New measurement of the properties of the rare decay K+ → π+e+e-

R. Appel; G. S. Atoyan; B. Bassalleck; D. R. Bergman; D. N. Brown; N. Cheung; S. Dhawan; H. Do; J. Egger; S. Eilerts; C. Felder; H. Fischer; M. Gach; W. Herold; V. V. Issakov; H. Kaspar; D. E. Kraus; D. M. Lazarus; L. Leipuner; P. Lichard; J. Lowe; J. Lozano; H. Ma; W. Majid; W. Menzel; S. Pislak; A. A. Poblaguev; V. E. Postoev; A. L. Proskurjakov; P. Rehak; P. Robmann; A. Sher; T. L. Thomas; J. A. Thompson; P. Truöl; H. Weyer; M. E. Zeller

doi:10.1103/PhysRevLett.83.4482

New measurement of the properties of the rare decay K⁺ → π⁺e⁺e^-

R. Appel
, G. S. Atoyan
, B. Bassalleck
, D. R. Bergman
, D. N. Brown
, N. Cheung
, S. Dhawan
, H. Do
, J. Egger
, S. Eilerts
, C. Felder
, H. Fischer
, M. Gach
, W. Herold
, V. V. Issakov
, H. Kaspar
, D. E. Kraus
, D. M. Lazarus
, L. Leipuner
, P. Lichard

J. Lowe, J. Lozano, H. Ma, W. Majid, W. Menzel, S. Pislak, A. A. Poblaguev, V. E. Postoev, A. L. Proskurjakov, P. Rehak, P. Robmann, A. Sher, T. L. Thomas, J. A. Thompson, P. Truöl, H. Weyer, M. E. Zeller

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

103 Scopus citations

Abstract

A low-background sample of 10 300 events has been collected for the decay mode K⁺ → π⁺e⁺e^- by experiment E865 at the Brookhaven Alternating Gradient Synchrotron. The branching ratio is measured to be [2.94±0.05(stat)±0.13(syst)±0.05(model)]×10^-7, the vector nature of this decay is firmly established, and the decay form factor f(z)=f₀(1+δz)(z = M²_ee/m²_K) is determined to have δ = 2.14±0.13±0.15. The experiment is described and results discussed in the context of chiral perturbation theory.

Original language	English
Pages (from-to)	4482-4485
Number of pages	4
Journal	Physical Review Letters
Volume	83
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.83.4482
State	Published - 1999

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Appel, R., Atoyan, G. S., Bassalleck, B., Bergman, D. R., Brown, D. N., Cheung, N., Dhawan, S., Do, H., Egger, J., Eilerts, S., Felder, C., Fischer, H., Gach, M., Herold, W., Issakov, V. V., Kaspar, H., Kraus, D. E., Lazarus, D. M., Leipuner, L., ... Zeller, M. E. (1999). New measurement of the properties of the rare decay K⁺ → π⁺e⁺e^-. Physical Review Letters, 83(22), 4482-4485. https://doi.org/10.1103/PhysRevLett.83.4482

@article{50a195f56955405d8ee2174bf6d3c63e,

title = "New measurement of the properties of the rare decay K+ → π+e+e-",

abstract = "A low-background sample of 10 300 events has been collected for the decay mode K+ → π+e+e- by experiment E865 at the Brookhaven Alternating Gradient Synchrotron. The branching ratio is measured to be [2.94±0.05(stat)±0.13(syst)±0.05(model)]×10-7, the vector nature of this decay is firmly established, and the decay form factor f(z)=f0(1+δz)(z = M2ee/m2K) is determined to have δ = 2.14±0.13±0.15. The experiment is described and results discussed in the context of chiral perturbation theory.",

author = "R. Appel and Atoyan, \{G. S.\} and B. Bassalleck and Bergman, \{D. R.\} and Brown, \{D. N.\} and N. Cheung and S. Dhawan and H. Do and J. Egger and S. Eilerts and C. Felder and H. Fischer and M. Gach and W. Herold and Issakov, \{V. V.\} and H. Kaspar and Kraus, \{D. E.\} and Lazarus, \{D. M.\} and L. Leipuner and P. Lichard and J. Lowe and J. Lozano and H. Ma and W. Majid and W. Menzel and S. Pislak and Poblaguev, \{A. A.\} and Postoev, \{V. E.\} and Proskurjakov, \{A. L.\} and P. Rehak and P. Robmann and A. Sher and Thomas, \{T. L.\} and Thompson, \{J. A.\} and P. Tru{\"o}l and H. Weyer and Zeller, \{M. E.\}",

