Measurement of the W+W- gamma Cross Section and Direct Limits on Anomalous Quartic Gauge Boson Couplings at LEP.
- Acciarri, M
- Achard, P
- Adriani, O
- Aguilar Benitez, M
- Alcaraz, J
- Alemanni, G
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- Jones, LW
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- Leiste, R
- Levtchenko, P
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- Lin, CH
- Lin, WT
- Linde, FL
- Lista, L
- Liu, ZA
- Lohmann, W
- Longo, E
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- Lubelsmeyer, K
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- Lugnier, L
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- Lustermann, W
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- Metzger, WJ
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- Stickland, DP
- Stone, A
- Stoyanov, B
- Straessner, A
- Sudhakar, K
- Sultanov, G
- Sun, LZ
- Suter, H
- Swain, JD
- Szillasi, Z
- Sztaricskai, T
- Tang, XW
- Tauscher, L
- Taylor, L
- Tellili, B
- Timmermans, C
- Ting, SCC
- Ting, SM
- Tonwar, SC
- Toth, J
- Tully, C
- Tung, KL
- Uchida, Y
- Ulbricht, J
- Valente, E
- Vesztergombi, G
- Vetlitsky, I
- Vicinanza, D
- Viertel, G
- Villa, S
- Violini, P
- Vivargent, M
- Vlachos, S
- Vodopianov, I
- Vogel, H
- Vogt, H
- Vorobiev, I
- Vorobyov, AA
- Vorvolakos, A
- Wadhwa, M
- Wallraff, W
- Wang, M
- Wang, XL
- Wang, ZM
- Weber, A
- Weber, M
- Wienemann, P
- Wilkens, H
- Wu, SX
- Wynhoff, S
- Xia, L
- Xu, ZZ
- Yamamoto, J
- Yang, BZ
- Yang, CG
- Yang, HJ
- Yang, M
- Ye, JB
- Yeh, SC
- Zalite, A
- Zalite, Y
- Zhang, ZP
- Zhu, GY
- Zhu, RY
- Zichichi, A
- Zilizi, G
- Zimmermann, B
- Zoller, M.
- GUIDA, Michele
- QUARTIERI, Joseph
Publication date
January 2000
DOIAbstract
The process e(+)e(-)-->W(+)W(-)gamma is analysed using the data collected with the L3 detector at LEP at a centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 176.8 pb(-1). Based on a sample of 42 selected W+W- candidates containing an isolated hard photon, the W(+)W(-)gamma cross section, defined within phase-space cuts, is measured to be: sigma(WW gamma) = 290 +/- 80 +/- 16 fb, consistent with the Standard Model expectation. Including the process e(+)c(-)-->upsilongamma gamma, limits are derived on anomalous contributions to the Standard Model quartic vertices W(+)W(-)gamma gamma and W(+)W(-)Z gamma at 95% CL: -0.043 GeV-2 < a(0)/Lambda(2) < 0.043 GeV-2, -0.08 GeV-2 < a(c)/Lambda(2) < 0.13 GeV-2, -0.41 GeV-2 <...
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