Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector.

Physics

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https://doi.org/10.1016/S0370-2693(03)00660-9
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Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector. / DELPHI Collaboration, .; Abdallah, J.; Sopczak, A. et al.
In: Physics Letters B, Vol. 565, 17.07.2003, p. 76-86.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

DELPHI Collaboration, Abdallah, J, Sopczak, A & Borrisov, GEA 2003, 'Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector.', Physics Letters B, vol. 565, pp. 76-86. https://doi.org/10.1016/S0370-2693(03)00660-9

APA

DELPHI Collaboration, ., Abdallah, J., Sopczak, A., & Borrisov, G. . E. A. (2003). Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector. Physics Letters B, 565, 76-86. https://doi.org/10.1016/S0370-2693(03)00660-9

Vancouver

DELPHI Collaboration, Abdallah J, Sopczak A, Borrisov GEA. Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector. Physics Letters B. 2003 Jul 17;565:76-86. doi: 10.1016/S0370-2693(03)00660-9

Author

DELPHI Collaboration, . ; Abdallah, J. ; Sopczak, A. et al. / Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector. In: Physics Letters B. 2003 ; Vol. 565. pp. 76-86.

Bibtex

@article{27666bfa88bd41b3bace0f7925f158db,

title = "Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector.",

abstract = "Inclusive J/ψ production in photon–photon collisions has been observed at LEP II beam energies. A clear signal from the reaction γγ→J/ψ+X is seen. The number of observed N(J/ψ→μ+μ−) events is 36±7 for an integrated luminosity of 617 pb−1, yielding a cross-section of σ(J/ψ+X)=45±9(stat)±17(syst) pb. Based on a study of the event shapes of different types of γγ processes in the PYTHIA program, we conclude that (74±22)% of the observed J/ψ events are due to {\textquoteleft}resolved{\textquoteright} photons, the dominant contribution of which is most probably due to the gluon content of the photon.",

author = "{DELPHI Collaboration}, . and J. Abdallah and A. Sopczak and Borrisov, {G. , et al.}",

year = "2003",

month = jul,

day = "17",

doi = "10.1016/S0370-2693(03)00660-9",

language = "English",

volume = "565",

pages = "76--86",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "ELSEVIER SCIENCE BV",

}

RIS

TY - JOUR

T1 - Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector.

AU - DELPHI Collaboration, .

AU - Abdallah, J.

AU - Sopczak, A.

AU - Borrisov, G. , et al.

PY - 2003/7/17

Y1 - 2003/7/17

N2 - Inclusive J/ψ production in photon–photon collisions has been observed at LEP II beam energies. A clear signal from the reaction γγ→J/ψ+X is seen. The number of observed N(J/ψ→μ+μ−) events is 36±7 for an integrated luminosity of 617 pb−1, yielding a cross-section of σ(J/ψ+X)=45±9(stat)±17(syst) pb. Based on a study of the event shapes of different types of γγ processes in the PYTHIA program, we conclude that (74±22)% of the observed J/ψ events are due to ‘resolved’ photons, the dominant contribution of which is most probably due to the gluon content of the photon.

AB - Inclusive J/ψ production in photon–photon collisions has been observed at LEP II beam energies. A clear signal from the reaction γγ→J/ψ+X is seen. The number of observed N(J/ψ→μ+μ−) events is 36±7 for an integrated luminosity of 617 pb−1, yielding a cross-section of σ(J/ψ+X)=45±9(stat)±17(syst) pb. Based on a study of the event shapes of different types of γγ processes in the PYTHIA program, we conclude that (74±22)% of the observed J/ψ events are due to ‘resolved’ photons, the dominant contribution of which is most probably due to the gluon content of the photon.

U2 - 10.1016/S0370-2693(03)00660-9

DO - 10.1016/S0370-2693(03)00660-9

M3 - Journal article

VL - 565

SP - 76

EP - 86

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

ER -

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