a 0(980) anda 2(1320) were measured to be Γγγ(f2(1270))=3.19±0.09+0.22−0.38 Kev,Γ λλ(a 0(980))=0.28±0.04±0.10 KeV/BR(a 0(980)→π 0 η) andΓ λλ (a 2(1320))=1.01±0.14±0.22KeV. For thef 0(975) andf 4(2050) upper limits of the widths were obtained,Γ λλ (f 0(975))<0.6 KeV, andΓ λλ(f 4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under thef 2(1270) is small, thef 2(1270) was found to be produced exclusively in a helicity 2 state. The helicity 0 contribution is <15% at the 95% C.L. The cross section forλλ→π 0 π 0 in the mass range 2.0–3.5 GeV/c2 was measured for the first time. Since the cross section forλλ→π + π − is a factor ∼2 larger, ππ production in this range can be interpreted as taking place via isospin 0 production.

AB - Resonance production in the γγ reactionse + e −→e + e + e − π 0 π 0 ande + e − π 0 η has been studied with the JADE detector at PETRA. The decay widths into γγ of thef 2(1270),a 0(980) anda 2(1320) were measured to be Γγγ(f2(1270))=3.19±0.09+0.22−0.38 Kev,Γ λλ(a 0(980))=0.28±0.04±0.10 KeV/BR(a 0(980)→π 0 η) andΓ λλ (a 2(1320))=1.01±0.14±0.22KeV. For thef 0(975) andf 4(2050) upper limits of the widths were obtained,Γ λλ (f 0(975))<0.6 KeV, andΓ λλ(f 4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under thef 2(1270) is small, thef 2(1270) was found to be produced exclusively in a helicity 2 state. The helicity 0 contribution is <15% at the 95% C.L. The cross section forλλ→π 0 π 0 in the mass range 2.0–3.5 GeV/c2 was measured for the first time. Since the cross section forλλ→π + π − is a factor ∼2 larger, ππ production in this range can be interpreted as taking place via isospin 0 production.

U2 - 10.1007/BF01565857

DO - 10.1007/BF01565857

M3 - Journal article

VL - 47

SP - 343

EP - 352

JO - Zeitschrift für Physik C Particles and Fields

JF - Zeitschrift für Physik C Particles and Fields

SN - 0170-9739

IS - 3

ER -