Pentaquarks and New Hadron Spectroscopy at BaBar

Slides:



Advertisements
Similar presentations
Phi-Psi, Feb.-Mar., 2006, S.Uehara1 Experimental studies of charmonia in two-photon collisions at Belle S.Uehara (KEK) for the Belle Collaboration e +
Advertisements

29 June 2004Steve Armstrong - Searches for Pentaquark Production at LEP1 Searches for Pentaquark Production at LEP Steve Armstrong (ALEPH Collaboration)
Measurement of non BB Decays of Y(4S) to Y(1S)     and Y(2S)     Silvano Tosi Università & INFN Genova.
Sep. 29, 2006 Henry Band - U. of Wisconsin 1 Hadronic Charm Decays From B Factories Henry Band University of Wisconsin 11th International Conference on.
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.
Heavy Flavor Production at the Tevatron Jennifer Pursley The Johns Hopkins University on behalf of the CDF and D0 Collaborations Beauty University.
Baryonic decays of B mesons. H.Kichimi, June28-July3, Baryonic decays of B mesons H. Kichimi Representing the Belle collaboration BEACH June28-July3,
CHARM 2007, Cornell University, Aug. 5-8, 20071Steven Blusk, Syracuse University D Leptonic Decays near Production Threshold Steven Blusk Syracuse University.
New Particles at BELLE Beauty 2005 Assisi Spectroscopy and new Particles F. Mandl There is an impressive list of new particles in the charm sector discovered.
Hot Topics from BaBar Fabrizio Bianchi INFN, Torino (on behalf of the BaBar Collaboration) Direct CP Violation in (hep-ex/ ) Observation of and search.
16 April 2005 APS 2005 Search for exclusive two body decays of B→D s * h at Belle Luminda Kulasiri University of Cincinnati Outline Motivation Results.
Radiative and Rare B-Decays at BaBar All results are preliminary unless journal ref. is given limit values are 90% CL unless otherwise specified Carsten.
B decays to charm hadrons at Belle M.-C. Chang Fu Jen Catholic University (On behalf of Belle Collaboration) European Physical Society HEP2007 International.
1 BaBar Collaboration Randall Sobie Institute for Particle Physics University of Victoria.
Sergio Grancagnolo Activity Summary 9 Jan work in BaBar The apparatus Physics with BaBar Data analysis.
Preliminary Measurement of the BF(   → K -  0  ) using the B A B AR Detector Fabrizio Salvatore Royal Holloway University of London for the B A B AR.
Moriond EW, 3 Mar 2008Tagir Aushev (EPFL, ITEP)1  B → K S  0  0  B → K S K S  B → K S  0  B → D *+ D *-  B → a 1 , a 1 K, b 1 , b 1 K...  
July 7, 2008SLAC Annual Program ReviewPage 1 New Charmonium-like States Arafat Gabareen Mokhtar SLAC Group-EC (B A B AR ) DOE Review Meeting July 8 th,
Measurement of B (D + →μ + ν μ ) and the Pseudoscalar Decay Constant f D at CLEO István Dankó Rensselaer Polytechnic Institute representing the CLEO Collaboration.
Low-x Wshop, , Prague Jan Hladký, Exotic Anti-Charm Baryon State 1 Evidence for a Narrow Exotic Anti-Charmed Baryon State *) Jan Hladký, Institute.
Charmonium Production at BaBar Jamie Boyd University of Bristol Photon 2003, Frascati 7 th -11 th April 2003 On behalf of the Collaboration.
Moriond QCD, Mar., 2007, S.Uehara 1 New Results on Two-Photon Physics from Belle S.Uehara (KEK) for the Belle Collaboration Rencontres de Moriond, QCD.
Contents 2 J-PARC E19 Collaboration 3 Pentaquark search 4 Genuine exotic hadron (uudds bar ) M = ~1540 MeV/c 2 (decay    KN) Situation is still controversial...
