EW Penguin & Leptonic B decays

Slides:

Advertisements

Similar presentations

Electroweak Penguin B Decays: b→s,d  and b→s,d ll Jeffrey Berryhill University of California, Santa Barbara For the BaBar Collaboration LNS Journal Club.

Advertisements

23, June, 2005Beauty2005, Assisi, Italy Electroweak Penguin decays at Belle Akimasa Ishikawa KEK.

Electroweak and Radiative Penguin Transitions from B Factories Paoti Chang National Taiwan University 2 nd KIAS-NCTS Joint Workshop on Particle Physics,

August 12, 2000DPF Search for B +  K + l + l - and B 0  K* 0 l + l - Theoretical predictions and experimental status Analysis methods Signal.

Title Gabriella Sciolla Massachusetts Institute of Technology Representing the BaBar Collaboration Beauty Assisi, June 20-24, 2005 Searching for.

Radiative B Decays (an Experimental Overview) E.H. Thorndike University of Rochester CLEO Collaboration FPCP May 18, 2002.

Recent Electroweak Results from the Tevatron Weak Interactions and Neutrinos Workshop Delphi, Greece, 6-11 June, 2005 Dhiman Chakraborty Northern Illinois.

The physics of b s l + l - : 2004 and beyond Jeffrey Berryhill University of California, Santa Barbara January 19, 2004 Super B Factory Workshop University.

DPF Victor Pavlunin on behalf of the CLEO Collaboration DPF-2006 Results from four CLEO Y (5S) analyses:  Exclusive B s and B Reconstruction at.

Measurements of Radiative Penguin B Decays at BaBar Jeffrey Berryhill University of California, Santa Barbara For the BaBar Collaboration 32 nd International.

Toru Iijima & Koji Ikado (Talk presented by T.I.) Nagoya University May 15, 2006 “Flavour in the LHC CERN The First Evidence of B   from Belle.

At Belle Katsumi Senyo Nagoya University May 16~18, 2002 Flavor Physics and CP Violation ~ Exclusive and Inclusive Analysis Results.

1 Physics in Collision, June 27-29, 2004, Youngjoon Kwon Rare B decays Introduction Hadronic two-body states - non-factorizable processes Radiative & EW.

Rare and Radiative B Decays M.-Z. Wang ( 王名儒 ) on behalf of the Belle Collaboration ICFP2005Outline IntroductionIntroduction B → XB → X s γ moments B →B.

Koji Ikado Beauty 2006 Rare B Decays : B  l, ll, ll  Nagoya University Koji Ikado The 11 th International Conference on B-Physics at Hadron Machines.

Sin2  1 /sin2  via penguin processes Beauty 2006 Sep.25-29, Univ. of Oxford Yutaka Ushiroda (KEK)

B Decays to Open Charm (an experimental overview) Yury Kolomensky LBNL/UC Berkeley Flavor Physics and CP Violation Philadelphia, May 18, 2002.

1. 2 July 2004 Liliana Teodorescu 2 Introduction  Introduction  Analysis method  B u and B d decays to mesonic final states (results and discussions)

XLIst Rencontres de Moriond: Electroweak Interactions and Unified Theories New results from BaBar: Rare Meson Decays and the Search for New Phenomena Jeffrey.

Exclusive Semileptonic b  u Decays at CLEO Sheldon Stone Syracuse University.

Radiative Leptonic B Decays Edward Chen, Gregory Dubois-Felsmann, David Hitlin Caltech BaBar DOE Presentation Aug 10, 2005.

Moriond EW March 5-12, 2005 Antonio Limosani KEK Slide 1 Mini- Review( Belle & BaBar ) By Antonio Limosani JSPS Fellow (KEK-IPNS JAPAN) XLth Rencontres.

Rare B Decays at Belle Hsuan-Cheng Huang ( 黃宣誠 ) National Taiwan University 2 nd BCP NTU, Taipei June 7 - 9, 2002.

Rare B  baryon decays Jana Thayer University of Rochester CLEO Collaboration EPS 2003 July 19, 2003 Motivation Baryon production in B decays Semileptonic.

BaBar physics, recent highlights and future prospects Owen Long, BaBar physics analysis coordinator U. C. Riverside & SLAC December 5, 2008.

1 Multi-body B-decays studies in BaBar Ben Lau (Princeton University) On behalf of the B A B AR collaboration The XLIrst Rencontres de Moriond QCD and.

1 Highlights from Belle Jolanta Brodzicka (NO1, Department of Leptonic Interactions) SAB 2009.

1 Rare Bottom and Charm Decays at the Tevatron Dmitri Tsybychev (SUNY at Stony Brook) On behalf of CDF and D0 Collaborations Flavor Physics and CP-Violation.

Evidence for the Flavor Changing Neutral Current Decays ICHEP 2002, Amsterdam, July 27, 2002 Jeffrey D. Richman UC Santa Barbara for the B A B AR Collaboration.

