| LHCb Note | |
| Report number | LHCb-PUB-2016-016 ; CERN-LHCb-PUB-2016-016 |
| Title | Feasibility study of $K^0_{\rm S} \to \pi^+\pi^-e^+e^-$ at LHCb |
| Author(s) | Marin Benito, Carla (University of Barcelona (ES)) ; Garrido Beltran, Lluis (University of Barcelona (ES)) ; Cid Vidal, Xabier (Universidade de Santiago de Compostela (ES)) |
| Submitted by | lhcb.secretariat@cern.ch on 04 Oct 2016 |
| Subject category | Particle Physics - Experiment |
| Note type | PHYS |
| Accelerator/Facility, Experiment | CERN LHC ; LHCb |
| Abstract | The feasibility of observing the $K^0_{\rm S} \to \pi^+\pi^-e^+e^-$ decay at LHCb is studied using simulated and real data. During the Run I of the LHC, the yield of events expected per $\text {fb}^{-1}$ of $pp$ collisions at $\sqrt s=8~ \text {TeV}$ is found to be $N _{RunI}(K^0_{\rm S} \to \pi^+\pi^-e^+e^-) = 120^{+280}_ {-100}$. A dedicated trigger selection has been developed for the 2016 data-taking. The expected yield per $\text {fb}^{-1}$ in Run II is found to be $N _{RunII}(K^0_{\rm S} \to \pi^+\pi^-e^+e^-) = 120^{+280}_ {-100}$. A large signal yield, $N_{Upgrade}(K^0_{\rm S} \to \pi^+\pi^-e^+e^-) = (5.0 \pm 0.3) \times 10^4$ per $\text {fb}^{-1}$, is expected in the LHC upgrade phase. In the Run I data, the signal over background ratio is too low to observe the signal without any additional selection. The observation of this decay with this dataset would require the development of a further high-efficiency large-rejection selection, which is out of the scope of the present study. |
| Copyright/License | Preprint: (License: CC-BY-4.0) |
Corresponding record in: Inspire
Email contact(s) : carla.marin.benito@cern.ch
Rekord stworzony 2016-06-24, ostatnia modyfikacja 2018-06-11