D 0 Measurement in Cu+Cu Collisions at √s=200GeV at STAR using the Silicon Inner Tracker (SVT+SSD) Sarah LaPointe Wayne State University For the STAR Collaboration.
Rare B  baryon decays Jana Thayer University of Rochester CLEO Collaboration EPS 2003 July 19, 2003 Motivation Baryon production in B decays Semileptonic.
29/03/04A. Geiser, Recent Spectroscopy Results from ZEUS 1 Recent Spectroscopy Results from the (H1 and) ZEUS Experiments nSelected main topic: evidence/search.
cc spectroscopy at elle S.L.Olsen Hawaii QWG 2004 Worksop IHEP Beijing _.
New hadrons BaBar Maurizio Lo Vetere University of Genova & INFN Representing the Collaboration Particles and Nuclei International Conference.
High Density Matter and Searches for Huan Z. Huang Department of Physics and Astronomy University of California, Los Angeles The STAR Collaboration.
Roman Mizuk (ITEP, Moscow) Search for the Θ + pentaquark using kaon secondary interactions at Belle Outline Detector, idea Search for inclusive production.
1 Hadron Spectroscopy at BABAR BY Usha Mallik (University of Iowa) Representing The BaBar Collaboration The International Light-Cone Workshop July 7, 2005.
Daniel Sherwood 03/2005 Search for Crypto-Exotic States in Babar Daniel Sherwood Dr. Liliana Teodorescu.
1 Recent Results on J/  Decays Shuangshi FANG Representing BES Collaboration Institute of High Energy Physics, CAS International Conference on QCD and.
Results from BaBar on the Decays B  Kl + l - and B  K*l + l - FPCP-2002, U.Pennsylvania John J. Walsh INFN-Pisa.
Krešo Kadija Ruđer Bošković Institute, Zagreb,Croatia
On behalf of the BABAR Collaboration
Charmless Hadronic B Decays at BaBar
Hadron Physics at Belle
Tagir Aushev For the Belle Collaboration (EPFL, Lausanne ITEP, Moscow)
Pentaquarks: Challenges and Pitfalls
Baryon Production and Pentaquark Searches at B Factories
Observation of a “cusp” in the decay K±  p±pp
Maurizio Lo Vetere University of Genova & INFN
Maurizio Lo Vetere University of Genova & INFN
Spectroscopy Today BaBar’s Contributions
Search for exotic baryon resonances in pp collisions at the CERN SPS
Radiative Penguin B Decays at BABAR
Charm spectroscopy 1 A. Drutskoy University of Cincinnati
J. Schümann National Taiwan University (Belle Collaboration)
Search For Pentaquark Q+ At HERMES
CHARMONIUM AND CHarMonium-like states at BaBar
B decays to open charm and charmonium from BaBar
new measurements of sin(2β) & cos(2β) at BaBar
Direct CP Violation in Observation of and search for
B  at B-factories Guglielmo De Nardo Universita’ and INFN Napoli
University of Minnesota on behalf of the CLEO Collaboration
Hidden charm spectroscopy from B-factories
Pentaquark Searches and DsJ Studies in BaBar
Study of e+e- pp process using initial state radiation with BaBar
An Experimental Overview
Searches and Results in BaBar
Recent Results on Charmonium from BaBar
E19 result Ryuta Kiuchi (SNU)
New States Containing Charm at BABAR
Charmed Baryon Spectroscopy at BABAR
Search for a low-mass Higgs boson (A0) at BABAR
The Q+ Pentaquark Search at HERMES Wolfgang Lorenzon Collaboration
Heavy Hadron Studies at the Tevatron
New Spectroscopy with Charm quarks at B factories.
Search for X - - Pentaquark in COMPASS
Presentation transcript:

