Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$
A search for the $C\!P$-violating strong decays $\eta \to \pi^+\pi^-$ and $\eta^\prime(958) \to \pi^+\pi^-$ has been performed using approximately $2.5 \times 10^{7}$ events of each of the decays $D^+ \to \pi^+\pi^+\pi^-$ and $D_s^+ \to \pi^+\pi^+\pi^-$, recorded by the LHCb experiment. The data set...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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Elsevier
2016
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| _version_ | 1797062671607005184 |
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| author | Aaij, R Adeva, B Adinolfi, M Cheung, S Evans, T Gandini, P Cazon, B Hadavizadeh, T Harnew, N Hill, D Hussain, N Jalocha, J John, M Lupton, O Malde, S Nandi, A Qian, W Rollings, A Stevenson, S Topp-Joergensen, S Veneziano, G Wilkinson, G LHCb Collaboration |
| author_facet | Aaij, R Adeva, B Adinolfi, M Cheung, S Evans, T Gandini, P Cazon, B Hadavizadeh, T Harnew, N Hill, D Hussain, N Jalocha, J John, M Lupton, O Malde, S Nandi, A Qian, W Rollings, A Stevenson, S Topp-Joergensen, S Veneziano, G Wilkinson, G LHCb Collaboration |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | A search for the $C\!P$-violating strong decays $\eta \to \pi^+\pi^-$ and $\eta^\prime(958) \to \pi^+\pi^-$ has been performed using approximately $2.5 \times 10^{7}$ events of each of the decays $D^+ \to \pi^+\pi^+\pi^-$ and $D_s^+ \to \pi^+\pi^+\pi^-$, recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0 fb$^{-1}$ of $pp$ collision data recorded during LHC Run 1 and 0.3 fb$^{-1}$ recorded in Run 2. No evidence is seen for $D^+_{(s)} \to \pi^+ \eta^{(\prime)}$ with $\eta^{(\prime)} \to \pi^+\pi^-$, and upper limits at 90% confidence level are set on the branching fractions, $\mathcal{B}(\eta \to \pi^+\pi^-) < 1.6 \times 10^{-5}$ and $\mathcal{B}(\eta^\prime \to \pi^+\pi^-) < 1.8 \times 10^{-5}$. The limit for the $\eta$ decay is comparable with the existing one, while that for the $\eta^\prime$ is a factor of three smaller than the previous limit. |
| first_indexed | 2024-03-06T20:48:54Z |
| format | Journal article |
| id | oxford-uuid:36e5820e-1bae-4a5b-8542-bfa2cce51752 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:48:54Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:36e5820e-1bae-4a5b-8542-bfa2cce517522022-03-26T13:40:45ZSearch for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:36e5820e-1bae-4a5b-8542-bfa2cce51752Symplectic Elements at OxfordElsevier2016Aaij, RAdeva, BAdinolfi, MCheung, SEvans, TGandini, PCazon, BHadavizadeh, THarnew, NHill, DHussain, NJalocha, JJohn, MLupton, OMalde, SNandi, AQian, WRollings, AStevenson, STopp-Joergensen, SVeneziano, GWilkinson, GLHCb CollaborationA search for the $C\!P$-violating strong decays $\eta \to \pi^+\pi^-$ and $\eta^\prime(958) \to \pi^+\pi^-$ has been performed using approximately $2.5 \times 10^{7}$ events of each of the decays $D^+ \to \pi^+\pi^+\pi^-$ and $D_s^+ \to \pi^+\pi^+\pi^-$, recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0 fb$^{-1}$ of $pp$ collision data recorded during LHC Run 1 and 0.3 fb$^{-1}$ recorded in Run 2. No evidence is seen for $D^+_{(s)} \to \pi^+ \eta^{(\prime)}$ with $\eta^{(\prime)} \to \pi^+\pi^-$, and upper limits at 90% confidence level are set on the branching fractions, $\mathcal{B}(\eta \to \pi^+\pi^-) < 1.6 \times 10^{-5}$ and $\mathcal{B}(\eta^\prime \to \pi^+\pi^-) < 1.8 \times 10^{-5}$. The limit for the $\eta$ decay is comparable with the existing one, while that for the $\eta^\prime$ is a factor of three smaller than the previous limit. |
| spellingShingle | Aaij, R Adeva, B Adinolfi, M Cheung, S Evans, T Gandini, P Cazon, B Hadavizadeh, T Harnew, N Hill, D Hussain, N Jalocha, J John, M Lupton, O Malde, S Nandi, A Qian, W Rollings, A Stevenson, S Topp-Joergensen, S Veneziano, G Wilkinson, G LHCb Collaboration Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$ |
| title | Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$ |
| title_full | Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$ |
| title_fullStr | Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$ |
| title_full_unstemmed | Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$ |
| title_short | Search for the $C\!P$-violating strong decays $η\to π^+π^-$ and $η^\prime(958) \to π^+π^-$ |
| title_sort | search for the c p violating strong decays η to π π and η prime 958 to π π |
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