Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ

D. Aston; N. Awaji; T. Bienz; F. Bird; J. D'Amore; W. Dunwoodie; R. Endorf; K. Fujii; H. Hayashii; S. Iwata; W. Johnson; R. Kajikawa; P. Kunz; Y. Kwon; D. Leith; L. Levinson; J. Martinez; T. Matsui; B. Meadows; A. Miyamoto; M. Nussbaum; H. Ozaki; C. Pak; B. Ratcliff; P. Rensing; D. Schultz; S. Shapiro; T. Shimomura; P. Sinervo; A. Sugiyama; S. Suzuki; G. Tarnopolsky; T. Tauchi; N. Toge; K. Ukai; A. Waite; S. Williams

doi:10.1016/0920-5632(91)90243-8

Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ

D. Aston, N. Awaji, T. Bienz, F. Bird, J. D'Amore, W. Dunwoodie, R. Endorf, K. Fujii, H. Hayashii, S. Iwata, W. Johnson, R. Kajikawa, P. Kunz, Y. Kwon, D. Leith, L. Levinson, J. Martinez, T. Matsui, B. Meadows, A. MiyamotoM. Nussbaum, H. Ozaki, C. Pak, B. Ratcliff, P. Rensing, D. Schultz, S. Shapiro, T. Shimomura, P. Sinervo, A. Sugiyama, S. Suzuki, G. Tarnopolsky, T. Tauchi, N. Toge, K. Ukai, A. Waite, S. Williams

Department of Physics

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

Preliminary results are presented from an analysis of the π⁺π^- system produced in the reaction K^-p → π⁺π^-Λ at 11 GeV/c observed with the LASS spectrometer at SLAC. A clear ρ{variant} - ω interference effect is observed, and a fit to the natural parity exchange mass distribution yields a branching fraction estimate of (1.7 ± 0.5) % for the decay ω → π⁺π^-. An amplitude analysis reveals that the bump in the mass distribution in the vicinity of the f{hook}₂(1270) actually contains a significant P-wave component. The mass dependence of the corresponding amplitude and phase is well described by a resonant Breit-Wigner line-shape with mass (1266 ± 14) MeV/c², width (166 ± 35) MeV/c², and estimated elasticity ∼ 5%. The interpretation of this state as the first radial excitation of the ρ{variant}(770) is discussed.

Original language	English
Pages (from-to)	105-110
Number of pages	6
Journal	Nuclear Physics B (Proceedings Supplements)
Volume	21
Issue number	C
DOIs	https://doi.org/10.1016/0920-5632(91)90243-8
Publication status	Published - 1991 Jun

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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10.1016/0920-5632(91)90243-8

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Aston, D., Awaji, N., Bienz, T., Bird, F., D'Amore, J., Dunwoodie, W., Endorf, R., Fujii, K., Hayashii, H., Iwata, S., Johnson, W., Kajikawa, R., Kunz, P., Kwon, Y., Leith, D., Levinson, L., Martinez, J., Matsui, T., Meadows, B., ... Williams, S. (1991). Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ. Nuclear Physics B (Proceedings Supplements), 21(C), 105-110. https://doi.org/10.1016/0920-5632(91)90243-8

@article{81fbb7c977ed402880317dd361d7ca62,

title = "Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ",

abstract = "Preliminary results are presented from an analysis of the π+π- system produced in the reaction K-p → π+π-Λ at 11 GeV/c observed with the LASS spectrometer at SLAC. A clear ρ{variant} - ω interference effect is observed, and a fit to the natural parity exchange mass distribution yields a branching fraction estimate of (1.7 ± 0.5) % for the decay ω → π+π-. An amplitude analysis reveals that the bump in the mass distribution in the vicinity of the f{hook}2(1270) actually contains a significant P-wave component. The mass dependence of the corresponding amplitude and phase is well described by a resonant Breit-Wigner line-shape with mass (1266 ± 14) MeV/c2, width (166 ± 35) MeV/c2, and estimated elasticity ∼ 5%. The interpretation of this state as the first radial excitation of the ρ{variant}(770) is discussed.",

author = "D. Aston and N. Awaji and T. Bienz and F. Bird and J. D'Amore and W. Dunwoodie and R. Endorf and K. Fujii and H. Hayashii and S. Iwata and W. Johnson and R. Kajikawa and P. Kunz and Y. Kwon and D. Leith and L. Levinson and J. Martinez and T. Matsui and B. Meadows and A. Miyamoto and M. Nussbaum and H. Ozaki and C. Pak and B. Ratcliff and P. Rensing and D. Schultz and S. Shapiro and T. Shimomura and P. Sinervo and A. Sugiyama and S. Suzuki and G. Tarnopolsky and T. Tauchi and N. Toge and K. Ukai and A. Waite and S. Williams",