Pentaquarks and New Hadron Spectroscopy at BaBar XIth International Conference on Elastic and Diffractive Scattering: Towards High Energy Frontiers Pentaquarks and New Hadron Spectroscopy at BaBar Stefania Ricciardi on behalf of the BaBar Collaboration May 15-20, 2005 – XVIIth Rencontres de Blois, Chateau de Blois, France

BaBar Data Set BaBar: e+e- experiment running at s=10.58 GeV [Y(4S)] General purpose detector with excellent tracking and PID capabilities 2005 Run restarted 250 fb-1 recorded at Y(4S) Large data set: 250 fb-1 so far 500 million B mesons from Y(4S) decay 850 million e+e-qq, q=u,d,s,c (plenty of light mesons and baryons!) In this talk, recent results on possible new states of matter: 1. pentaquarks 2. X(3872) Blois, May 16th, 2005 Stefania Ricciardi

The Pentaquark Controversy Observations of narrow states with exotic quantum numbers Experiment State Production Decay Significance LEPS gC12 K+n 4.6 s CLAS gd 5.2s gp 7.8s SAPHIR 4.8s COSY pp K0sp 3.7s JINR Q5+ p(C3H8) 5.5s SVD pA 5.6s DIANA K+Xe 4.4s nBC nA 6.7s NOMAD 4.3s HERMES ed 5.8s ZEUS ep 4.6s NA49 Z5-- Xp H1 Q5c D*p 5.4s Also ~20 recent negative searches including a new high-statistics CLAS result (presented at APS and DIS05) Q5(1540)+ [uudds] X5(1860)- - [ddssu] Q5c(3100)0 [uuddc] Blois, May 16th, 2005 Stefania Ricciardi

Pentaquark Searches at BaBar 1. Inclusive search in e+e- interaction e+e- PX Q5(1540)+  p K0s X5(1860) - -  X- p- X5(1860) 0  X- p+ Other possible new states decaying in LK,SK,pKs 2. Inclusive search in electro- and hadro-production (inner detector used as target) Q5(1540)+  p K0s 10 S I3 High statistics and high resolution searches! Blois, May 16th, 2005 Stefania Ricciardi

e+e-  Q5+ X Search for Q5(1540)+  p K0s 123 fb-1 BaBar Q5(1540)+ preliminary Q5(1540)+ mass resolution ~2MeV (MC HWHM) No evidence near 1540 MeV 98,000 Lc+ used to check MC mass resolution and efficiency Blois, May 16th, 2005 Stefania Ricciardi

Q5+ Yield in p* bins Look for a signal in 500 MeV p* bins p* = momentum of Q5+ candidate in Y(4S) rest frame Fit signal in each bin with 2 fixed values of Q5+ width Yields consistent with 0 BaBar preliminary Blois, May 16th, 2005 Stefania Ricciardi

e+e- X5- -X and e+e- X50X 2 displaced vertices: X-,L X50 X- p+ No evidence at 1860 MeV 2 displaced vertices: X-,L X50 X- p+ X- L p- L pp- X5- - X- p- X- p+ X- p- BaBar preliminary preliminary Clear signal for known particles: 24,000 X(1530)0  X- p+ 8,000 Xc(2470)0  X- p+ Blois, May 16th, 2005 Stefania Ricciardi

Other inclusive pentaquark searches Inclusive search in LK, S0K, pKS LK, S0K from X5-, X50, N5+, N50 pKS from S5+ No pentaquark signal observed BaBar preliminary mass(LK-) GeV/c2 Blois, May 16th, 2005 Stefania Ricciardi mass(LK+) GeV/c2 mass(LKS) GeV/c2

Pentaquark and baryon production rates Branching fraction assumptions BF(Q5+  pKS)~25% BF(X 5- -  X- p-)~50% Blue and red lines to guide the eye only Total x-section UL @ 95%CL G=1 MeV G at UL on width Q5+ + Q5- <171 fb <363 fb X 5- - + X 5++ <25 fb <36 fb BaBar preliminary BaBar preliminary upper limits (95%CL): Q5+ <1/8 baryon rate X5-- <1/4 baryon rate Q5+ X5- - Blois, May 16th, 2005 Stefania Ricciardi

