The inclusive cross section for the production of a single top quark in association with a boson is measured using of proton-proton collision data collected with the ATLAS detector at . Events containing two charged leptons and at least one jet identified as originating from a -quark are selected. A multivariate discriminant is constructed to separate the signal from the background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be , in good agreement with the Standard Model prediction. The measured cross section is used to extract a value for the left-handed form factor at the vertex times the Cabibbo-Kobayashi-Maskawa matrix element of .
Aad, G., et al. "Measurement of single top-quark production in association with a <math display='inline'> <mi>W</mi> </math> boson in <math display='inline'> <mi>p</mi> <mi>p</mi> </math> collisions at <math display='inline'> <msqrt> <mi>s</mi> </msqrt> <mo>=</mo> <mn>13</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </math> with the ATLAS detector." Physical Review. D., vol. 110, no. 7, Oct. 2024. https://doi.org/10.1103/PhysRevD.110.072010
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Ackermann, A., Adam Bourdarios, C., Adamczyk, L., Addepalli, S. V., Addison, M. J., ... Zwalinski, L. (2024). Measurement of single top-quark production in association with a <math display='inline'> <mi>W</mi> </math> boson in <math display='inline'> <mi>p</mi> <mi>p</mi> </math> collisions at <math display='inline'> <msqrt> <mi>s</mi> </msqrt> <mo>=</mo> <mn>13</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </math> with the ATLAS detector. Physical Review. D., 110(7). https://doi.org/10.1103/PhysRevD.110.072010
Aad, G., Aakvaag, E., Abbott, B., et al., "Measurement of single top-quark production in association with a <math display='inline'> <mi>W</mi> </math> boson in <math display='inline'> <mi>p</mi> <mi>p</mi> </math> collisions at <math display='inline'> <msqrt> <mi>s</mi> </msqrt> <mo>=</mo> <mn>13</mn> <mtext> </mtext> <mtext> </mtext> <mi>TeV</mi> </math> with the ATLAS detector," Physical Review. D. 110, no. 7 (2024), https://doi.org/10.1103/PhysRevD.110.072010
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 462, Issue 1-2https://doi.org/10.1016/S0168-9002(01)00089-4
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3https://doi.org/10.1016/S0168-9002(03)01368-8