FLAVOUR IN THE ERA OF THE LHC andries van der schaaf a workshop on - PowerPoint PPT Presentation

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf a workshop on the interplay of flavour and collider physics http://mlm.home.cern.ch/mlm/FlavLHC.html goal of the workshop outline and document a programme for flavour physics for the next decade addressing in particular: the complementarity and synergy between the LHC and the flavour factories vis a vis the discovery and exploration potential for new physics. format of the workshop 2005/7 opening and closing meetings with plenary and three parallel sessions 2006 three meetings with parallel sessions 2007 CERN Yellow Report some 350 presentations by experts and many discussion sessions impossible to review! Z¨ urich, November 29, 2006 1/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf Programs of the three working groups: - WG1: Collider aspects of flavour physics at high Q . Explore/document the potential of ATLAS/CMS for BSM flavour studies. . Identify observables which discriminate between different models. - WG2: B/D/K decays . Compare experiments for which input parameters are similar or differences are understood. . Go beyond the existing Tevatron-B/SuperBelle/SuperBaBar working reports: . Investigate new approaches. - WG3: Flavour in the lepton sector, EDMs, g-2 . Review the status of, and address the complementarity between, neutrino physics, cosmologi- cal observations and low energy lepton flavour experiments on one hand, and LHC experiments on the other hand. Z¨ urich, November 29, 2006 2/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf WG1: Collider aspects of flavour physics at high Q Flavour phenomena in top Physics anomalous charged Top couplings (tbW) FCNC corrections to tt and single Top productions electroweak precision tests (Top, W, Higgs) SUSY ’flavour’ identification of squarks and sleptons at the LHC impact of lepton flavour violation on flavour conserving observables find observables useful to identify the flavour structure of squark and sleptons lepton number and R-parity violation work out in detail the connections to low energy physics, e.g. µ → eγ , b → sγ , B s → µ + µ − can flavour observables discriminate between SUSY and other models ? non SUSY are there flavour signals from new states consistent with the bounds from low energy experiments ? work out in detail the correlations between these signals to low energy physics are there flavour observables which discriminate between the various models ? Tools plans to extend existing tools these to investigate flavour aspects extension of the SUSY Les Houches Accord (SLHA) to include flavour, CP and R-parity violation investigate possibilities to create a SLHA equivalent for other BSM models than SUSY needs of experimentalists Z¨ urich, November 29, 2006 3/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf WG2: B/D/K decays New Physics Scenarios model-independent approach, discussions on MFV/nonMFV SUSY models non-SUSY Hadronic Uncertainties charmless two-body B decays Light-cone QCD sum rules Lattice QCD New Physics in Benchmark Channels benchmark channels: radiative penguin decays, electroweak penguin decays, neutrino modes, very rare decays, UT angles (tree-dominated), B s − B s mixing, b → s and b → d , K decays, charm decays Prospects for existing and future facilities: SuperB, LHCb-upgrade, ... Assessments flavour benchmark points NMFV points close to SPS1a MFV large tan β SUSY-GUT including lepton physics collider phenomenology with flavor benchmarks (studies at CMS, ATLAS) discrimination of models Z¨ urich, November 29, 2006 4/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf WG3: Flavour in the lepton sector (theoretical part) Theoretical framework and observables Effective operators in the Standard Model Low scale observables in terms of effective operators LFV and CPV observables at colliders Leptogenesis and cosmological observations Correlations and complementarity between low and high scale observables Theory of flavour Phenomenological parametrizations of quark and lepton Yukawa couplings Minimal LFV Implications of GUTs on Yukawa flavour structure Models of flavour Higher-dimensional approaches Phenomenology of theories beyond the Standard Model FV in Non-SUSY extensions of the SM Multi-Higgs doublet, Low-scale singlet seesaw, Low-scale triplet seesaw, Extra dimensions FV in SUSY extensions of the SM Sources of LFV and CPV in SUSY, Mass insertion approximation, LFV and