Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region
An angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb[superscript −1], collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV dur...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2015
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| Online Access: | http://hdl.handle.net/1721.1/98242 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
| _version_ | 1811085955887529984 |
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| author | Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J |
| author_sort | Counts, Ian Thomas Hunt |
| collection | MIT |
| description | An angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb[superscript −1], collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012. For the first time several observables are measured in the dielectron mass squared (q[superscript 2]) interval between 0.002 and 1.120 GeV[superscript 2]/c[superscript 4]. The angular observables F [subscript L] and A [Re over T] which are related to the K[superscript *0] polarisation and to the lepton forward-backward asymmetry, are measured to be F [subscript L] = 0.16 ± 0.06 ± 0.03 and A [Re over T] = 0.10 ± 0.18 ± 0.05, where the first uncertainty is statistical and the second systematic. The angular observables A [(2) over T] and A [Im over T] which are sensitive to the photon polarisation in this q[superscript 2] range, are found to be A [(2) over T] = − 0.23 ± 0.23 ± 0.05 and A [Im over T] = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions. |
| first_indexed | 2024-09-23T13:18:28Z |
| format | Article |
| id | mit-1721.1/98242 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:18:28Z |
| publishDate | 2015 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/982422023-02-26T10:32:08Z Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Counts, Ian Thomas Hunt Ilten, Philip James Williams, Michael An angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb[superscript −1], collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012. For the first time several observables are measured in the dielectron mass squared (q[superscript 2]) interval between 0.002 and 1.120 GeV[superscript 2]/c[superscript 4]. The angular observables F [subscript L] and A [Re over T] which are related to the K[superscript *0] polarisation and to the lepton forward-backward asymmetry, are measured to be F [subscript L] = 0.16 ± 0.06 ± 0.03 and A [Re over T] = 0.10 ± 0.18 ± 0.05, where the first uncertainty is statistical and the second systematic. The angular observables A [(2) over T] and A [Im over T] which are sensitive to the photon polarisation in this q[superscript 2] range, are found to be A [(2) over T] = − 0.23 ± 0.23 ± 0.05 and A [Im over T] = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions. National Science Foundation (U.S.) 2015-08-26T12:36:27Z 2015-08-26T12:36:27Z 2015-04 2015-03 Article http://purl.org/eprint/type/JournalArticle 1029-8479 1126-6708 http://hdl.handle.net/1721.1/98242 Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, et al. “Angular Analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] Decay in the Low-q[superscript 2] Region.” J. High Energ. Phys. 2015, no. 4 (April 2015). © 2015 CERN, for the benefit of the LHCb Collaboration https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 en_US http://dx.doi.org/10.1007/jhep04(2015)064 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer-Verlag |
| spellingShingle | Counts, Ian Thomas Hunt Williams, Michael Ilten, Philip J Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region |
| title | Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region |
| title_full | Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region |
| title_fullStr | Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region |
| title_full_unstemmed | Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region |
| title_short | Angular analysis of the B[superscript 0] → K[superscript *0]e[superscript +]e[superscript −] decay in the low-q[superscript 2] region |
| title_sort | angular analysis of the b superscript 0 k superscript 0 e superscript e superscript decay in the low q superscript 2 region |
| url | http://hdl.handle.net/1721.1/98242 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
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