Exotic meson spectroscopy at LHCb M. Kreps Physics Department - PowerPoint PPT Presentation

Exotic meson spectroscopy at LHCb M. Kreps Physics Department www2.warwick.ac.uk

Introduction �� In the quark model we think of hadrons as qq or qqq �� But there is nothing preventing other combinations �� → Where are all those combinations with more than 3 quarks or anti-quarks? Michal Kreps – Exotic meson spectroscopy at LHCb 2 28 October 2014

Introduction - molecules �� There are lot of objects composed of baryons �� Michal Kreps – Exotic meson spectroscopy at LHCb 3 28 October 2014

Introduction - molecules �� There are lot of objects composed of baryons �� Where are similar objects from mesons? �� Michal Kreps – Exotic meson spectroscopy at LHCb 3 28 October 2014

Scalar mesons NOTE ON SCALAR MESONS BELOW 2 GEV Revised September 2013 by C. Amsler (Univ of Bern), S. Ei- delman (Budker Institute of Nuclear Physics, Novosibirsk), T. Gutsche (University of T¨ ubingen), C. Hanhart (Forschungszen- trum J¨ ulich), S. Spanier (University of Tennessee), and N.A. T¨ ornqvist (University of Helsinki). From RPP by PDG V. Interpretation of the scalars below 1 GeV: In the literature, many suggestions are discussed, such as conventional q ¯ q mesons, q ¯ qq ¯ q or meson-meson bound states. In addition one expects a scalar glueball in this mass range. In reality, there can be superpositions of these components, and one often depends on models to determine the dominant one. Although we have seen progress in recent years, this question remains open. Here, we mention some of the present conclusions. The f 0 (980) and a 0 (980) are often interpreted as multiquark states [140–144] or K ¯ K bound states [145]. The insight into �� Candidates beyond qq mesons exist, but real trouble is how to �� decide whether they are qq or something else Michal Kreps – Exotic meson spectroscopy at LHCb 4 28 October 2014

Charmonium �� Back in 2003, many expected �� arXiv:1403.1254 �� states still missing �� Belle started to search for them �� and quickly found one �� Did not fit into expected spectra �� Mass close to m ( D 0 ) + m ( D ∗ 0 ) �� 300 PRL 91, 262001 Events/0.010 GeV 200 100 0 0.40 0.80 1.20 M( π + π - l + l - ) - M(l + l - ) (GeV) Michal Kreps – Exotic meson spectroscopy at LHCb 5 28 October 2014

X ( 3872 ) properties Number of candidates / (2.5 MeV) CDF Run II ψ (2S) X(3872) 6000 70 1200 1200 ± ψ 20285 228 (2S) 2 -1 ≈ entries / 2.5 MeV/c 60 L 780pb 1000 5000 1000 50 800 40 4000 800 600 30 400 3000 600 20 200 ± 10 2292 113 X(3872) 2000 400 0 0 550 600 750 800 LHCb 1000 200 0 0 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4 600 800 1000 1200 1400 π π ψ ψ 2 ψ π π + - M( J/ ) - M(J/ ) [MeV] + - m(J/ ) [ GeV/c ] PRL 110, 222001 7 ≈ -1 10 CDF Run II Preliminary L 780pb Number of experiments / bin LHCb X(3872) yield / unit volume 500 θ θ |cos( )| < 0.6 |cos( )| > 0.6 ψ ψ X(3872) 6 J/ J/ 10 PRL 98, 132002 data points PC -+ PC ++ Simulated J =1 Simulated J =2 θ θ θ θ |cos( )| < 0.5 |cos( )| > 0.5 |cos( )| < 0.5 |cos( )| > 0.5 π π π π π π π π 400 5 10 acc. corrected prediction for 300 ++ 0 4 10 p t -- 1 s data ++ 1 200 3 p 10 2 -+ p 100 2 10 0 π π 0 0.63 1.15 /2 0 0.63 1.15 /2 -200 -100 0 100 200 π π 0 0.63 1.15 /2 0 0.63 1.15 /2 t L L -+ ++ = -2 ln[ (2 )/ (1 ) ] ∆ Φ π π || - | - /2| �� Quantum numbers J PC = 1 ++ �� Michal Kreps – Exotic meson spectroscopy at LHCb 6 28 October 2014

