LHCb Physics Program

Physics with bottom quarks: The LHCb experimentMarcel MerkNikhef and the Free UniversityJan 20, 2009

Contents: Physics with b-quarks CP Violation The LHCb ExperimentPhysics@FOM Veldhoven 2009. Focus Session F01: The start-up of the LHC at CERN

LHCb @ LHC

CMSALICEATLASLHCbCERN

Lumi is a factor 50 to 20 below peak design lumi of General Purpose Detectors (GPD) defocussing beams2LHC: Search for physics beyond Standard Model31-3-20083 Atlas/CMS: direct observation of new particles LHCb: observation of new particles in quantum loops

LHCb is aiming at search for new physics in CP violation and Rare DecaysFocus of this talkAtlasCMSLHCbApproach of Atlas and CM is to search for new particles by producing them in the final state Requires highest energy of the collider. The approach of LHCb is to look for the same new physics, by investigating their effect in quantum loops. The aim of LHCb (like Atlas and CMS) is to search for physics beyond the SM. In particular to study the CP violating aspects of it as well as the production modes of final states that are suppressed in the SM; so-called rare decays. Equally important but in this talk I concentrate on the CP violating aspects. 3Flavour physics with 3 generations of fermions31-3-20084udcstbIIIIIIetmnenmntquarksleptons~01777106~0~00.51112043001763001200~7~3

LEP 12 neutrinos3 neutrinos4 neutrinosmeasurementsBeam energy (GeV)Cross sectionNote: In the Standard Model 3 generations of Dirac particles is the minimum requirement to create a matter - antimatter asymmetry (CP violation).(masses in MeV)As an introduction: flavour physics of the weak interaction is an interaction between quarks of different type. Here are the fermions of nature ordered according to their interaction. 1) Note the increasing masses of the quarks. Origin unknown. 2) 3 families (LEP 1) ->just enough for CP Violation, i.e. a matter-antimatter asymmetry in the weak interaction.4Interactions between QuarksCabibbo described V-A quark interactions with flavour changing charged currents: quark mixing

Nicola Cabibbou d , sWgweakJ+Interactions between QuarksCabibbo described V-A quark interactions with flavour changing charged currents: quark mixing

Kobayashi and Maskawa predicted in 1972 the 3rd quark generation to explain CP-Violation within the Standard Model Nobel Prize 2008 (shared with Nambu)Nicola CabibboMakoto KobayashiToshihide Maskawau , c , td , s , bWgweakJ+Matter Antimattergweakg*weak9 Coupling constants:gweak g VCKMThe CKM Matrix VCKM31-3-20087

d s bu

c

tThis is the three by three matrix. It represents the strength with which the different quark flavours couple to the W boson.7The CKM Matrix VCKM31-3-20088

dbdcVcbTypical B-meson ( ) decay diagram:The B-meson has a relatively long lifetime of 1.5 psRelated to mass hierarchy?WudMention the hierarchy in the values of the CKM elements. Not understood. Is there a relation with the mass hierarchy? To first order the matrix is diagonal, the off diagonal elements are suppressed: Cabibbo suppression. Diagram of a B-meson decay. Since the coupling Vcb is small the lifetime of B-mesons is relatively large. One of the interesting aspects of B-physics.8The CKM Matrix VCKM31-3-20089

From unitarity (VCKM VCKM=1) :CKM has four free parameters: 3 real: l (0.22) , A ( 1), r 1 imaginary: ih

Particle Antiparticle: Vij Vij*=> 1 CP Violating phase!Wolfenstein parametrization: VCKM

Mr Wolfenstein has parametrized the matrix as an expansion in order of a parameter lambda using the fact that it is unitary. Using unitarity it can be seen that the matrix has four free parameters: 3 can be chosen as rotattion angles in a 3 dimension generation space. The fourth parameter is a complex phase: here parametrized as a imaginary number i-eta. Since in the interactions particle couple according to the complex conjugate of the coupling constant the complex phase allows for a different interaction between particles and anti-particles. In fact, in the Standard Model this single phase is the only difference between particles and anti-particles.9The CKM Matrix VCKM31-3-200810

From unitarity (VCKM VCKM=1) :CKM has four free parameters: 3 real: l (0.22) , A ( 1), r 1 imaginary: ih

Particle Antiparticle: Vij Vij*=> 1 CP Violating phase!Wolfenstein parametrization: VCKM

Benchmark Example: BsDs K31-3-200811

Here is a Feynman diagram indicating why Bs->Ds K is sensitive to angle gamma, due to the fact that there is a Vub coupling involved.11

Benchmark Example: BsDs K31-3-200812

But how can we observe a CP asymmetry?

