Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η

T. Oest, J. Olsson, J. Allison, K. Ambrus, R. J. Barlow, W. Bartel, S. Bethke, C. K. Bowdery, S. L. Cartwright, J. Chrin, D. Clarke, A. Dieckmann, I. P. Duerdoth, G. Eckerlin, E. Elsen, R. Felst, A. J. Finch, F. Foster, T. Greenshaw, J. HagemannD. Haidt, J. Heintze, G. Heinzelmann, K. H. Hellenbrand, P. Hill, G. Hughes, H. Kado, Kiyotomo Kawagoe, C. Kleinwort, G. Knies, S. Komamiya, H. Krehbiel, J. v. Krogh, M. Kuhlen, F. K. Loebinger, A. A. Macbeth, N. Magnussen, R. Marshall, R. Meinke, R. P. Middleton, P. G. Murphy, B. Naroska, J. M. Nye, F. Ould-Saada, D. Pitzl, R. Ramcke, H. Rieseberg, A. Sato, D. Schmidt, L. Smolik, U. Schneekloth, J. A.J. Skard, J. Spitzer, P. Steffen, K. Stephens, T. Takeshita, A. Wagner, I. W. Walker, G. Weber, M. Zimmer, G. T. Zorn

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Resonance production in the γγ reactions e+e-→e+e+e-π0π0 and e+e-π0η has been studied with the JADE detector at PETRA. The decay widths into γγ of the f2(1270), a0(980) and a2(1320) were measured to be {Mathematical expression} Kev, Γλλ(a0(980))=0.28±0.04±0.10 KeV/BR(a0(980)→π0η) and Γλλ(a2(1320))=1.01±0.14±0.22KeV. For the f0(975) and f4(2050) upper limits of the widths were obtained, Γλλ(f0(975))<0.6 KeV, and Γλλ(f4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under the f2(1270) is small, the f2(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 for λλ→π0π0 in the mass range 2.0-3.5 GeV/c2 was measured for the first time. Since the cross section for λλ→π+π- is a factor ∼2 larger, ππ production in this range can be interpreted as taking place via isospin 0 production.

Original languageEnglish
Pages (from-to)343-351
Number of pages9
JournalZeitschrift für Physik C Particles and Fields
Volume47
Issue number3
DOIs
Publication statusPublished - Sep 1 1990
Externally publishedYes

Fingerprint

cross sections
Detectors
detectors
decay

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Oest, T., Olsson, J., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., ... Zorn, G. T. (1990). Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η. Zeitschrift für Physik C Particles and Fields, 47(3), 343-351. https://doi.org/10.1007/BF01565857

Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η. / Oest, T.; Olsson, J.; Allison, J.; Ambrus, K.; Barlow, R. J.; Bartel, W.; Bethke, S.; Bowdery, C. K.; Cartwright, S. L.; Chrin, J.; Clarke, D.; Dieckmann, A.; Duerdoth, I. P.; Eckerlin, G.; Elsen, E.; Felst, R.; Finch, A. J.; Foster, F.; Greenshaw, T.; Hagemann, J.; Haidt, D.; Heintze, J.; Heinzelmann, G.; Hellenbrand, K. H.; Hill, P.; Hughes, G.; Kado, H.; Kawagoe, Kiyotomo; Kleinwort, C.; Knies, G.; Komamiya, S.; Krehbiel, H.; v. Krogh, J.; Kuhlen, M.; Loebinger, F. K.; Macbeth, A. A.; Magnussen, N.; Marshall, R.; Meinke, R.; Middleton, R. P.; Murphy, P. G.; Naroska, B.; Nye, J. M.; Ould-Saada, F.; Pitzl, D.; Ramcke, R.; Rieseberg, H.; Sato, A.; Schmidt, D.; Smolik, L.; Schneekloth, U.; Skard, J. A.J.; Spitzer, J.; Steffen, P.; Stephens, K.; Takeshita, T.; Wagner, A.; Walker, I. W.; Weber, G.; Zimmer, M.; Zorn, G. T.

In: Zeitschrift für Physik C Particles and Fields, Vol. 47, No. 3, 01.09.1990, p. 343-351.