What is X ( 3872 ) ? �� Lot has been done for X (3872) �� Despite all effort during 10 years, our understanding of what �� X (3872) is still about same �� To find convincing case of non-conventional meson is hard �� Michal Kreps – Exotic meson spectroscopy at LHCb 7 28 October 2014

Z ( 4430 ) + history Belle PRL 100, 142001 30 θ Flat cos (b) Candidates K ψ π - (2S) K moments 400 ψ π - J/ K moments Events/0.01 GeV PRD 79, 112001 20 200 10 0 0 3.8 4.05 4.3 4.55 4.8 M( π + ψ ι ) (GeV) (d) -,0 → ψ π - 0,+ B (2S) K 200 �� Seen by Belle, but not �� Residuals Babar 0 �� Data consistent �� Charged state �� -200 �� → Cannot be cc 3.8 4 4.2 4.4 4.6 4.8 2 m (GeV/c ) �� Latest Belle result uses 4D ψ π - (2S) �� analysis �� Is it real and if yes, is it resonance? �� Michal Kreps – Exotic meson spectroscopy at LHCb 8 28 October 2014

Z ( 4430 ) + history Belle (a) 30 Belle PRL 100, 142001 30 20 2 Events/10 MeV/c Events/0.01 GeV 10 PRD 79, 112001 20 0 10 B A B AR (*1.18) (b) 30 20 0 3.8 4.05 4.3 4.55 4.8 M( π + ψ ι ) (GeV) 10 �� Seen by Belle, but not �� 0 �� Babar 2 Diff./10 MeV/c (c) 10 �� Data consistent �� 0 �� Charged state -10 �� χ �� 2 /NDF = 54.7/58 -20 → Cannot be cc 3.8 4 4.2 4.4 4.6 4.8 �� Latest Belle result uses 4D 2 m (GeV/c ) - ψ π �� (2S) �� analysis �� Is it real and if yes, is it resonance? �� Michal Kreps – Exotic meson spectroscopy at LHCb 8 28 October 2014

Exotic meson spectroscopy at LHCb M. Kreps Physics Department - PowerPoint PPT Presentation

Exotic meson spectroscopy at LHCb M. Kreps Physics Department www2.warwick.ac.uk Introduction In the quark model we think of hadrons as qq or qqq

Measurement of exotic hadrons at LHCb Pavel Krokovny on behalf of the LHCb Collaboration Budker

The Meson Spectroscopy Program at Jefferson Laboratory Alessandra Filippi INFN Torino, Italy 1

Experiments on heavy flavour spectroscopy and exotic states Liming Zhang (Tsinghua University)

Light Meson Spectroscopy News and Recent Developments Sebastian Neubert Technische Universit

Measuring B meson production at LHCb Matthew Bradley Introduction Contents of talk today:

XYZ states at LHCb Marcin Kucharczyk on behalf of LHCb Collaboration IFJ PAN Krakow MESON 2018,

Outline Spectroscopy of exotic nuclei The MINOS device Physics program at RIBF

Meson spectroscopy at VES and COMPASS D. Ryabchikov Institute for High Energy Physics, Protvino;

Hadron spectroscopy in LHCb Antimo Palano INFN and University of Bari, Italy On behalf

The LHCb Upgrade and prospects on spectroscopy studies Yiming Li Institute of High

Central Exclusive Production (CEP) at LHCb Ronan McNulty (UCD Dublin) on behalf of the LHCb

B meson key measurements at the LHC 85 LHCb Key Measurements B s mixing phase s b s

Status of Charmed Meson Spectroscopy Feng-Kun Guo Institute of Theoretical Physics, Chinese

Baryon Spectroscopy in Exclusive Meson Photoproduction Experiments Volker Cred Florida State

