Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector
The ratio of branching ratios of the W boson to muons and electrons, RWμ/e=B(W→μν)/B(W→eν), has been measured using 140fb-1 of pp collision data at s=13 TeV collected with the ATLAS detector at the LHC, probing the universality of lepton couplings. The ratio is obtained from measurements of the tt¯...
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
SpringerOpen
2024
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| _version_ | 1826314634818224128 |
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| author | Aad, G Aakvaag, E Abbott, B Abdelhameed, S Abeling, K Abicht, NJ Abidi, SH Aboelela, M Aboulhorma, A Abramowicz, H Abreu, H Abulaiti, Y Acharya, BS Ackermann, A Bourdarios, CA Adamczyk, L Addepalli, SV Addison, MJ Adelman, J Adiguzel, A Adye, T Affolder, AA Afik, Y Agaras, MN Barr, AJ Bortoletto, D Bruckler, TL Celli, F Chen, M Conroy, EI Cooper-Sarkar, AM Draguet, MA Eberwein, GH Frost, JA Gallas, EJ Grundy, JC Gwenlan, C Harris, YT Hays, CP Hodkinson, BH Huffman, TB Iizawa, T Karava, K Koch, SF Li, Z Nagai, K Nedic, L Nickerson, RB Pacey, HA Rossi, E Ruggiero, A Schopf, E Shipsey, IPJ Smith, HA Sultan, DMS Viehhauser, GHA Weidberg, AR Yildirim, TP |
| author_facet | Aad, G Aakvaag, E Abbott, B Abdelhameed, S Abeling, K Abicht, NJ Abidi, SH Aboelela, M Aboulhorma, A Abramowicz, H Abreu, H Abulaiti, Y Acharya, BS Ackermann, A Bourdarios, CA Adamczyk, L Addepalli, SV Addison, MJ Adelman, J Adiguzel, A Adye, T Affolder, AA Afik, Y Agaras, MN Barr, AJ Bortoletto, D Bruckler, TL Celli, F Chen, M Conroy, EI Cooper-Sarkar, AM Draguet, MA Eberwein, GH Frost, JA Gallas, EJ Grundy, JC Gwenlan, C Harris, YT Hays, CP Hodkinson, BH Huffman, TB Iizawa, T Karava, K Koch, SF Li, Z Nagai, K Nedic, L Nickerson, RB Pacey, HA Rossi, E Ruggiero, A Schopf, E Shipsey, IPJ Smith, HA Sultan, DMS Viehhauser, GHA Weidberg, AR Yildirim, TP |
| author_sort | Aad, G |
| collection | OXFORD |
| description | The ratio of branching ratios of the W boson to muons and electrons, RWμ/e=B(W→μν)/B(W→eν), has been measured using 140fb-1 of pp collision data at s=13 TeV collected with the ATLAS detector at the LHC, probing the universality of lepton couplings. The ratio is obtained from measurements of the tt¯ production cross-section in the ee, eμ and μμ dilepton final states. To reduce systematic uncertainties, it is normalised by the square root of the corresponding ratio RZμμ/ee for the Z boson measured in inclusive Z→ee and Z→μμ events. By using the precise value of RZμμ/ee determined from e+e- colliders, the ratio RWμ/e is determined to be RWμ/e=0.9995±0.0022(stat)±0.0036(syst)±0.0014(ext).The three uncertainties correspond to data statistics, experimental systematics and the external measurement of RZμμ/ee, giving a total uncertainty of 0.0045, and confirming the Standard Model assumption of lepton flavour universality in W-boson decays at the 0.5% level. |
| first_indexed | 2024-12-09T03:10:17Z |
| format | Journal article |
| id | oxford-uuid:b3758ca2-7032-412a-b149-437430dc60f5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-12-09T03:10:17Z |
| publishDate | 2024 |
| publisher | SpringerOpen |
| record_format | dspace |
| spelling | oxford-uuid:b3758ca2-7032-412a-b149-437430dc60f52024-10-01T20:10:58ZPrecise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detectorJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b3758ca2-7032-412a-b149-437430dc60f5EnglishJisc Publications RouterSpringerOpen2024Aad, GAakvaag, EAbbott, BAbdelhameed, SAbeling, KAbicht, NJAbidi, SHAboelela, MAboulhorma, AAbramowicz, HAbreu, HAbulaiti, YAcharya, BSAckermann, ABourdarios, CAAdamczyk, LAddepalli, SVAddison, MJAdelman, JAdiguzel, AAdye, TAffolder, AAAfik, YAgaras, MNBarr, AJBortoletto, DBruckler, TLCelli, FChen, MConroy, EICooper-Sarkar, AMDraguet, MAEberwein, GHFrost, JAGallas, EJGrundy, JCGwenlan, CHarris, YTHays, CPHodkinson, BHHuffman, TBIizawa, TKarava, KKoch, SFLi, ZNagai, KNedic, LNickerson, RBPacey, HARossi, ERuggiero, ASchopf, EShipsey, IPJSmith, HASultan, DMSViehhauser, GHAWeidberg, ARYildirim, TPThe ratio of branching ratios of the W boson to muons and electrons, RWμ/e=B(W→μν)/B(W→eν), has been measured using 140fb-1 of pp collision data at s=13 TeV collected with the ATLAS detector at the LHC, probing the universality of lepton couplings. The ratio is obtained from measurements of the tt¯ production cross-section in the ee, eμ and μμ dilepton final states. To reduce systematic uncertainties, it is normalised by the square root of the corresponding ratio RZμμ/ee for the Z boson measured in inclusive Z→ee and Z→μμ events. By using the precise value of RZμμ/ee determined from e+e- colliders, the ratio RWμ/e is determined to be RWμ/e=0.9995±0.0022(stat)±0.0036(syst)±0.0014(ext).The three uncertainties correspond to data statistics, experimental systematics and the external measurement of RZμμ/ee, giving a total uncertainty of 0.0045, and confirming the Standard Model assumption of lepton flavour universality in W-boson decays at the 0.5% level. |
| spellingShingle | Aad, G Aakvaag, E Abbott, B Abdelhameed, S Abeling, K Abicht, NJ Abidi, SH Aboelela, M Aboulhorma, A Abramowicz, H Abreu, H Abulaiti, Y Acharya, BS Ackermann, A Bourdarios, CA Adamczyk, L Addepalli, SV Addison, MJ Adelman, J Adiguzel, A Adye, T Affolder, AA Afik, Y Agaras, MN Barr, AJ Bortoletto, D Bruckler, TL Celli, F Chen, M Conroy, EI Cooper-Sarkar, AM Draguet, MA Eberwein, GH Frost, JA Gallas, EJ Grundy, JC Gwenlan, C Harris, YT Hays, CP Hodkinson, BH Huffman, TB Iizawa, T Karava, K Koch, SF Li, Z Nagai, K Nedic, L Nickerson, RB Pacey, HA Rossi, E Ruggiero, A Schopf, E Shipsey, IPJ Smith, HA Sultan, DMS Viehhauser, GHA Weidberg, AR Yildirim, TP Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector |
| title | Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector |
| title_full | Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector |
| title_fullStr | Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector |
| title_full_unstemmed | Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector |
| title_short | Precise test of lepton flavour universality in W -boson decays into muons and electrons in pp collisions at s = 13 Te V with the ATLAS detector |
| title_sort | precise test of lepton flavour universality in w boson decays into muons and electrons in pp collisions at s 13 te v with the atlas detector |
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