Research output: Contribution to journalArticle

Oest, T, Olsson, J, Allison, J, Ambrus, K, Barlow, RJ, Bartel, W, Bethke, S, Bowdery, CK, Cartwright, SL, Chrin, J, Clarke, D, Dieckmann, A, Duerdoth, IP, Eckerlin, G, Elsen, E, Felst, R, Finch, AJ, Foster, F, Greenshaw, T, Hagemann, J, Haidt, D, Heintze, J, Heinzelmann, G, Hellenbrand, KH, Hill, P, Hughes, G, Kado, H, Kawagoe, K, Kleinwort, C, Knies, G, Komamiya, S, Krehbiel, H, v. Krogh, J, Kuhlen, M, Loebinger, FK, Macbeth, AA, Magnussen, N, Marshall, R, Meinke, R, Middleton, RP, Murphy, PG, Naroska, B, Nye, JM, Ould-Saada, F, Pitzl, D, Ramcke, R, Rieseberg, H, Sato, A, Schmidt, D, Smolik, L, Schneekloth, U, Skard, JAJ, Spitzer, J, Steffen, P, Stephens, K, Takeshita, T, Wagner, A, Walker, IW, Weber, G, Zimmer, M & Zorn, GT 1990, 'Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η', Zeitschrift für Physik C Particles and Fields, vol. 47, no. 3, pp. 343-351. https://doi.org/10.1007/BF01565857
Oest, T. ; Olsson, J. ; Allison, J. ; Ambrus, K. ; Barlow, R. J. ; Bartel, W. ; Bethke, S. ; Bowdery, C. K. ; Cartwright, S. L. ; Chrin, J. ; Clarke, D. ; Dieckmann, A. ; Duerdoth, I. P. ; Eckerlin, G. ; Elsen, E. ; Felst, R. ; Finch, A. J. ; Foster, F. ; Greenshaw, T. ; Hagemann, J. ; Haidt, D. ; Heintze, J. ; Heinzelmann, G. ; Hellenbrand, K. H. ; Hill, P. ; Hughes, G. ; Kado, H. ; Kawagoe, Kiyotomo ; Kleinwort, C. ; Knies, G. ; Komamiya, S. ; Krehbiel, H. ; v. Krogh, J. ; Kuhlen, M. ; Loebinger, F. K. ; Macbeth, A. A. ; Magnussen, N. ; Marshall, R. ; Meinke, R. ; Middleton, R. P. ; Murphy, P. G. ; Naroska, B. ; Nye, J. M. ; Ould-Saada, F. ; Pitzl, D. ; Ramcke, R. ; Rieseberg, H. ; Sato, A. ; Schmidt, D. ; Smolik, L. ; Schneekloth, U. ; Skard, J. A.J. ; Spitzer, J. ; Steffen, P. ; Stephens, K. ; Takeshita, T. ; Wagner, A. ; Walker, I. W. ; Weber, G. ; Zimmer, M. ; Zorn, G. T. / Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η. In: Zeitschrift für Physik C Particles and Fields. 1990 ; Vol. 47, No. 3. pp. 343-351.
@article{2af456086d1d49f68de7760d14491f69,
title = "Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η",
abstract = "Resonance production in the γγ reactions e+e-→e+e+e-π0π0 and e+e-π0η has been studied with the JADE detector at PETRA. The decay widths into γγ of the f2(1270), a0(980) and a2(1320) were measured to be {Mathematical expression} Kev, Γλλ(a0(980))=0.28±0.04±0.10 KeV/BR(a0(980)→π0η) and Γλλ(a2(1320))=1.01±0.14±0.22KeV. For the f0(975) and f4(2050) upper limits of the widths were obtained, Γλλ(f0(975))<0.6 KeV, and Γλλ(f4(2050))<1.1 KeV, both at the 95{\%} C.L. Assuming that the spin 0 background under the f2(1270) is small, the f2(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 for λλ→π0π0 in the mass range 2.0-3.5 GeV/c2 was measured for the first time. Since the cross section for λλ→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 J. Olsson and J. Allison and K. Ambrus and Barlow, {R. J.} and W. Bartel and S. Bethke and Bowdery, {C. K.} and Cartwright, {S. L.} and J. Chrin and D. Clarke and A. Dieckmann and Duerdoth, {I. P.} and G. Eckerlin and E. Elsen and R. Felst and Finch, {A. J.} and F. Foster and T. Greenshaw and J. Hagemann and D. Haidt and J. Heintze and G. Heinzelmann and Hellenbrand, {K. H.} and P. Hill and G. Hughes and H. Kado and Kiyotomo Kawagoe and C. Kleinwort and G. Knies and S. Komamiya and H. Krehbiel and {v. Krogh}, J. and M. Kuhlen and Loebinger, {F. K.} and Macbeth, {A. A.} and N. Magnussen and R. Marshall and R. Meinke and Middleton, {R. P.} and Murphy, {P. G.} and B. Naroska and Nye, {J. M.} and F. Ould-Saada and D. Pitzl and R. Ramcke and H. Rieseberg and A. Sato and D. Schmidt and L. Smolik and U. Schneekloth and Skard, {J. A.J.} and J. Spitzer and P. Steffen and K. Stephens and T. Takeshita and A. Wagner and Walker, {I. W.} and G. Weber and M. Zimmer and Zorn, {G. T.}",
year = "1990",
month = "9",
day = "1",
doi = "10.1007/BF01565857",
language = "English",
volume = "47",
pages = "343--351",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",
number = "3",