Decay probabilities are equal? No CP asymmetry??Make use of the fact that B mesons mix.. Decay amplitudes: particles:

antiparticles:In terms of complex amplitudes we expect for Bs->D K ., while for the anti-particle decay:.. But, the question is: how can we observe a difference between these processes, since the decay probability is given by the absolute square of the amplitudes, which is the same. The B-mesons provide an interesting feature: the mixing.12

The CP violating decay: BsDs K31-3-200813

Due to mixing possibility the decay BsDsK+ can occur in two quantum amplitudes:A2. Directly:A1. Via mixing:Coupling constant with CP odd phase gIt is straighforward to show that the interference term of the two amplitudes have an opposite sign for the particle and antiparticle cases. The observable CP violation effect.A B-meson can oscillate into an anti-B:sbbsWttWBsBsLet us go back to CP violation in the decay of the Bs->Ds K. Using the mixing diagram this can now occur in two ways: directly (amplitude a1) or via mixing and a different diagram (amplitude a2). To the occurrance of Vub in one of the cases their is a CP-odd complex phase difference between the two decay modes. In addition, the mixing itself and the presence of gluons (not shown) in these diagrams provide also a CP event phase delta. How can we get a CP violating effect from this?13Double slit experiment with quantum waves31-3-200814

BsDs-K+LHCb is a completely analogous interference experiment using B-mesonsConsider the analogy of the classical Young experiment in which waves travels through two slits in a screen to make an interference pattern on a screen which depends on the phase difference along the paths. In Feynman example he demonstrates that the same is through for quantum waves of individual electrons. In B decays we have a similar situation where two amplitudes with a different phase contribute to a decay.146-sept-2007Nikhef-evaluation15

slit A: A Quantum Interference B-experimentpp at LHCb:100 kHz bbDecay timeBsDs-K+slit B:

Measure decay time

This is the experiment: We produce Bs mesons in the LHC collider. The mesons decay via two quantum aplitudes to the final state of a Ds meson and a Kaon, with a phase difference between the two decays. We now measure the decay intensity as a function of the lifetime spectrum of the Bs mesons with the LHCB detector.156-sept-2007Nikhef-evaluation16

CP Violation: matter antimatter asymmetry

BsDs-K+

An interference pattern:Decay time Decay time

What we obtain is the following decay time spectrum which shows an interference pattern as a function of the lifetime. 166-sept-2007Nikhef-evaluation17

BsDs+K-

BsDs-K+MatterAntimatterCP-mirror:Difference between curves is proportional to the CKM phase gDecay timeDecay time

Decay timeAn interference pattern:CP Violation: matter antimatter asymmetryCP Violation: matter antimatter asymmetry

Observation of CP Violation is a consequence of quantum interference!!If we repeat the same for the anti-particle decay we get a similar spectrum, but it is out of phase from the first one. The difference between the curves is proportional to the CP violating phase gamma. Note that the observation of CP Violation always requires quantum interference of two amplitudes.

176-sept-2007Nikhef-evaluation18Searching for new virtual particlesStandard Model

BsJ/yfStandard Model Decay time

Let us now select a different final state: Bs->J/psi particle (c-cbar) and phi particle (s-sbar). For this case there is only a very small CP violating phase predicted in the Standard Model. 186-sept-2007Nikhef-evaluation19

Searching for new virtual particlesStandard ModelNew Physics

BsJ/yf Decay time

Tiny CP-odd phase in couplings!Possible CP-odd phase in couplings!?However, if an alternative decay mode, outside the SM exists, which does have CP odd phases, it can interfere with the SM diagram and result in an oscillation pattern. 196-sept-2007Nikhef-evaluation20

Searching for new virtual particlesStandard ModelNew PhysicsMission:To search for new particles and interactions that affect theobserved matter-antimatter asymmetry in Nature, by makingprecision measurements of B-meson decays.B->J/yfB->J/yf

BsJ/yf

Search for a CP asymmetry: Decay time

?Again for the anti-B, it would be a different decay rate. This brings us to a mission statement for LHCb:20 LHCb @ LHC