Study of exclusive radiative B decays with LHCb Galina Pakhlova, (ITEP, Moscow) for LHCb collaboration Advanced Study Institute “Physics at LHC”, LHC Praha-2003,

Higgs Reach Through VBF with ATLAS Bruce Mellado University of Wisconsin-Madison Recontres de Moriond 2004 QCD and High Energy Hadronic Interactions.

B  K   p  and photon spectrum at Belle Heyoung Yang Seoul National University for Belle Collaboration ICHEP2004.

Semileptonic Decays from Belle Youngjoon Kwon Yonsei Univ. / Belle.

A. Drutskoy, University of Cincinnati B physics at  (5S) July 24 – 26, 2006, Moscow, Russia. on the Future of Heavy Flavor Physics ITEP Meeting B physics.

Inclusive semileptonic B decays: experimental Elisabetta Barberio University of Melbourne FPCP: Vancouver April 2006.

B   and B  D ( * )   decays at BaBar Guglielmo De Nardo University of Napoli “Federico II” and INFN Representing the BaBar collaboration 36 th International.

Near-term Prospect of B physics Y. Kwon (Yonsei Univ.)

Update on Measurement of the angles and sides of the Unitarity Triangle at BaBar Martin Simard Université de Montréal For the B A B AR Collaboration 12/20/2008.

15/12/2008from LHC to the UniverseP. Chang 1 CP Violation and Rare R Decays CP Violation and Rare R Decays Paoti Chang Paoti Chang National Taiwan University.

Guglielmo De Nardo for the BABAR collaboration Napoli University and INFN ICHEP 2010, Paris, 23 July 2010.

1 Inclusive B → X c l Decays Moments of hadronic mass and lepton energy PR D69,111103, PR D69, Fits to energy dependence of moments based on HQE.

Belle and Belle II Akimasa Ishikawa (Tohoku University)

Measurements of  1 /  Flavor Physics and CP Violation 2010, May 25, 2010, Torino, Italy, K. Sumisawa (KEK)

1 outline ● Part I: some issues in experimental b physics ● why study b quarks? ● what does it take? ● Part II: LHCb experiment ● Part III: LHCb first.

Improved measurements of B → hh decays at Belle

Present status of Charm Measurements

Review of b  s l+ l- and B0  l+ l- Decays

Hadronic B Decays at BELLE and BABAR

David B. MacFarlane SLAC EPAC Meeting January 25, 2006

fully reconstructed B’s in B-factory experiments

Theoretical Motivation Analysis Procedure Systematics Results

Recent B physics results from BABAR and BELLE

Status of mixing and CP-violation measurements at LHCb

Semileptonic B-decays (b to u transition)

Heavy Flavor Results from CMS

Radiative and electroweak penguin processes in exclusive B decays

CKM Status In this lecture, we study the results summarized in this plot. November 17, 2018 Sridhara Dasu, CKM Status.

Search for CP Violating Decays of theU(4S)

Measurements of Radiative Penguin B Decays at BaBar

Recent Results on Radiative and Electroweak Penguin B Decays at Belle

Searching for SUSY in B Decays

B  at B-factories Guglielmo De Nardo Universita’ and INFN Napoli

Decadimenti rari radiativi e leptonici del mesone B

Charmless Quasi-two-Body Modes at BaBar

D0 Mixing and CP Violation from Belle

Gabriella Sciolla (MIT)

Exclusive Semileptonic B Decays and |Vub|: Experimental

B Physics at the LHC Neville Harnew University of Oxford.

Constraints on α from B Decays at BaBar

Observation of non-BBar decays of (4S)p+p- (1S, 2S)

Presentation transcript:

EW Penguin & Leptonic B decays Youngjoon Kwon Overview Prologue: Introduction & History Modes w/ 0 n’s Modes w/ 1 n’s Modes w/ ≥2 n’s Summary & Prospects

Physics Goals of B-factories Establish CP violation in B decays and over-constrain the SM picture of CP violation any inconsistency? Measure fundamental parameters of SM 10 (out of 18, not counting neutrino masses, yet) parameters are related with quark flavors CKM triangle parameters; angles & sides Search for rare / forbidden decays and explore new physics effects FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

Motivation for Rare B decays SM is a very good approximation to reality. i.e., for most processes Need to consider processes where is small in order to be sensitive to new physics. (Ex.) processes dominated by penguin loops Compare Nature (exp.) with SM prediction for those sensitive processes Find New Physics or learn new lessons FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

First penguin observation History 1 EM Penguins First penguin observation CLEO, PRL 1993

First EW Penguin observation History 2 Electroweak Penguins First EW Penguin observation by Belle, PRL 2002