Light Meson Spectroscopy at BESIII Tianjue Min Institute of High Energy Physics, Chinese Academy

The Meson Spectroscopy Program Using the Forward Tagger with CLAS12 at Jefferson Lab Stuart

Computer Graphics - Light Transport - Philipp Slusallek & Arsne Prard-Gayot Overview

X-ray Diffraction Callister Chapter 3 p. 66-71 Maxwells Equations

The Barnes-Hut N-Body Approximation Ben Prather UIUC Algorithms Interest Group, Aug 3, 2016

Boulder ozone sonde data analyses for multiple tropopause origin. Irina Petropavlovskikh 1,2 ,

The dressing method and solutions to integrable systems S. Dyachenko, D. Zakharov, V. Zakharov

CS 6958 LECTURE 16 PATHTRACING REVIEW, MATERIALS March 3, 2014 Recall 2 can split

Dynamical Variability of Ozone near the Tropopause from AIRS Data Laura Pan and Bill Randel

The Model-based Approach to Medical Decision Support Why and How ... Peter Lucas

Exotic meson spectroscopy at LHCb M. Kreps Physics Department - PowerPoint PPT Presentation

Exotic meson spectroscopy at LHCb M. Kreps Physics Department www2.warwick.ac.uk Introduction In the quark model we think of hadrons as qq or qqq

Measurement of exotic hadrons at LHCb Pavel Krokovny on behalf of the LHCb Collaboration Budker

The Meson Spectroscopy Program at Jefferson Laboratory Alessandra Filippi INFN Torino, Italy 1

Experiments on heavy flavour spectroscopy and exotic states Liming Zhang (Tsinghua University)

Light Meson Spectroscopy News and Recent Developments Sebastian Neubert Technische Universit

Measuring B meson production at LHCb Matthew Bradley Introduction Contents of talk today:

XYZ states at LHCb Marcin Kucharczyk on behalf of LHCb Collaboration IFJ PAN Krakow MESON 2018,

Outline Spectroscopy of exotic nuclei The MINOS device Physics program at RIBF

Meson spectroscopy at VES and COMPASS D. Ryabchikov Institute for High Energy Physics, Protvino;

Hadron spectroscopy in LHCb Antimo Palano INFN and University of Bari, Italy On behalf

The LHCb Upgrade and prospects on spectroscopy studies Yiming Li Institute of High

Central Exclusive Production (CEP) at LHCb Ronan McNulty (UCD Dublin) on behalf of the LHCb

B meson key measurements at the LHC 85 LHCb Key Measurements B s mixing phase s b s

Status of Charmed Meson Spectroscopy Feng-Kun Guo Institute of Theoretical Physics, Chinese

Baryon Spectroscopy in Exclusive Meson Photoproduction Experiments Volker Cred Florida State

Light Meson Spectroscopy at BESIII Tianjue Min Institute of High Energy Physics, Chinese Academy

The Meson Spectroscopy Program Using the Forward Tagger with CLAS12 at Jefferson Lab Stuart

Computer Graphics - Light Transport - Philipp Slusallek &amp; Arsne Prard-Gayot Overview

X-ray Diffraction Callister Chapter 3 p. 66-71 Maxwells Equations

The Barnes-Hut N-Body Approximation Ben Prather UIUC Algorithms Interest Group, Aug 3, 2016

Boulder ozone sonde data analyses for multiple tropopause origin. Irina Petropavlovskikh 1,2 ,

The dressing method and solutions to integrable systems S. Dyachenko, D. Zakharov, V. Zakharov

CS 6958 LECTURE 16 PATHTRACING REVIEW, MATERIALS March 3, 2014 Recall 2 can split

Dynamical Variability of Ozone near the Tropopause from AIRS Data Laura Pan and Bill Randel

The Model-based Approach to Medical Decision Support Why and How ... Peter Lucas

Computer Graphics - Light Transport - Philipp Slusallek & Arsne Prard-Gayot Overview