A Large Hadron Collider Beauty Experiment for Precision Measurements of CP-Violation and Rare DecaysCMSALICEATLASLHCb

CERNs = 14 TeVLHCb: L=2-5 x 1032 cm-2 s-1sbb = 500 mbinel / s bb = 160=> 1 year = 2 fb-1bbbbLumi is a factor 50 to 20 below peak design lumi of General Purpose Detectors (GPD) defocussing beams21b-b detection in LHCb31-3-200822

LHCb event rate: 40 MHz1 in 160 is a b-bbar event 1012 b-bbar events per yearBackground SupressionFlavour taggingDecay time measurement vertices and momenta reconstruction effective particle identification (, , , , ) triggersbtagBsKKKDsPrimary vertex~1 cm

Schematic of b-bbar production where one Bs decays in Ds K. In order to collect such events the experimental requirements are: bg suppression, decay time measurement by reconstructing decay distance of the B and its momentum. As well as to determine whether a b quark decayed or a b-bar quark. For this we can use the other B: flavour tagging. Event rate of 40 Mhz. 1 in 160 = 10^12 year. The experiment has good vertex as well as momentum reconstruction, pid and a good trigger to reduce the background online.2223GEANT MC simulation

Used to optimise the experiment and to test measurement sensitivitiesWe have made full MC simulation studies to optimise the experiment and to test the reconstruction quality. More later.2324A walk through the LHCb detector

pp~ 200 mrad~ 300 mrad (horizontal)10 mradIndicate collission point. Acceptance between 15 mrad and 200 mrad. First half serves roughly to reconstruct the trajectories of charged particles in a big dipole magnetic field. The second half are detectors to recognize the particle identity: photon, electron, muon, pion, kaon.24B-Vertex Measurement31-3-200825

Vertex Locator (Velo)Silicon strip detector with 5 mm hit resolution

Vertexing: Impact parameter trigger Decay distance (time) measurement DsBsKKKd47 mm144 mm440 mm

Primary vertexDecay time resolution = 40 fss(t) ~40 fsExample: Bs Ds KThe detector built around the interaction point is the Verex locator. It is an array of silicon detetectors that can be moved in to a distance of 8 mm of the beam line.2526Momentum and Mass measurement

Momentum meas.: Mass resolution for background suppression

Next there is the magnetic field region. A large dipole magnet is surrounded by tracking stations in fron and behind. The Bfield integral is 4 Tm, which allows for precise momentum measurements up to high momenta.2627Momentum and Mass measurement

Momentum meas.: Mass resolution for background suppression

btBsKKp+, KDsPrimary vertex

Bs Ds KBs Ds pMass resolutions ~14 MeVNext there is the magnetic field region. A large dipole magnet is surrounded by tracking stations in fron and behind. The Bfield integral is 4 Tm, which allows for precise momentum measurements up to high momenta.27

28

Particle IdentificationRICH2: 100 m3 CF4 n=1.0005RICH: K/p identification using Cherenkov light emission angleRICH1: 5 cm aerogel n=1.03 4 m3 C4F10 n=1.0014

The RICH detectors serve mainly to identify pions and kaons. They are not present in Atlas or CMS. The detection mechanism is based on the fact that particles traverse the detectors with velocities higher that the velocity in the detector medium (gas). RICH 1 optimized for low momentum tracks, RICH 2 for high momentum tracks. As charged particle tracks traverse the medium they radiate photons in a cone around their track direction. These photons make ring images around the track as measured in the tracking detectors. The emission angle of the cone depends on the velocity of the particle. If we know the velocity from the RICH and the momentum from the trackers, the particle mass and therefore the identity is known. Again a number of postdocs and grad students is required to make the pattern recognition work. Image of RICH2.28