Hadro-production and electro-production Hadro-production: interactions of hadrons produced in e+e- annihilation with detector material Schematic plan view of interaction region 3GeV e+ electro-production: off-beam e- and e+ with Be beam-pipe 9 GeV e- off beam off beam Results can be compared to fixed target experiments x z different x and z scales Blois, May 16th, 2005 Stefania Ricciardi

Inner detector tomography with pKs vertices Dch wall Support tube Silicon Vertex Tracker SVT Be beam pipe Spatial distribution of pKs vertices reproduces inner detector features  Interactions of primary e or secondary particles with material Blois, May 16th, 2005 Stefania Ricciardi

Q5(1540)+ results in electro- and hadro- production Well defined Ks peak All vertices electro-+hadro- production Ks signal region 1540 MeV 230 fb-1 BaBar preliminary Ks sideband regions No evidence p Ks sideband K p M(Ksp) Blois, May 16th, 2005 Stefania Ricciardi

Q5(1540)+ results in electro-production High intensity region at Y=0 due mainly to e+ and e- off-beam collisions with Be beam-pipe 1540 MeV BaBar preliminary Ks signal No evidence Separate analysis for events selected in the Be regions at Y=0 Ks sideband Blois, May 16th, 2005 Stefania Ricciardi

X(3872) X(3872) J/yp+p-, solid evidence: observed by Belle, CDF, D0 and BaBar Hard to interpret as missing cc state  new state of matter? DD* molecule? suppressed production in B0 decays 4-quark state? 2 mass eigenstates for X(3872) with |Dm|>5 MeV Recent results by BaBar: An update of the exclusive search in B decays B-  K- J/y p+p- to suppress background X(3872) reconstructed in J/yp+p- Measures product of BF: BF(BX(3872)K) x BF(X(3872)  J/y p+p-) Inclusive search on the recoil of a kaon and reconstructed B Measures absolute BF: BF(BXK) Search in ISR Search also for a charged partner X(3872) Dzierba et al. hep-ph/0412268 Maiani et al. PRD71:014028,2005 Blois, May 16th, 2005 Stefania Ricciardi

Exclusive reconstruction: BX(3872)K, X(3872) J/y p+ p- 244 fb-1 B+ B0 BaBar preliminary BaBar preliminary N=51±14 Significance = 6.9s mX=(3871.3±0.6)MeV/c2 BF(B+XK+,X  J/y p+ p-)= (8.5 2.3  0.8) x 10-6 N=8.4±4.5 Significance = 2.7s mX=(3868.6±1.2)MeV/c2 BF(B0XK0,X  J/y p+ p-)= (5.1  2.7  0.7) x 10-6 BaBar preliminary DM= mX(B+)-mX(B0) = (2.7±1.3) MeV/c2 0.15 < BF(B0XKs)/BF(B- XK-) <1.34 @ 90%CL Not at the stage yet to discriminate among models, but method promising.. Blois, May 16th, 2005 Stefania Ricciardi

Inclusive Search for BXK X = hc, J/y, cc0,cc1,hc(2S), y(2S),y(3770),X(3872),.. K- ? 4S Fully reconstruct one B Look for a charged K in the rest of event Plot and fit p*(K), p* = momentum in B rest frame Measure the absolute BF(BXK) of any state in the recoil system Blois, May 16th, 2005 Stefania Ricciardi

Kaon momentum spectrum 244 fb-1 BaBar preliminary p* X(3872) production smaller than other charmonium states  in conjunction with the measurement of the BF product sets a PRELIMINARY lower limit BF(X(3872) J/y pp) >4.3% @ 90%CL Very clear J/y and hc N (J/y) = 258+- 42 N (hc) = 266 +-42 p* Blois, May 16th, 2005 Stefania Ricciardi