year = "1999",

doi = "10.1103/PhysRevLett.83.4482",

language = "English",

volume = "83",

pages = "4482--4485",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "22",

}

Appel, R, Atoyan, GS, Bassalleck, B, Bergman, DR, Brown, DN, Cheung, N, Dhawan, S, Do, H, Egger, J, Eilerts, S, Felder, C, Fischer, H, Gach, M, Herold, W, Issakov, VV, Kaspar, H, Kraus, DE, Lazarus, DM, Leipuner, L, Lichard, P, Lowe, J, Lozano, J, Ma, H, Majid, W, Menzel, W, Pislak, S, Poblaguev, AA, Postoev, VE, Proskurjakov, AL, Rehak, P, Robmann, P, Sher, A, Thomas, TL, Thompson, JA, Truöl, P, Weyer, H & Zeller, ME 1999, 'New measurement of the properties of the rare decay K⁺ → π⁺e⁺e^-', Physical Review Letters, vol. 83, no. 22, pp. 4482-4485. https://doi.org/10.1103/PhysRevLett.83.4482

TY - JOUR

T1 - New measurement of the properties of the rare decay K+ → π+e+e-

AU - Appel, R.

AU - Atoyan, G. S.

AU - Bassalleck, B.

AU - Bergman, D. R.

AU - Brown, D. N.

AU - Cheung, N.

AU - Dhawan, S.

AU - Do, H.

AU - Egger, J.

AU - Eilerts, S.

AU - Felder, C.

AU - Fischer, H.

AU - Gach, M.

AU - Herold, W.

AU - Issakov, V. V.

AU - Kaspar, H.

AU - Kraus, D. E.

AU - Lazarus, D. M.

AU - Leipuner, L.

AU - Lichard, P.

AU - Lowe, J.

AU - Lozano, J.

AU - Ma, H.

AU - Majid, W.

AU - Menzel, W.

AU - Pislak, S.

AU - Poblaguev, A. A.

AU - Postoev, V. E.

AU - Proskurjakov, A. L.

AU - Rehak, P.

AU - Robmann, P.

AU - Sher, A.

AU - Thomas, T. L.

AU - Thompson, J. A.

AU - Truöl, P.

AU - Weyer, H.

AU - Zeller, M. E.

PY - 1999

Y1 - 1999

N2 - A low-background sample of 10 300 events has been collected for the decay mode K+ → π+e+e- by experiment E865 at the Brookhaven Alternating Gradient Synchrotron. The branching ratio is measured to be [2.94±0.05(stat)±0.13(syst)±0.05(model)]×10-7, the vector nature of this decay is firmly established, and the decay form factor f(z)=f0(1+δz)(z = M2ee/m2K) is determined to have δ = 2.14±0.13±0.15. The experiment is described and results discussed in the context of chiral perturbation theory.

AB - A low-background sample of 10 300 events has been collected for the decay mode K+ → π+e+e- by experiment E865 at the Brookhaven Alternating Gradient Synchrotron. The branching ratio is measured to be [2.94±0.05(stat)±0.13(syst)±0.05(model)]×10-7, the vector nature of this decay is firmly established, and the decay form factor f(z)=f0(1+δz)(z = M2ee/m2K) is determined to have δ = 2.14±0.13±0.15. The experiment is described and results discussed in the context of chiral perturbation theory.

UR - https://www.scopus.com/pages/publications/0000312401

U2 - 10.1103/PhysRevLett.83.4482

DO - 10.1103/PhysRevLett.83.4482

M3 - Article

AN - SCOPUS:0000312401

SN - 0031-9007

VL - 83

SP - 4482

EP - 4485

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

ER -

New measurement of the properties of the rare decay K⁺ → π⁺e⁺e^-

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