29

Particle IdentificationRICH2: 100 m3 CF4 n=1.0005RICH: K/p identification; eg. distinguish Dsp and DsK events.RICH1: 5 cm aerogel n=1.03 4 m3 C4F10 n=1.0014Cerenkov light emission angle

btBsKK,KDsPrimary vertex

KK : 97.29 0.06%pK : 5.15 0.02%Bs Ds KThe RICH detectors serve mainly to identify pions and kaons. They are not present in Atlas or CMS. The detection mechanism is based on the fact that particles traverse the detectors with velocities higher that the velocity in the detector medium (gas). RICH 1 optimized for low momentum tracks, RICH 2 for high momentum tracks. As charged particle tracks traverse the medium they radiate photons in a cone around their track direction. These photons make ring images around the track as measured in the tracking detectors. The emission angle of the cone depends on the velocity of the particle. If we know the velocity from the RICH and the momentum from the trackers, the particle mass and therefore the identity is known. Again a number of postdocs and grad students is required to make the pattern recognition work. Image of RICH2.2930LHCb calorimeters

ehCalorimeter system : Identify electrons, hadrons, neutrals Level 0 trigger: high ET electron and hadron

btBsKKKDsPrimary vertexSubsequently the calorimeters identify photons, elctrons, hadrons by stopping the showers. They supply the Et trigger.3031LHCb muon detection

mMuon system: Level 0 trigger: High Pt muons Flavour tagging: eD2 = e (1-2w)2 6%btagBsKKKDsPrimary vertex

And finally the muon system identifies muons. Anything else is stopped.31The LHCb Detector31-3-200832VELOMuon detCalosRICH-2MagnetOTRICH-1

VELOMuon detCalosRICH-2MagnetOT+ITRICH-1Installation of detector is completed

We have seen the first events from the LHC31-3-200833First LHC Tracks in the Velo15-12-200834

linked hitsnot linked hits

Talk of Ann Van LysebettenCosmic tracks in LHCb15-12-200835

Detector alignment T0 calibration RT-relation Events from the LHC beam injection15-12-200836

In SummaryDsBsKK,Kdp47 mm144 mm440 mm

BsDs-K+MC 5 years data:Reconstruct and select B-events:Decay time (ps)Extract CP-Violation parameters:Detect produced particles:Decay time spectra:Conclusion and Outlook31-3-200838Complementary research approach: Atlas and CMS look for new physics via direct production of particles LHCb studies new physics via the couplings in B-decay loop effectsIn LHCb many different B-decay studies are preparedto examine CP violation and rare decays.The experiment is ready for data in 2009!Analisis topics 3815-12-200839

39Backup Slides

Summary of Signal Efficiencies31-3-200841ConclusionsLHCb is a heavy flavour precision experiment searching for New Physics in CP Violation and Rare Decays A program to do this has been developed and the methods, including calibrations and systematic studies, are being worked out..CP Violation: 2 fb-1 (1 year)*g from trees: 5o - 10og from penguins: 10oBs mixing phase: 0.023bseff from penguins: 0.11Rare Decays: 2 fb-1 (1 year)* BsK*mm s0 : 0.5 GeV2Bs g Adir , Amix : 0.11 AD : 0.22Bsmm BR.: 6 x 10-9 at 5sWe appreciate the collaboration with the theory community to continue developing new strategies.

We are excitingly looking forward to the data from the LHC.* Expect uncertainty to scale statistically to 10 fb-1. Beyond: see Jim Libbys talk on Upgrade42

LHCb DetectorMUONRICH-2 PIDRICH-1 PIDTracking (momentum)vertexingHCALECAL31-3-200844

Display of LHCb simulated event Hope to see reconstructed events like this soon. 4431-3-200845

+First sign of New Physics in Bs mixing?

SM box has (to a good approx.) no weak phase: fSM = 0S.M. N.P. ?Experiments at the Tevatron CDF and D0) have already been looking for this: the decay rate as a sum of the SM and possible new physics, where it is clear that if the total amplitude has a CP odd phase (here labelled phi_s) it must originate from physics outside the SM, since the SM box diagram predics only a tiny phase.4531-3-200846

+First sign of New Physics in Bs mixing?

SM box has (to a good approx.) no weak phase: fSM = 0If fS 0 then new physics outside the CKM is presentS.M. N.P. UTfit collab.; March 5, 2008Combining recent results of

CDF, D0 on

with Babar, Belle results:March 5,2008

?3.7 s deviationFrom 0CDF and D0 have observed deviations on the order of two sigma, however, recently the Utfit collaboration, who make combined fits to all unitary triangle data (including Babar end Belle), has published a first evidence of 3.7 deviation from the SM. 46Quark flavour interactions31-3-200847 Charged current interaction with quarks:

Quark mass eigenstates are not identical to interaction eigenstates:

