LHCb; b quark; Semileptonic B-hadron decays; new physics; pp collisions; CKM Matrix; Standard Model; CP violation; LHC; B meson
Böer Philipp, Bordone Marzia, Graverini Elena, Owen Patrick, Rotondo Marcello, van Dyk Danny (2018), Testing lepton flavour universality in semileptonic Λb → Λc* decays, in
Journal of High Energy Physics, 2018(6), 155-155.
Aaij R., Adeva B., Adinolfi M., Ajaltouni Z., Akar S., Albrecht J., Alessio F., Alexander M., Alfonso Albero A., Ali S., Alkhazov G., Alvarez Cartelle P., Alves A. A., Amato S., Amerio S., Amhis Y., An L., Anderlini L., Andreassi G., Andreotti M., Andrews J. E., Appleby R. B., Archilli F., d’Argent P., et al. (2018), First measurement of the CP-violating phase ϕ s d d ¯ $$ {\phi}_s^{d\overline{d}} $$ in Bs0 → (K+π−)(K−π+) decays, in
Journal of High Energy Physics, 2018(3), 140-140.
Aaij R., Adeva B., Adinolfi M., Ajaltouni Z., Akar S., Albrecht J., Alessio F., Alexander M., Alfonso Albero A., Ali S., Alkhazov G., Alvarez Cartelle P., Alves A.A., Amato S., Amerio S., Amhis Y., An L., Anderlini L., Andreassi G., Andreotti M., Andrews J.E., Appleby R.B., Archilli F., d'Argent P., et al. (2018), First observation of forward Z→bb¯ production in pp collisions at s=8 TeV, in
Physics Letters B, 776, 430-439.
Aaij R., Adeva B., Adinolfi M., Ajaltouni Z., Akar S., Albrecht J., Alessio F., Alexander M., Ali S., Alkhazov G., Alvarez Cartelle P., Alves A. A., Amato S., Amerio S., Amhis Y., An L., Anderlini L., Andreassi G., Andreotti M., Andrews J. E., Appleby R. B., Archilli F., d’Argent P., Arnau Romeu J., et al. (2017), Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays, in
Journal of High Energy Physics, 2017(8), 55-55.
Aaij R., Adeva B., Adinolfi M., Ajaltouni Z., Akar S., Albrecht J., Alessio F., Alexander M., Ali S., Alkhazov G., Alvarez Cartelle P., Alves A.A., Amato S., Amerio S., Amhis Y., An L., Anderlini L., Andreassi G., Andreotti M., Andrews J.E., Appleby R.B., Archilli F., d'Argent P., Arnau Romeu J., et al. (2017), Measurement of forward tt‾ , W+bb¯ and W+cc¯ production in pp collisions at s=8 TeV, in
Physics Letters B, 767, 110-120.
In contrast to direct searches at colliders, which are excluding several of what we thought were the best candidates to complete the Standard Model (SM), at present there are three anomalies in the flavour sector which are attracting large attention in the particle physics community. These anomalies might have a common new physics explanation. They consist of the angular observable P5' in the decay B->K*mm, measured by LHCb; the ratio of branching ratios RK, measured by LHCb; and the ratio of branching ratios of the semileptonic decays R(D(*)) , measured by the BaBar, Belle and LHCb collaborations. It is evident that the LHCb experiment is having a huge impact in the field. In addition to rapidly improving the measurements of the B-factories, LHCb is now exploring new intriguing territories in the landscape of flavour physics. Our group is one of the leading groups in the LHCb experiment in physics analysis, operation of the detector and hardware. For this reason we have had several important management roles within the collaboration during the years, including several working group convenerships and chair of collaboration board and speaker bureau.We were involved in the analysis of P5' (in collaboration with the Group of Prof. Serra at UZH). We had a major role in the electroweak forward physics at LHCb, thanks to the effort of Dr. K. Muller. In addition, we had an important role in the measurement of the branching ratio of the decay Bs->mm, which was one of the most anticipated measurements at LHC. The main focus of the coming years concerning the analysis will be a set of measurements that will allow to shed light into one of the most intriguing puzzles of experimental particle physics at the moment, i.e. the R(D()) anomaly, which at present deviates from the SM prediction about 4sigmas. Concerning the operation of the LHCb detector, we are deeply involved in the running of the current LHCb experiment. First of all Dr. B. Storaci is the Operation Coordinator (OC) of the LHCb experiment which is a key responsibility. The OC has to assure that all the acquisition chain of data in the experiment functions properly. They supervise all steps of the data taking, from the raw data taken in the pit to the calibration and the preselection (known as “stripping” inside the LHCb experiment) that delivers the data for all analyses. Therefore, it is often the case that problems of various nature have to be solved in a timely and efficient way. In addition, being the group that built the Tracker Turicensis (TT), we are participating in the operation and continuous monitoring of the Silicon Tracker of LHCb. We will continue with these responsibilities for the rest of RUN2. Finally, we are involved in the upgrade of the LHCb experiment, in particular in the design and construction of the Upstream Tracker (UT), which will be crucial for the trigger. In the UT project we are involved in tests of silicon sensors and readout electronics.With this SNF request we ask for the prolongation of our two postdoctoral researchers (Dr. M. Chrzaszcz and Dr. B. Storaci) and funding for four Ph.D. students. This will allow Mr. A. Weiden and Ms. E. Graverini to complete their Ph.D. and will allow the replacement of Mr. E. Bowen and Mr. M. Tresch who will graduate by the end of 2017. This request will not only allow us to keep the commitments we have in the LHCb experiment, but also to have a large impact in the physics analysis. In particular, we will focus on a set of measurements that will clarify the current = anomaly in semileptonic decays (R(D)). It is important to mention Prof. U. Straumann will retire the 31st July 2018, the Department of Physics of the University of Zurich is actively looking for a successor who will continue this LHCb research program. A candidate has already been selected and the procedure will shortly conclude, presumably early in 2017. This will assure continuity to the group and to the research program of LHCb at University of Zurich. This SNF funding request is therefore crucial to guarantee that our group does not lose the leading role in the LHCb experiment that we achieved during the years.