Comparisons of the properties of final state photons in hadronic Z0 decays with predictions from matrix element calculations

The OPAL Collaboration

doi:10.1007/BF01564818

Comparisons of the properties of final state photons in hadronic Z⁰ decays with predictions from matrix element calculations

The OPAL Collaboration

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

6 Scopus citations

Abstract

The properties of hadronic Z⁰ decays with final state photons, measured with OPAL at LEP, have been compared with predictions from two different matrix element calculations of O(αα_s). Two calculations, GNJETS and EEPRAD, have been investigated which use different schemes to restrict the phase space around the poles of the cross section. Assuming the E0-JADE jet definition, both calculations describe the data well in large regions of phase space for y_cut values around 0.06. For very large and very small jet-photon masses some deviations from the predictions have been found, indicating the importance of higher order corrections. Significant differences between the calculations are only apparent in the predicted rate of 1-jet plus photon events. The rate is higher in GNJETS which reproduces the data better than EEPRAD.

Original language	English
Pages (from-to)	15-26
Number of pages	12
Journal	European Physical Journal C
Volume	67
Issue number	1
DOIs	https://doi.org/10.1007/BF01564818
State	Published - 1 Mar 1995
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1007/BF01564818

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@article{50237dd47be0444aa9aabc256560c845,

title = "Comparisons of the properties of final state photons in hadronic Z0 decays with predictions from matrix element calculations",

abstract = "The properties of hadronic Z0 decays with final state photons, measured with OPAL at LEP, have been compared with predictions from two different matrix element calculations of O(ααs). Two calculations, GNJETS and EEPRAD, have been investigated which use different schemes to restrict the phase space around the poles of the cross section. Assuming the E0-JADE jet definition, both calculations describe the data well in large regions of phase space for ycut values around 0.06. For very large and very small jet-photon masses some deviations from the predictions have been found, indicating the importance of higher order corrections. Significant differences between the calculations are only apparent in the predicted rate of 1-jet plus photon events. The rate is higher in GNJETS which reproduces the data better than EEPRAD.",

author = "{The OPAL Collaboration} and R. Akers and G. Alexander and J. Allison and K. Ametewee and Anderson, {K. J.} and S. Arcelli and S. Asai and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and R. Bartoldus and Batley, {J. R.} and G. Beaudoin and A. Beck and Beck, {G. A.} and C. Beeston and T. Behnke and Bell, {K. W.} and G. Bella and S. Bentvelsen and P. Berlich and S. Bethke and O. Biebel and Bloodworth, {I. J.} and P. Bock and Bosch, {H. M.} and M. Boutemeur and S. Braibant and P. Bright-Thomas and Brown, {R. M.} and A. Buijs and Burckhart, {H. J.} and R. B{\"u}rgin and C. Burgard and N. Capdevielle and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and C. Charlesworth and Charlton, {D. G.} and Chu, {S. L.} and Clarke, {P. E.L.} and Clayton, {J. C.} and Clowes, {S. G.} and I. Cohen and R. Folman",

year = "1995",

month = mar,

day = "1",

doi = "10.1007/BF01564818",

language = "English",

volume = "67",

pages = "15--26",

journal = "European Physical Journal C",

issn = "0170-9739",

publisher = "Springer New York",

number = "1",

}

TY - JOUR

T1 - Comparisons of the properties of final state photons in hadronic Z0 decays with predictions from matrix element calculations

AU - The OPAL Collaboration

AU - Akers, R.

AU - Alexander, G.

AU - Allison, J.

AU - Ametewee, K.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Asai, S.

AU - Axen, D.

AU - Azuelos, G.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Bartoldus, R.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Beck, A.

AU - Beck, G. A.

AU - Beeston, C.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Bentvelsen, S.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Bosch, H. M.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brown, R. M.

AU - Buijs, A.

AU - Burckhart, H. J.

AU - Bürgin, R.

AU - Burgard, C.

AU - Capdevielle, N.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlesworth, C.

AU - Charlton, D. G.

AU - Chu, S. L.

AU - Clarke, P. E.L.

AU - Clayton, J. C.

AU - Clowes, S. G.

AU - Cohen, I.

AU - Folman, R.

PY - 1995/3/1

Y1 - 1995/3/1

N2 - The properties of hadronic Z0 decays with final state photons, measured with OPAL at LEP, have been compared with predictions from two different matrix element calculations of O(ααs). Two calculations, GNJETS and EEPRAD, have been investigated which use different schemes to restrict the phase space around the poles of the cross section. Assuming the E0-JADE jet definition, both calculations describe the data well in large regions of phase space for ycut values around 0.06. For very large and very small jet-photon masses some deviations from the predictions have been found, indicating the importance of higher order corrections. Significant differences between the calculations are only apparent in the predicted rate of 1-jet plus photon events. The rate is higher in GNJETS which reproduces the data better than EEPRAD.

AB - The properties of hadronic Z0 decays with final state photons, measured with OPAL at LEP, have been compared with predictions from two different matrix element calculations of O(ααs). Two calculations, GNJETS and EEPRAD, have been investigated which use different schemes to restrict the phase space around the poles of the cross section. Assuming the E0-JADE jet definition, both calculations describe the data well in large regions of phase space for ycut values around 0.06. For very large and very small jet-photon masses some deviations from the predictions have been found, indicating the importance of higher order corrections. Significant differences between the calculations are only apparent in the predicted rate of 1-jet plus photon events. The rate is higher in GNJETS which reproduces the data better than EEPRAD.

UR - http://www.scopus.com/inward/record.url?scp=0041326907&partnerID=8YFLogxK

U2 - 10.1007/BF01564818

DO - 10.1007/BF01564818

M3 - Article

AN - SCOPUS:0041326907

SN - 0170-9739

VL - 67

SP - 15

EP - 26

JO - European Physical Journal C

JF - European Physical Journal C

IS - 1

ER -

Comparisons of the properties of final state photons in hadronic Z⁰ decays with predictions from matrix element calculations

Abstract

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