| Title: |
Evidence for Longitudinally Polarized W Bosons in the Electroweak Production of Same-Sign W Boson Pairs in Association with Two Jets in pp Collisions at √s = 13 TeV with the ATLAS Detector |
| Authors: |
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, NJ; Abidi, SH; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abulaiti, Y; Acharya, BS; Ackermann, A; Adam Bourdarios, C; Adamczyk, L; Addepalli, SV; Addison, MJ; Adelman, J; Adiguzel, A; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Aggarwal, A; Agheorghiesei, C; Ahmadov, F; Ahuja, S; Ai, X; Aielli, G; Aikot, A; Ait Tamlihat, M; Aitbenchikh, B; Akbiyik, M; Åkesson, TPA; Akimov, AV; Akiyama, D; Akolkar, NN; Aktas, S; Alberghi, GL; Albert, J; Albicocco, P; Albouy, GL; Alderweireldt, S; Alegria, ZL; Aleksa, M; Aleksandrov, IN; Alexa, C; Alexopoulos, T; Alfonsi, F; Algren, M; Alhroob, M; Ali, B; Ali, HMJ; Ali, S; Alibocus, SW; Aliev, M; Alimonti, G; Alkakhi, W; Allaire, C; Allbrooke, BMM; Allen, JS; Allen, JF; Allport, PP; Aloisio, A; Alonso, F; Alpigiani, C; Alsolami, ZMK; Alvarez Fernandez, A; Alves Cardoso, M; Alviggi, MG; Aly, M; Amaral Coutinho, Y; Ambler, A; Amelung, C; Amerl, M; Ames, CG; Amezza, T; Amidei, D; Amini, B; Amirie, K; Amirkhanov, A; Amor Dos Santos, SP; Amos, KR; Amperiadou, D; An, S; Anastopoulos, C; Andeen, T; Anders, JK; Anderson, AC; Andreazza, A; Angelidakis, S; Angerami, A; Anisenkov, AV; Annovi, A; Antel, C; Antipov, E; Antonelli, M; Anulli, F; Aoki, M; Aoki, T |
| Publisher Information: |
American Physical Society (APS) |
| Publication Year: |
2025 |
| Collection: |
The University of Melbourne: Digital Repository |
| Description: |
This Letter reports the first evidence of electroweak production of same-sign W boson pairs where at least one of the W bosons is longitudinally polarized and the most stringent constraint to date for the production of two longitudinally polarized same-sign W bosons. The dataset used corresponds to an integrated luminosity of 140 fb^{-1} of proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the ATLAS detector during run 2 of the Large Hadron Collider. The study is performed in final states including two same-sign leptons (electrons or muons), missing transverse momentum, and at least two jets with a large invariant mass and a large rapidity difference. Two independent fits are performed targeting the production of same-sign W bosons with at least one, or two longitudinally polarized W bosons. The observed (expected) significance of the production with at least one longitudinally polarized W boson is 3.3 (4.0) standard deviations. An observed (expected) 95% confidence level upper limit of 0.45 (0.70) fb is reported on the fiducial production cross section of two longitudinally polarized same-sign W bosons. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| ISSN: |
0031-9007 |
| Relation: |
https://hdl.handle.net/11343/363627 |
| Availability: |
https://hdl.handle.net/11343/363627 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; CC-BY |
| Accession Number: |
edsbas.90160531 |
| Database: |
BASE |