year = "1991",

month = jun,

doi = "10.1016/0920-5632(91)90243-8",

language = "English",

volume = "21",

pages = "105--110",

journal = "Nuclear Physics B (Proceedings Supplements)",

issn = "0920-5632",

publisher = "Elsevier",

number = "C",

}

Aston, D, Awaji, N, Bienz, T, Bird, F, D'Amore, J, Dunwoodie, W, Endorf, R, Fujii, K, Hayashii, H, Iwata, S, Johnson, W, Kajikawa, R, Kunz, P, Kwon, Y, Leith, D, Levinson, L, Martinez, J, Matsui, T, Meadows, B, Miyamoto, A, Nussbaum, M, Ozaki, H, Pak, C, Ratcliff, B, Rensing, P, Schultz, D, Shapiro, S, Shimomura, T, Sinervo, P, Sugiyama, A, Suzuki, S, Tarnopolsky, G, Tauchi, T, Toge, N, Ukai, K, Waite, A & Williams, S 1991, 'Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ', Nuclear Physics B (Proceedings Supplements), vol. 21, no. C, pp. 105-110. https://doi.org/10.1016/0920-5632(91)90243-8

TY - JOUR

T1 - Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ

AU - Aston, D.

AU - Awaji, N.

AU - Bienz, T.

AU - Bird, F.

AU - D'Amore, J.

AU - Dunwoodie, W.

AU - Endorf, R.

AU - Fujii, K.

AU - Hayashii, H.

AU - Iwata, S.

AU - Johnson, W.

AU - Kajikawa, R.

AU - Kunz, P.

AU - Kwon, Y.

AU - Leith, D.

AU - Levinson, L.

AU - Martinez, J.

AU - Matsui, T.

AU - Meadows, B.

AU - Miyamoto, A.

AU - Nussbaum, M.

AU - Ozaki, H.

AU - Pak, C.

AU - Ratcliff, B.

AU - Rensing, P.

AU - Schultz, D.

AU - Shapiro, S.

AU - Shimomura, T.

AU - Sinervo, P.

AU - Sugiyama, A.

AU - Suzuki, S.

AU - Tarnopolsky, G.

AU - Tauchi, T.

AU - Toge, N.

AU - Ukai, K.

AU - Waite, A.

AU - Williams, S.

PY - 1991/6

Y1 - 1991/6

N2 - Preliminary results are presented from an analysis of the π+π- system produced in the reaction K-p → π+π-Λ at 11 GeV/c observed with the LASS spectrometer at SLAC. A clear ρ{variant} - ω interference effect is observed, and a fit to the natural parity exchange mass distribution yields a branching fraction estimate of (1.7 ± 0.5) % for the decay ω → π+π-. An amplitude analysis reveals that the bump in the mass distribution in the vicinity of the f{hook}2(1270) actually contains a significant P-wave component. The mass dependence of the corresponding amplitude and phase is well described by a resonant Breit-Wigner line-shape with mass (1266 ± 14) MeV/c2, width (166 ± 35) MeV/c2, and estimated elasticity ∼ 5%. The interpretation of this state as the first radial excitation of the ρ{variant}(770) is discussed.

AB - Preliminary results are presented from an analysis of the π+π- system produced in the reaction K-p → π+π-Λ at 11 GeV/c observed with the LASS spectrometer at SLAC. A clear ρ{variant} - ω interference effect is observed, and a fit to the natural parity exchange mass distribution yields a branching fraction estimate of (1.7 ± 0.5) % for the decay ω → π+π-. An amplitude analysis reveals that the bump in the mass distribution in the vicinity of the f{hook}2(1270) actually contains a significant P-wave component. The mass dependence of the corresponding amplitude and phase is well described by a resonant Breit-Wigner line-shape with mass (1266 ± 14) MeV/c2, width (166 ± 35) MeV/c2, and estimated elasticity ∼ 5%. The interpretation of this state as the first radial excitation of the ρ{variant}(770) is discussed.

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U2 - 10.1016/0920-5632(91)90243-8

DO - 10.1016/0920-5632(91)90243-8

M3 - Article

SN - 0920-5632

VL - 21

SP - 105

EP - 110

JO - Nuclear Physics B (Proceedings Supplements)

JF - Nuclear Physics B (Proceedings Supplements)

IS - C

ER -

Evidence for ϱ1(1270) production in the reaction K-p → π+π-Λ

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