In terms of the mass eigenstates the weak interaction changes from:

u, c, td, s, bWgweakJThe basic diagram of the weak interaction couples the W meson to an up-type quarks and a down-type quark with a weak coupling constant. The coupling is represented by a current J of the famous V-A type. In the models the quark interaction eigenstates are not the same as the physical mass eigenstates. Up type mass eigenstates are a rotation of the interaction eigenstates. Down type mass eigenstates are a different rotation of the interaction eigenstates. In terms of the mass eigenstates the interaction becomes . And we have introduced the CKM matrix: a 3x3 unitary rotation matrix in flavour (or generation) space. Note that similar physics occurs in the lepton sector if neutrinos are not massless: VPMNS

47Quark flavour interactions31-3-200848 Charged current interaction with quarks:

Quark mass eigenstates are not identical to interaction eigenstates:

In terms of the mass eigenstates the weak interaction changes to:

Cabibbo Kobayashi Maskawa quark mixing matrix

u, c, td, s, bWgweakJThe basic diagram of the weak interaction couples the W meson to an up-type quarks and a down-type quark with a weak coupling constant. The coupling is represented by a current J of the famous V-A type. In the models the quark interaction eigenstates are not the same as the physical mass eigenstates. Up type mass eigenstates are a rotation of the interaction eigenstates. Down type mass eigenstates are a different rotation of the interaction eigenstates. In terms of the mass eigenstates the interaction becomes . And we have introduced the CKM matrix: a 3x3 unitary rotation matrix in flavour (or generation) space. Note that similar physics occurs in the lepton sector if neutrinos are not massless: VPMNS

48Sept 28-29, 200549B meson Mixing Diagrams

Dominated by top quark mass:

dbbdWu,c,tu,c,tWBdBdA neutral B-meson can oscillate into an anti B-meson before decaying:49There is a diagram in the SM that allows a transition of a B particle to an anti-B particle; the so-called box diagram. The calculation of this transition probability is highly non-trivial and expressed by the parameter Delta m. Here is an expression, which contains decay constant, bag factors, QCD factors and functions S. However the dependence of the the quark flavours can be seen: the t-quark dominates.GIM: Due to triangle relation: VubVud* + VcdVcb* + VtdVtb*=0. Highly non-trivial calculation of Delta M. Eta_B is a QCD factor~0.55. The decay constant f_B ~ 175 MeV , the bag factor B_B~1.3Sept 28-29, 200550

B0B0 Mixing: ARGUS, 1987

First sign of a really large mtop!Produce a bb bound state, (4S),in e+e- collisions:

e+e- (4S) B0B0

and then observe:

~17% of B0 and B0 mesons oscillate before they decay Dm ~ 0.5/ps, tB ~ 1.5 psIntegrated luminosity 1983-87: 103 pb-150The mixing is first obsurved by the Argus experiment; several years before the top quarks was actually seen in Tevatron. We see here that both the B-mesons decay into a positively charged lepton: both are B-particles; not anti-B. One of the has mixed since they are produced as a B-anti-B pair. This happened in 17% of the cases, from which a top quark mass of about ~160 GeV was predicted. Bd vs Bs mixing31-3-200851dbbdWttWBdBdDue to the different values of CKM couplings the Bs mixes faster then the Bd

sbbsWttWBsBsBd BdBd BdBd mixingBs mixing

Bs BsBs BsBs mixingBoth the Bd and Bs mixing have been precisely measured in experiments5.1 x 1011 Hz1.8 x 1013 HzIndeed, the top, and its interactions, can be studied without producing it directly. The mixing probabilities of the Bd and the Bs meson involveDifferent couplings (replace a d-quark by an s-quark), such that the oscillation of Bs mesons is predicted to be very fast in comparison to their decay.51Sept 28-29, 200552Observing CP violation|A||A| Only if both g and d are not 0

BDs+ KBDs K+A=a1+a2A=a1+a2dd+g-ga1a1a2a2AACompare the |amplitude| of the B decay versus that of anti-B decay;g is the CP odd phase , d is a CP even phaseNote for completeness: since the CP even phase depends on the mixingthe CP violation effect becomes decay time dependentWe plot the complex decay amplitude of the B-> Ds-K+ and compare it to the anti-B->Ds+K-52

