Proton–proton collision data recorded by the ATLASdetectorin2011,atacentre-of-massenergyof7TeV, have been used for an improved determination of the W boson mass and a first measurement of the W-boson width at the LHC. Recent fits to the proton parton distribution functions are incorporated in the measurement procedure and an improved statistical method is used to increase the measurement precision. The measurement of the W-boson mass yields a value of mW = 80,366.5 ± 9.8 (stat.) ± 12.5 (syst.) MeV = 80,366.5 ± 15.9 MeV, and the width is measured as W = 2202±32(stat.)±34 (syst.) MeV = 2202 ± 47 MeV. The first uncertainty components are sta tistical and the second correspond to the experimental and physics-modelling systematic uncertainties. Both results are consistent with the expectation from fits to electroweak pre cision data. The present measurement of mW is compatible with and supersedes the previous measurement performed using the same data.

Null, N., Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., et al. (2024). Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at $$\sqrt{s}=7$$ TeV. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(12) [10.1140/epjc/s10052-024-13190-x].

Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at $$\sqrt{s}=7$$ TeV

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;Giuli, F.;
2024-01-01

Abstract

Proton–proton collision data recorded by the ATLASdetectorin2011,atacentre-of-massenergyof7TeV, have been used for an improved determination of the W boson mass and a first measurement of the W-boson width at the LHC. Recent fits to the proton parton distribution functions are incorporated in the measurement procedure and an improved statistical method is used to increase the measurement precision. The measurement of the W-boson mass yields a value of mW = 80,366.5 ± 9.8 (stat.) ± 12.5 (syst.) MeV = 80,366.5 ± 15.9 MeV, and the width is measured as W = 2202±32(stat.)±34 (syst.) MeV = 2202 ± 47 MeV. The first uncertainty components are sta tistical and the second correspond to the experimental and physics-modelling systematic uncertainties. Both results are consistent with the expectation from fits to electroweak pre cision data. The present measurement of mW is compatible with and supersedes the previous measurement performed using the same data.
2024
Pubblicato
Rilevanza internazionale
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Esperti anonimi
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
English
Con Impact Factor ISI
Null, N., Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., et al. (2024). Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at $$\sqrt{s}=7$$ TeV. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(12) [10.1140/epjc/s10052-024-13190-x].
Null, N; Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, Nj; Abidi, Sh; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulai...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/401583
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