Measurement of the decay Υ{hooked}′→Υ{hooked}π+π-

B. Niczyporuk; T. Zełudziewicz; K. W. Chen; R. Hartung; G. Folger; B. Lurz; H. Vogel; U. Volland; H. Wegener; J. K. Bienlein; R. Graumann; J. Krüger; M. Leissner; M. Schmitz; F. H. Heimlich; R. Nernst; A. Schwarz; U. Strohbusch; H. J. Trost; P. Zschorsch; A. Engler; R. W. Kraemer; F. Messing; C. Rippich; B. Stacey; S. Youssef; A. Fridman; G. Alexander; A. Av-Shalom; G. Bella; Y. Gnat; J. Grunhaus; E. Hörber; W. Langguth; M. Scheer

doi:10.1016/0370-2693(81)90295-1

Measurement of the decay Υ{hooked}′→Υ{hooked}π⁺π^-

B. Niczyporuk^*, T. Zełudziewicz, K. W. Chen, R. Hartung, G. Folger, B. Lurz, H. Vogel, U. Volland, H. Wegener, J. K. Bienlein, R. Graumann, J. Krüger, M. Leissner, M. Schmitz, F. H. Heimlich, R. Nernst, A. Schwarz, U. Strohbusch, H. J. Trost, P. ZschorschA. Engler, R. W. Kraemer, F. Messing, C. Rippich, B. Stacey, S. Youssef, A. Fridman, G. Alexander, A. Av-Shalom, G. Bella, Y. Gnat, J. Grunhaus, E. Hörber, W. Langguth, M. Scheer

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

We report the first observation of the decay Υ{hooked}′→Υ{hooked}π⁺π^-→l⁺l^-π⁺π^-. The 7 events seen yield a branching ratio B(Υ{hooked}′→Υ{hooked}π⁺π^-)=(19±8)%. A consistent value of B=(26±13)% is obtained from the charged multiplicities of the Υ{hooked}′ and Υ{hooked} decays. Using these values we deduce Γ_tot(Υ{hooked}′)=(31⁺¹⁰_-8) keV and B_ee(Υ{hooked}′)=(1.8±0.5)%. Furthermore we estimate Γ(Υ{hooked}′→ggΥ{hooked})=(10±5) keV in agreement with QCD predictions using vector gluons while one would expect 100 keV with scalar gluons.

Original language	English
Pages (from-to)	95-100
Number of pages	6
Journal	Physics Letters B
Volume	100
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(81)90295-1
State	Published - 19 Mar 1981

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Niczyporuk, B., Zełudziewicz, T., Chen, K. W., Hartung, R., Folger, G., Lurz, B., Vogel, H., Volland, U., Wegener, H., Bienlein, J. K., Graumann, R., Krüger, J., Leissner, M., Schmitz, M., Heimlich, F. H., Nernst, R., Schwarz, A., Strohbusch, U., Trost, H. J., ... Scheer, M. (1981). Measurement of the decay Υ{hooked}′→Υ{hooked}π⁺π^-. Physics Letters B, 100(1), 95-100. https://doi.org/10.1016/0370-2693(81)90295-1

@article{d54dc2bbdb2c40c0ae3eb50c53ed6a7c,

title = "Measurement of the decay Υ{hooked}′→Υ{hooked}π+π- ",

abstract = "We report the first observation of the decay Υ{hooked}′→Υ{hooked}π+π- →l+l-π+π-. The 7 events seen yield a branching ratio B(Υ{hooked}′→Υ{hooked}π+π- )=(19±8)%. A consistent value of B=(26±13)% is obtained from the charged multiplicities of the Υ{hooked}′ and Υ{hooked} decays. Using these values we deduce Γtot(Υ{hooked}′)=(31+10-8 ) keV and Bee(Υ{hooked}′)=(1.8±0.5)%. Furthermore we estimate Γ(Υ{hooked}′→ggΥ{hooked})=(10±5) keV in agreement with QCD predictions using vector gluons while one would expect 100 keV with scalar gluons.",

author = "B. Niczyporuk and T. Ze{\l}udziewicz and Chen, {K. W.} and R. Hartung and G. Folger and B. Lurz and H. Vogel and U. Volland and H. Wegener and Bienlein, {J. K.} and R. Graumann and J. Kr{\"u}ger and M. Leissner and M. Schmitz and Heimlich, {F. H.} and R. Nernst and A. Schwarz and U. Strohbusch and Trost, {H. J.} and P. Zschorsch and A. Engler and Kraemer, {R. W.} and F. Messing and C. Rippich and B. Stacey and S. Youssef and A. Fridman and G. Alexander and A. Av-Shalom and G. Bella and Y. Gnat and J. Grunhaus and E. H{\"o}rber and W. Langguth and M. Scheer",