53

~1.41.2 m2

Red = Measurements (hits)Blue = Reconstructed tracksEff = 94% (p > 10 GeV) Typical Momentum resolution dp/p ~ 0.4% Typical Impact Parameter resolution sIP ~ 40 mmLHCb tracking: momentum measurement These tracking detectors register the hits of the traversing particels in each interaction. Using these hits patter recognition algorithms, developed by grad students and postdocs reconstruct the trajectories across the B-field and the particle momenta. Reconstruction efficiency is typically 95%.The mom resolution is , the IP resolution, i.e. the position close to the production vertex is .53

54LHCb triggerHLT rateEvent typePhysics200 HzExclusive B candidatesB (core program)600 HzHigh mass di-muonsJ/, bJ/X (unbiased)300 HzD* candidatesCharm (mixing & CPV)900 HzInclusive b (e.g. bm)B (data mining)HLT: high IP, high pT tracks [software] then full reconstruction of event40 MHz 1 MHz 2 kHz L0: high pT (m, e, g, h) [hardware, 4 ms] Storage (event size ~ 50 kB)Detector

L0, HLT and L0HLT efficiencyNote: decay time dependent efficiency: eg. Bs Ds K Proper time [ps] Efficiency btBsKKKDsPrimary vertex54L0 confirmation: HLT associate L0 objects with large impactr parameter tracks 2) inclusive and exclusive selctionsEfficiency in many decay modes will depend on decay time control channels

54Flavour Tagging

Performance of flavour tagging: Efficiency eWrong tag wTagging power Bd~50%Bs~50%33%~6%Tagging power:

56Measuring time dependent decays

btBsKKDsPrimary vertexMeasurement of Bs oscillations:Bs->Ds p+ (2 fb-1)Experimental Situation: Ideal measurement (no dilutions)57Measuring time dependent decays

btBsKKDsPrimary vertexBs->Ds p+ (2 fb-1)Measurement of Bs oscillations:Experimental Situation:Ideal measurement (no dilutions)+ Realistic flavour tagging dilution58

Measuring time dependent decaysbtBsKKDsPrimary vertexBs->Ds p+ (2 fb-1)Measurement of Bs oscillations:Experimental Situation:Ideal measurement (no dilutions)+ Realistic flavour tagging dilution+ Realistic decay time resolution59

Measuring time dependent decaysbtBsKKDsPrimary vertexBs->Ds p+ (2 fb-1)Measurement of Bs oscillations:Experimental Situation:Ideal measurement (no dilutions)+ Realistic flavour tagging+ Realistic decay time resolution+ Background events60

Measuring time dependent decaysbtBsKKDsPrimary vertexExperimental Situation:Ideal measurement (no dilutions)+ Realistic flavour tagging dilution+ Realistic decay time resolution+ Background events+ Trigger and selection acceptance Two equally important aims for the experiment: Limit the dilutions: good resolution, tagging etc. Precise knowledge of dilutionsBs->Ds p+ (2 fb-1)Measurement of Bs oscillations:BsDsK 5 years data

BsDs-K+BsDs+K-BsbDs-K+BsbDs+K-Conclusion: after 5 years of LHCb31-3-200862

To make this plot only Standard Model physics is assumed.CKM Unitarity Triangle in 2007:Expected errors after 5 years (10 fb-1) of LHCb:Finally such measurements are included in the overall CKM fitting programs, which make very colourfull plots as you see here. These plots are not easy to read as they contain information from many measurements. For example the UT triangle is here and the measurements should coincide with the apex. The errorbars of the measurements are reflected in the widths of the bands. On the right you see an impression of what LHCb could add after 5 years of running. Assuming that the measurements only include Standard Model physics for the central value.62Conclusion and Outlook LHCb31-3-200863CP ViolationMeasure the Bs mixing phase (BsJ/y f )Measure the CKM angle gamma via tree method (Bs DsK)Measure the CKM angle gamma via penguin loops (B(s) h+h - )

Rare DecaysMeasure Branching Ratio Bs m+ m -Measure angular distribution B0 K* m+ m - Measure radiative penguins decays: b s g (B Xs g )

Other Flavour PhysicsAngle beta, B-oscillations, lifetimes, D-physics, Higgs,?The collaboration has organised analysis groups and identified hot topics: Atlas and CMS look for new physics via direct production of particles LHCb tries to study it via the (possibly complex) couplings in B decay loop diagramsAnalisis topics 63In the mean time: Detector Commissioning and Analysis PreparationDsBsKK,Kdp47 mm144 mm440 mm

BsDs-K+Monte Carlo study for 5 years data: