Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders
We propose a novel test to assess the unitarity of the Cabibbo-Kobayashi-Maskawa matrix, VCKM, at present and future collider experiments. Our strategy makes use of the W+W− production cross section to directly probe the VCKM†VCKM product, which regulates the high-energy behavior of the observable....
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324006646 |
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| author | E. Gabrielli L. Marzola K. Müürsepp |
| author_facet | E. Gabrielli L. Marzola K. Müürsepp |
| author_sort | E. Gabrielli |
| collection | DOAJ |
| description | We propose a novel test to assess the unitarity of the Cabibbo-Kobayashi-Maskawa matrix, VCKM, at present and future collider experiments. Our strategy makes use of the W+W− production cross section to directly probe the VCKM†VCKM product, which regulates the high-energy behavior of the observable. The violation of unitarity is signaled by an anomalous behavior of the cross section that grows quadratically with the W+W− invariant mass with respect to the Standard Model prediction. By using the recent ATLAS measurements of the W+W− cross section we are able to constrain the maximal unitarity violation allowed by current data, producing a bound complementary to the results of flavor physics experiments. Forecasts for the high luminosity phase of the LHC and for the future 100 TeV hadron collider are also discussed. |
| format | Article |
| id | doaj-art-46baa3e3a0a643769b1c1633d5ddaaca |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-46baa3e3a0a643769b1c1633d5ddaaca2024-11-30T07:08:51ZengElsevierPhysics Letters B0370-26932024-12-01859139106Testing the CKM unitarity at high energy via the W+W− production at the LHC and future collidersE. Gabrielli0L. Marzola1K. Müürsepp2Physics Department, University of Trieste, Strada Costiera 11, I-34151 Trieste, Italy; INFN, Sezione di Trieste, Via Valerio 2, I-34127 Trieste, Italy; Laboratory of High-Energy and Computational Physics, NICPB, Rävala pst 10, 10143 Tallinn, Estonia; Corresponding author.Laboratory of High-Energy and Computational Physics, NICPB, Rävala pst 10, 10143 Tallinn, Estonia; Institute of Computer Science, University of Tartu, Narva mnt 18, 51009 Tartu, EstoniaLaboratory of High-Energy and Computational Physics, NICPB, Rävala pst 10, 10143 Tallinn, EstoniaWe propose a novel test to assess the unitarity of the Cabibbo-Kobayashi-Maskawa matrix, VCKM, at present and future collider experiments. Our strategy makes use of the W+W− production cross section to directly probe the VCKM†VCKM product, which regulates the high-energy behavior of the observable. The violation of unitarity is signaled by an anomalous behavior of the cross section that grows quadratically with the W+W− invariant mass with respect to the Standard Model prediction. By using the recent ATLAS measurements of the W+W− cross section we are able to constrain the maximal unitarity violation allowed by current data, producing a bound complementary to the results of flavor physics experiments. Forecasts for the high luminosity phase of the LHC and for the future 100 TeV hadron collider are also discussed.http://www.sciencedirect.com/science/article/pii/S0370269324006646 |
| spellingShingle | E. Gabrielli L. Marzola K. Müürsepp Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders Physics Letters B |
| title | Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders |
| title_full | Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders |
| title_fullStr | Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders |
| title_full_unstemmed | Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders |
| title_short | Testing the CKM unitarity at high energy via the W+W− production at the LHC and future colliders |
| title_sort | testing the ckm unitarity at high energy via the w w production at the lhc and future colliders |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324006646 |
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