Contents 0n final states Full recon. of signals B  l+l- B  Xs l+l- 1n final states n-recon. using (E,p)miss B  l n B  l n g Final states w/ ≥2n Full recon. of “other B” B  tn B  K(*) nn, “nothing”

Similar penguins, rotated by 90o zero-n modes – straightforward by full-recon. of signal B – hermeticity is still used to suppress Xln backgr. EW penguin, mostly Similar penguins, rotated by 90o

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Overview penguins (g, Z) and W-box contribute sensitive to C9, C10 & sgn(C7) ( |C7| from bsg) rich structure q2 distribution Forward-Backward asymmetry FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Overview AFB K* l+ l- Ali et al. PRD (2000) SM q2 B : measured in the l+l- frame FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Inclusive First measured by Belle: PRL (2003) w/ 60fb-1 pseudo-reconstruction of the Xs system combine K  or KS with (0~4)p (n(p0)≤1) L-fit Mbc for signal yield peaking background component J/y, y(2S): vetoed by m(l+l-) B  Xs p+p- is subtracted, weighted by fake rate combinatorial backgr. comp. mostly from double-semilept. B decays + some from conti. suppressed by combining variables into a likelihood ratio Fitted (Mbc) using shapes from Xsem Beam-constrained mass: FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) NBB=89M FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) NBB=152M 3210 Xse+e- 369 Xsm+m- 6814 Xsl+l- Xse+m- control sample 5.8s significance Belle-Conf-0414  then, extrapolated FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

Differential distributions K K* K, K* states are clearly seen / consistent w/ SM FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Exclusive B  K(*) l+ l- first observed by Belle in 2001 (29/fb) first >3s evidence by BaBar (81/fb) first observed by Belle in 2003 (140/fb) Main backgrounds B  J/yK(*), etc.  veto! B  K*g (conversion), B  K*p0  m(e+e-) > 0.14 GeV combinatorial from semileptonic, continuum B  K(*) p+p- (pm fake ~2%)2 FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) B  K(*) l+ l- update NBB=273M NBB=123M FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) BF(B  K(*) l+ l-) Belle-Conf-0415 [Note] NNLO by Ali, et al. is assumed to compensate for q2=0 pole for K*e+e- factor 0.75 & SM values from Ali, et al. FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

more than just BF for B  K(*)l+l- rich structure: sensitive to C9, C10 & sgn(C7) q2 distribution Forward-Backward asymmetry Ratio of BF’s (ee vs. mm) Kl+l- : sensitive to H0 in 2HDM (=1 in SM) FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) q2 for B  K(*)l+l- dq2 /q2 ~ 0.6% Yellow bands show ranges of theoretical predictions. Both results are consistent with the SM prediction. FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle-Conf-0415 AFB (q2) for B  K(*)l+l- Raw AFB in each q2 region is extracted from Mbc fit. Dotted lines indicate charmonium veto windows. Kll has no asymmetry, hence a good control sample. Curves (not fitted lines!) show theory including exp’tal efficiency. Both are in agreement with data. FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Leptonic decays Highly suppressed in the SM by CKM & GIM SM: BF(Bs(d)m+m-)= 3.5x10-9 (1.0x10-10) New physics potential Tree: SUSY w/ RPV Loop: MSSM, mSugra, 2HDM, etc. FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle/BaBar NBB=85M NBB=123M FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) CDF/D0 These limits start to restrict SUSY SO(10) models FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

W-annihilation; crucial for fB one-n modes W-annihilation; crucial for fB Not as clean, but could be interesting/useful A missing neutrino in the final state,  full recon. of signal B is not possible Use hermeticity and neutrino mass constraint  (E,p)miss for neutrino 4-momentum

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle/BaBar BaBar, PRL (2004) Belle, prelim. Belle-Conf-0429 FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle-Conf-0429 FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

Searches for these modes use modes with ≥2 n’s Belle/BaBar BaBar Searches for these modes use full reconstruction of the other B

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) B  t n Belle (for example) FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Belle-Conf-0428 FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) B  t n BaBar Two methods for kinematic tagging a. Hadronic full-recon tag high purity NBB=89M FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) B  t n BaBar b. semileptonic partial-recon tag high stat - some ambiguity, trading purity for statistics - require in the physical region NBB=124M combining the two methods, FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) B  K n n FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

B  “invisible” (nn), nng FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)

FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.) Summary Electroweak penguin decays B  Xs l+l- Firmly established in both exclusive & inclusive measurements Measurements (BF, q2, m(Xs)) are consistent with SM First attempt to measure AFB as a function of q2 in exclusive modes, K l+l- & K* l+l-  consistent with SM Much improved limits in the leptonic B decays Approach w/in 1 order of mag. to SM for B  ln(g), tn 2 orders of mag. to SM for B  l+l- Limits for other exotic modes: B  (nothing)(X) FPCP 2004, Oct. 4 - 9, 2004, Youngjoon Kwon (Yonsei Univ.)