IOP 2014 Joint HEPP & APP Group Meeting

Session

Parallel 1B

8 Apr 2014, 13:00

Windsor Building (Royal Holloway, University of London)

Conveners

Parallel 1B: Flavour Physics 1

• Session chair: Dr. Mitesh Patel

26. Search for the decay $\Lambda_b^0 \rightarrow \Lambda^0 \eta^{(\prime)}$ at LHCb

James Mccarthy (University of Birmingham (GB))

08/04/2014, 13:00

Flavour Physics and Beyond

contributed talk

Decays involving $\eta$ and $\eta\prime$ mesons are particularly interesting to theorists, as they allow some insight into the relatively poorly understood topic of $\eta-\eta\prime$ mixing. This subject has been covered extensively using decays of $B$ and $B_s$ mesons, however, no equivalent processes have been observed in the baryonic sector. This talk outlines the search for the rare...

27. Measurement of the differential branching fraction of the rare decay $\Lambda_{b} \to pK\mu\mu$ at LHCb

Mr Michael Kiss (STFC (RAL))

08/04/2014, 13:15

Flavour Physics and Beyond

contributed talk

Using the data from the LHCb experiment at CERN , the flavour structure of physics beyond standard model (SM) is probed using one of the rare B-decay channels, namely the $\Lambda_{b} \to pK\mu\mu$ decay. This decay occurs through a flavour changing neutral current process mediated by electroweak penguin and box diagrams in the SM. It is forbidden at the tree level and suppressed at the...

28. The analysis of $B^0\rightarrow K^{{\star}0}\mu\mu$ decays at including S-wave contributions at LHCb

Sam Cunliffe (Imperial College Sci., Tech. & Med. (GB))

08/04/2014, 13:30

Flavour Physics and Beyond

contributed talk

A status report for the analysis of $B^0\rightarrow K^{\star}(892)^{0} (\rightarrow K^+ \pi^-) \mu^+\mu^- $ decays at the LHCb detector at the LHC is presented. This process is the decay of a beauty meson to a vector meson final state and produces an angular distribution in the final state decay products. This angular distribution is highly sensitive to the contributions from Beyond Standard...

54. Rare B decays in ATLAS: results and most recent updates on the 2012 analyses

Cristiano Alpigiani

08/04/2014, 13:45

Flavour Physics and Beyond

contributed talk

Weak decays that are naturally suppressed in the Standard Model, such as processes with flavour-changing neutral-currents, are perfect for indirect searches of new physics. These decays allow us to investigate higher energy ranges with respect to direct searches thus representing a fundamental complementary tool. Results on the ATLAS search for the $B_s\rightarrow \mu^+\mu^-$ rare decay...

81. CP asymmetries in $B\rightarrow K^{(\star)}\mu\mu$ decays

Simon Robert Magee Wright (University of Cambridge (GB))

08/04/2014, 14:00

Flavour Physics and Beyond

contributed talk

Measurements of the direct $CP$ asymmetry, $A_{CP}$, and the $CP$ difference in the $\mu^+ \mu^-$ forward-backward asymmetry, $\Delta A_{FB}$, are made for the $B^{0} \rightarrow K^{\star{0}}\mu^+\mu^-$ and $B^+ \rightarrow K^+\mu^+\mu^-$ decay modes using $pp$ collision data corresponding to an integrated luminosity of 3$fb^{-1}$ collected by LHCb in 2011 and 2012. The respective control...

92. $B_{s}^{0} \rightarrow D_s^{(\ast)+} D_s^{(\ast)-}$ Decays in LHCb

Adrian Andrew Pritchard (University of Liverpool (GB))

08/04/2014, 14:15

Flavour Physics and Beyond

contributed talk

The decay of a $B_{s}^{0}$ meson to two oppositely charged $D_{s}$ mesons is one that is postulated to be almost exclusively CP even. Measuring the properties of this decay can therefore give important information about the behaviour of the $B_{s}^{0}$ system. This presentation will focus on the measurement of the inclusive branching fraction of $B_{s}^{0} \rightarrow D_s^{(\ast)+}...

137. Search for $B_s^0 \to \phi \pi^+ \pi^-$ and $B_d^0 \to \phi \pi^+ \pi^-$ decays in LHCb

Haofei Luo (University of Edinburgh (GB))

08/04/2014, 14:30

Flavour Physics and Beyond

contributed talk

Using 3fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s} = 7$ and 8 TeV by LHCb experiment in 2011 and 2012, first observation is made of the suppressed flavor changing neutral current (FCNC) decay mode $B_s^0 \to \phi (K^+ K^-) f_0(980) (\pi^+ \pi^-)$. In the $\pi^+ \pi^-$ invariant mass range below 1100 MeV/c$^2$, the branching ratio, using the reference decay $B_s^0 \to \phi \phi$, is...

145. Towards measurements of CKM parameters with loops and trees at LHCb

Mr Sam Hall (Imperial College London)

08/04/2014, 14:45

Flavour Physics and Beyond

contributed talk

Elements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix are accessible through a variety of processes. The Decay $B^+\!'\rightarrow D_s^+\phi$ is an annihilation diagram at tree level, which is sensitive to $V_{ub}$. While, contributions from the matrix element $V_{ts}$ are present in the loop level decays $B^+\!\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and ...

112. A measurement of the CP-violation parameter $\gamma$ from $B^{\pm}\rightarrow [hh]_{D}K^{\pm}$ decays

Mr Donal Hill (University of Oxford, LHCb Experiment)

08/04/2014, 15:00

Flavour Physics and Beyond

contributed talk

Determination of the CKM angle $\gamma = \mbox{arg}[-V_{ud} V_{ub}^{\star}/(V_{cd} V_{cb}^{\star})]$ is one of the key goals of the LHCb experiment. The cleanest method to access this weak phase is through measurements of $\gamma$-sensitive observables in $B^{\pm} \rightarrow DK^{\pm}$ and $B^{\pm} \rightarrow D\pi^{\pm}$ decays. The largest interference and asymmetries, and thus the greatest...