}

TY - JOUR

T1 - Measurement of resonance production in the reactions γγ →π0π0 and γγ →π0η

AU - Oest, T.

AU - Olsson, J.

AU - Allison, J.

AU - Ambrus, K.

AU - Barlow, R. J.

AU - Bartel, W.

AU - Bethke, S.

AU - Bowdery, C. K.

AU - Cartwright, S. L.

AU - Chrin, J.

AU - Clarke, D.

AU - Dieckmann, A.

AU - Duerdoth, I. P.

AU - Eckerlin, G.

AU - Elsen, E.

AU - Felst, R.

AU - Finch, A. J.

AU - Foster, F.

AU - Greenshaw, T.

AU - Hagemann, J.

AU - Haidt, D.

AU - Heintze, J.

AU - Heinzelmann, G.

AU - Hellenbrand, K. H.

AU - Hill, P.

AU - Hughes, G.

AU - Kado, H.

AU - Kawagoe, Kiyotomo

AU - Kleinwort, C.

AU - Knies, G.

AU - Komamiya, S.

AU - Krehbiel, H.

AU - v. Krogh, J.

AU - Kuhlen, M.

AU - Loebinger, F. K.

AU - Macbeth, A. A.

AU - Magnussen, N.

AU - Marshall, R.

AU - Meinke, R.

AU - Middleton, R. P.

AU - Murphy, P. G.

AU - Naroska, B.

AU - Nye, J. M.

AU - Ould-Saada, F.

AU - Pitzl, D.

AU - Ramcke, R.

AU - Rieseberg, H.

AU - Sato, A.

AU - Schmidt, D.

AU - Smolik, L.

AU - Schneekloth, U.

AU - Skard, J. A.J.

AU - Spitzer, J.

AU - Steffen, P.

AU - Stephens, K.

AU - Takeshita, T.

AU - Wagner, A.

AU - Walker, I. W.

AU - Weber, G.

AU - Zimmer, M.

AU - Zorn, G. T.

PY - 1990/9/1

Y1 - 1990/9/1

N2 - Resonance production in the γγ reactions e+e-→e+e+e-π0π0 and e+e-π0η has been studied with the JADE detector at PETRA. The decay widths into γγ of the f2(1270), a0(980) and a2(1320) were measured to be {Mathematical expression} Kev, Γλλ(a0(980))=0.28±0.04±0.10 KeV/BR(a0(980)→π0η) and Γλλ(a2(1320))=1.01±0.14±0.22KeV. For the f0(975) and f4(2050) upper limits of the widths were obtained, Γλλ(f0(975))<0.6 KeV, and Γλλ(f4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under the f2(1270) is small, the f2(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 for λλ→π0π0 in the mass range 2.0-3.5 GeV/c2 was measured for the first time. Since the cross section for λλ→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 reactions e+e-→e+e+e-π0π0 and e+e-π0η has been studied with the JADE detector at PETRA. The decay widths into γγ of the f2(1270), a0(980) and a2(1320) were measured to be {Mathematical expression} Kev, Γλλ(a0(980))=0.28±0.04±0.10 KeV/BR(a0(980)→π0η) and Γλλ(a2(1320))=1.01±0.14±0.22KeV. For the f0(975) and f4(2050) upper limits of the widths were obtained, Γλλ(f0(975))<0.6 KeV, and Γλλ(f4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under the f2(1270) is small, the f2(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 for λλ→π0π0 in the mass range 2.0-3.5 GeV/c2 was measured for the first time. Since the cross section for λλ→π+π- is a factor ∼2 larger, ππ production in this range can be interpreted as taking place via isospin 0 production.

UR - http://www.scopus.com/inward/record.url?scp=34249952803&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34249952803&partnerID=8YFLogxK

U2 - 10.1007/BF01565857

DO - 10.1007/BF01565857

M3 - Article

AN - SCOPUS:34249952803

VL - 47

SP - 343

EP - 351

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 3

ER -