note = "Funding Information: i Partially supported by the US National Science Foundation. 2 Present address: MPI Munich, Germany. 3 Partially supported by the US Department of Energy. 4 Partially supported by the Israel Academy of Sciences and Humanities. s Present address: MBB Munich, Germany. 6 Present address: DESY, Hamburg, Germany.",

year = "1981",

month = mar,

day = "19",

doi = "10.1016/0370-2693(81)90295-1",

language = "אנגלית",

volume = "100",

pages = "95--100",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "1",

}

Niczyporuk, B, Zełudziewicz, T, Chen, KW, Hartung, R, Folger, G, Lurz, B, Vogel, H, Volland, U, Wegener, H, Bienlein, JK, Graumann, R, Krüger, J, Leissner, M, Schmitz, M, Heimlich, FH, Nernst, R, Schwarz, A, Strohbusch, U, Trost, HJ, Zschorsch, P, Engler, A, Kraemer, RW, Messing, F, Rippich, C, Stacey, B, Youssef, S, Fridman, A, Alexander, G, Av-Shalom, A, Bella, G, Gnat, Y, Grunhaus, J, Hörber, E, Langguth, W & Scheer, M 1981, 'Measurement of the decay Υ{hooked}′→Υ{hooked}π⁺π^-', Physics Letters B, vol. 100, no. 1, pp. 95-100. https://doi.org/10.1016/0370-2693(81)90295-1

TY - JOUR

T1 - Measurement of the decay Υ{hooked}′→Υ{hooked}π+π-

AU - Niczyporuk, B.

AU - Zełudziewicz, T.

AU - Chen, K. W.

AU - Hartung, R.

AU - Folger, G.

AU - Lurz, B.

AU - Vogel, H.

AU - Volland, U.

AU - Wegener, H.

AU - Bienlein, J. K.

AU - Graumann, R.

AU - Krüger, J.

AU - Leissner, M.

AU - Schmitz, M.

AU - Heimlich, F. H.

AU - Nernst, R.

AU - Schwarz, A.

AU - Strohbusch, U.

AU - Trost, H. J.

AU - Zschorsch, P.

AU - Engler, A.

AU - Kraemer, R. W.

AU - Messing, F.

AU - Rippich, C.

AU - Stacey, B.

AU - Youssef, S.

AU - Fridman, A.

AU - Alexander, G.

AU - Av-Shalom, A.

AU - Bella, G.

AU - Gnat, Y.

AU - Grunhaus, J.

AU - Hörber, E.

AU - Langguth, W.

AU - Scheer, M.

N1 - Funding Information: i Partially supported by the US National Science Foundation. 2 Present address: MPI Munich, Germany. 3 Partially supported by the US Department of Energy. 4 Partially supported by the Israel Academy of Sciences and Humanities. s Present address: MBB Munich, Germany. 6 Present address: DESY, Hamburg, Germany.

PY - 1981/3/19

Y1 - 1981/3/19

N2 - We report the first observation of the decay Υ{hooked}′→Υ{hooked}π+π- →l+l-π+π-. The 7 events seen yield a branching ratio B(Υ{hooked}′→Υ{hooked}π+π- )=(19±8)%. A consistent value of B=(26±13)% is obtained from the charged multiplicities of the Υ{hooked}′ and Υ{hooked} decays. Using these values we deduce Γtot(Υ{hooked}′)=(31+10-8 ) keV and Bee(Υ{hooked}′)=(1.8±0.5)%. Furthermore we estimate Γ(Υ{hooked}′→ggΥ{hooked})=(10±5) keV in agreement with QCD predictions using vector gluons while one would expect 100 keV with scalar gluons.

AB - We report the first observation of the decay Υ{hooked}′→Υ{hooked}π+π- →l+l-π+π-. The 7 events seen yield a branching ratio B(Υ{hooked}′→Υ{hooked}π+π- )=(19±8)%. A consistent value of B=(26±13)% is obtained from the charged multiplicities of the Υ{hooked}′ and Υ{hooked} decays. Using these values we deduce Γtot(Υ{hooked}′)=(31+10-8 ) keV and Bee(Υ{hooked}′)=(1.8±0.5)%. Furthermore we estimate Γ(Υ{hooked}′→ggΥ{hooked})=(10±5) keV in agreement with QCD predictions using vector gluons while one would expect 100 keV with scalar gluons.

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DO - 10.1016/0370-2693(81)90295-1

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AN - SCOPUS:0011565455

SN - 0370-2693

VL - 100

SP - 95

EP - 100

JO - Physics Letters B

JF - Physics Letters B

IS - 1

ER -

Measurement of the decay Υ{hooked}′→Υ{hooked}π⁺π^-

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