CPV in SUSY seesaw, Split SUSY, R-parity violation, Higgs-mediated LFV, Lepton universality, LFV, CPV and Leptogenesis, Correlations between EDMs and LFV observables SUSY GUTs Minimal SU(5) + NR, Minimal SU(5) + triplet, Minimal SO(10), LFV, QFV and CPV observables in GUTs and their correlations Z¨ urich, November 29, 2006 5/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf WG3: Flavour in the lepton sector (experimental part) LFV rare µ decays µ → eγ , µ − e conversion, µ → 3 e τ decays Babar/Belle, LHC B → µe in flight conversions EDM’s and g-2 EDM’s neutron, electron, deuteron, nuclei g-2 µ , electron Symmetry tests µ decay τ decay positronium decay e + e − → τ + τ − lepton universality π decay K decay τ decay Z¨ urich, November 29, 2006 6/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf Contents 1 Violation of lepton family number 8 µ decay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 τ decay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 B → µe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 in flight µ → τ conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2 EDM’s 19 neutron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 deuteron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3 Lepton universality 26 π decay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 K decay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Z¨ urich, November 29, 2006 7/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf 1 Violation of lepton family number µ decay µ → eγ - present limit 1 . 2 × 10 − 11 (90% C.L.) - MEG at PSI aims at an improvement by ≈ 100 - limited by accidental coincidences - waiting for cryostat of Xe detector - time resolution 0.15 ns fwhm - e + spectrum from µ → eνν flat - angular resolution by scattering in tar- get 19 mrad fwhm - E γ resolution 4.8% fwhm Z¨ urich, November 29, 2006 8/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf µ − 3 e - old SINDRUM result: B < 10 − 12 - background free - factor 100 should be possible - usually less constraining than µ → eγ accidentals mainly involve Bhabha e + e − pairs additional constraints from vertex total momentum versus total energy Z¨ urich, November 29, 2006 9/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf µ − e conversion Z¨ urich, November 29, 2006 10/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf - background from decay in orbit and pions in the beam - pions stop 10 m before the spectrometer but still some background is seen radiative π − capture followed by e − and e + scattering off the target - MECO planned to reach 10 − 16 using pulsed beam and large acceptance transport solenoids - project is presently considered at Fermilab Z¨ urich, November 29, 2006 11/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf τ decay Babar/Belle - e + e − → τ + τ − - one tau used as tag, the other to search for the decay - signal is searched in invariant mass and missing energy Z¨ urich, November 29, 2006 12/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf background sets in at the level of 10 − 7 Z¨ urich, November 29, 2006 13/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf Z¨ urich, November 29, 2006 14/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf LHC CMS simulation of a τ → 3 µ event Z¨ urich, November 29, 2006 15/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf B → µe - has been studied by LHCb - could be mediated by Pati-Salam leptoquarks which treats lepton number as a fourth color. - kinematically similar to the well studied decay B → µ + µ − Z¨ urich, November 29, 2006 16/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf Z¨ urich, November 29, 2006 17/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf in flight µ → τ conversions - has been studied within MSSM: S. Kanemura, Y. Kuno, M. Kuze and T. Ota, Search for lepton flavor violating mu µ → τX reactions with high energy muons Nucl. Phys. Proc. Suppl. 144 (2005) 268. - experimentally it looks challenging in the negative neaning of the word: - 10 11 µ s − 1 with low duty cycle on the detec- tor Z¨ urich, November 29, 2006 18/41

FLAVOUR IN THE ERA OF THE LHC andries van der schaaf 2 EDM’s permanent EDM’s - violate P and T invariance and thus CP - may be sizeable in many models beyond the SM - affect the spin precession frequency in external fields: hν = 2( µ · B + edm · E ) when reversing E the frequency shifts: present limits h ∆ ν = 4 · edm · E sensitivities for same model parameters Z¨ urich, November 29, 2006 19/41