Branching Fractions of BXK Recoil X y(2S) y(3770) All U.L. at 90%CL BaBar preliminary inclusive measurements BaBar exclusive measurements Blois, May 16th, 2005 Stefania Ricciardi

Search for X (3872)± in B decays Is X(3872)J/yr0  J/y (p+p-)? If so IX(3872)= 1  Expect X(3872)-  J/yr- If X(3872) belongs to I triplet and I is conserved in the decay  BF(B X-K) ~ 2 BF(B  X0K) Searched for B0 X-K+ and B- X-KS with X-  J/yr- 212 fb-1 B- B0 No evidence Isovector hypothesis excluded [PRD RC 71,031501 (2005)] X(3872)-? X(3872)-? m(J/yp-p0) m(J/yp-p0) Blois, May 16th, 2005 Stefania Ricciardi

Search for X(3872) in ISR events e+e- X(3872)g, X(3872)J/y p+p- J/y mm 89fb-1 y(2S) X(3872) region X(3872) could be seen if JPC=1— Mass difference m(2m2p)-m(2m) for events near the J/y mass 3.05<m(2m)<3.15 GeV No signal Set an UL @ 90% CL: B(X(3872) J/y p+p-)  GX ee <6.2 eV PRD71,052001(2005) Blois, May 16th, 2005 Stefania Ricciardi

Summary Pentaquarks X(3872) No evidence from high statistics inclusive searches in e+e- . Limits below expectations for baryons No evidence of Q5+ from hadro- and electro-production. X(3872) Signal firmly established in exclusive B+ J/yppK+ Gaining statistical significance in B0 decays inclusive search of cc states sets UL on absolute B+X(3872)K+ branching fraction No evidence of a charged partner X(3872)± No evidence of X(3872) in ISR production Blois, May 16th, 2005 Stefania Ricciardi

Any question? Blois, May 16th, 2005 Stefania Ricciardi

The BABAR Experiment at PEP-II Electromagnetic Calorimeter 6580 CsI crystals e+ ID, p0 and g reco Instrumented Flux Return 19 layers of RPCs m+ and KL ID e+ [3.1 GeV] Cherenkov Detector (DIRC) 144 quartz bars K,p separation Drift Chamber 40 layers Tracking + dE/dx Silicon Vertex Tracker 5 layers of double sided silicon strips e- [9 GeV] Blois, May 16th, 2005 Stefania Ricciardi

Comparison of BaBar e-Be with Q5+ electro-production Zeus: ep epKsX Hermes: e+d  KspX S*(1480)? Excesses over our mass distribution would have lower significance M=1528 3 MeV 5.8 s M=1522 3 MeV 4.6 s Possible acceptance loss at low mass (PID requires proton |p|> 4.1 GeV/c) Blois, May 16th, 2005 Stefania Ricciardi

Search for Q*++ in B decays Predicted uuuds state m=1.43-1.70 GeV G=37-80 MeV 81 fb-1 Ref.: Ellis et al. JHEP0405:002,2004 Wu and Ma, PRD69,077501,2004 Walliser et al.,J.Exp.Theor.Phys. 97 433(2003) D.Borisyuk et al. hep-ph/0307370 Not seen in pK+ scattering  G <15 MeV This is first search in B decays (89M B mesons) B+ Q5*++p , Q5*++  pK+ Main backgrounds: baryons from the continuum B decays to charmonium B+ X K+, X( pp) X=hc,J/y,cc,y(2S) Binning dependent on resolution 4*sigma where sigma 2->10 MeV as invariant mass increases Average efficiency 17% NO Signal observed, set branching fraction upper limits vs m(kp) (width independent) Blois, May 16th, 2005 Stefania Ricciardi

Charmed pentaquark Blois, May 16th, 2005 Stefania Ricciardi