A search for strange tribaryonic states in the reaction Heejoong Yim Seoul National University For KEK-PS E549 collaboration.

Slides:



Advertisements
Similar presentations
CBM Calorimeter System CBM collaboration meeting, October 2008 I.Korolko(ITEP, Moscow)
Advertisements

1 Search for the Flavor-Changing Neutral-Current Decay,   → p     HyangKyu Park University of Michigan, Ann Arbor for the HyperCP collaboration.
Analysis report th. Friday H.Yim To apply efficiency correction on the data spectrum, DEMONS code is investigated and modified.
SKS Minus Detectors in detail Tohoku Univ. K.Shirotori.
Confirmation for a kaon-bound state K - pp observed in antiproton- 4 He annihilation at rest G. Bendiscioli 1, T. Bressani 2, A Fontana 1, L. Lavezzi 1,
Search for  + via K + p   + X reaction with high-resolution spectrometer system Kyoto University S. Dairaku for E559 collaboration.
Study of two pion channel from photoproduction on the deuteron Lewis Graham Proposal Phys 745 Class May 6, 2009.
A search for deeply-bound kaonic nuclear states by in-flight 3 He(K -,n) reaction at J-PARC Hiroaki Ohnishi RIKEN Nishina Center J-PARC E15 experiment.
Analysis report H.Yim (6/22/2006). 2 Table of contents 1. TC cut selection region 2. Spectrum comparison after bug fixing on 1/beta - At previous, was.
J-PARC: Where is it? J-PARC (Japan Proton Accelerator Research Complex) Tokai, Japan 50 GeV Synchrotron (15  A) 400 MeV Linac (350m) 3 GeV Synchrotron.
An Experimental Search for Deeply Bound Kaonic Nuclei with Stopped Kaons Takatoshi Suzuki(U-Tokyo), for KEK-E471 collaboration Outline: 1. Introduction.
T.C. Jude D.I. Glazier, D.P. Watts The University of Edinburgh Strangeness Photoproduction: Polarisation Transfer & Cross-Section Measurements.
Medium heavy Λ hyper nuclear spectroscopic experiment by the (e,e’K + ) reaction Graduate school of science, Tohoku University Toshiyuki Gogami for HES-HKS.
ハイパー核ガンマ線分光用 磁気スペクトロメータ -SksMinus- 東北大学 大学院理学研究科 白鳥昂太郎 ATAMI.
K 中間子原子核探索実験 ( J-PARC E15 実験) の解析状況 佐田優太 ( 京都大学、理研 ) Y.SADA for the E15 collaboration RCNP 研究会「核子・ハイペロン多体系における クラスター現象」 1.
GlueX Particle Identification Ryan Mitchell Indiana University Detector Review, October 2004.
Lambda hypernuclear spectroscopy at JLab Hall-C Graduate School of Science, Tohoku University Toshiyuki Gogami for the HES-HKS collaboration 1.Introduction.
Possibility for hypernuclei including pentaquark,   Kiyoshi Tanida (Seoul National Univ.) 19 Sep 2009 High resolution search for   &
The search for deeply bound kaonic nuclear states at J-PARC Toshihiko Hiraiwa Kyoto University On behalf of the J-PARC E15 collaboration.
P10-2: Exclusive Study on the  N Weak Interaction in A=4  -Hypernuclei (update from P10) S. Ajimura (Osaka Univ.) Osaka-U, KEK, OsakaEC-U, RIKEN, Seoul-U,
25/07/2002G.Unal, ICHEP02 Amsterdam1 Final measurement of  ’/  by NA48 Direct CP violation in neutral kaon decays History of the  ’/  measurement by.
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.
SQM2004, Cape Town, Sept. 16, 2004 STAR 1 Cronin Effect for the identified particles from 200 GeV d+Au collisions Xiangzhou Cai Shanghai INstitute of Applied.
BNL/ Tatsuya CHUJO CNS workshop, Tokyo Univ. Identified Charged Single Particle Spectra at RHIC-PHENIX Tatsuya Chujo (BNL) for the PHENIX.
1 Hypernuclear spectroscopy up to medium mass region through the (e,e’K + ) reaction in JLab Mizuki Sumihama For HKS collaboration Department of Physics.
EPECUR – Investigation of narrow baryon resonances Konovalova Elena St. Petersburg Nuclear Physics Institute (PNPI) with collaboration Institute of Theoretical.
Setup for hypernuclear gamma-ray spectroscopy at J-PARC K.Shirotori Tohoku Univ. Japan for the Hyperball-J collaboration J-PARC E13 hypernuclear  -ray.
Omega meson in nucleus, experimental study K. Ozawa (Univ. of Tokyo)
Calibration of the new Particle Identification Detector (PID) Tom Jude, Derek Glazier, Dan Watts.
Kinematics of  + n   p   0  p reaction Susumu Oda 2007/04/10-19.
V.L. Kashevarov. Crystal Collaboration Meeting, Mainz, September 2008 Photoproduction of    on protons ► Introduction ► Data analysis.
Production of Double Strangeness Hypernuclei in 12 C(K -,K + ) Reaction at 1.67 GeV/c Choi Bong Hyuk Pusan National University For the E522 collaboration.
Background from pion beam interactions with LH2 & solid state targets J.Biernat/I.Koenig/J. Markert/W.Przygoda/P.Salabura.
Дмитрий ВавиловИФВЭ 2005, 19 Декабря1 New results on rare kaon and pion decays from BNL E949 Dmitry Vavilov E949 is an high rate K + decay at rest experiment.
Recent Studies of Hypernuclei Formation with Electron Beams at MAMI Patrick Achenbach U Mainz Sept. 2o13.
Status of GlueX Particle Identification Ryan Mitchell September 10, 2004.
1 Tomoaki Hotta (RCNP, Osaka Univ.) for The LEPS Collaboration Cracow Epiphany Conference, Jan 6, 2005 Introduction LEPS experiment Results from new LD.
A search for deeply-bound kaonic nuclear states in (in-flight K -, N) reaction Hiroaki Ohnishi RIKEN.
Study of Neutron-Rich  Hypernuclei Tomokazu FUKUDA Osaka Electro-Communication University 2013/09/091EFB 22.
Experimental Search for the Decay K. Mizouchi (Kyoto University) (1) Physics Motivation (2) Detector (3) Selection Criteria (4) Branching Ratio (5) Background.
Beijing, Sept 2nd 2004 Rachele Di Salvo Beam asymmetry in meson photoproduction on deuteron targets at GRAAL MENU2004 Meson-Nucleon Physics and the Structure.
Study of hadron interactions in OPERA-like bricks Aim: background study of   h, hhh decays 4 th September 2012 H. Shibuya, H. Ishida, T. Matsuo, T. Fukuda,
Yudai Ichikawa (Kyoto University/JAEA) 2013/07/26 RCNP 研究究会「核子・ハイペロン多体系におけるクラスター現 象」 1 J-PARC における d(π +, K + ) 反応を 用いた K 中間子原子核の探索.
Barbara Sciascia July,29 th - LNF 1 Barbara Sciascia K  semileptonic decays Charged Kaon Meeting July, 29 th - LNF Single photon efficiency in KPM events.
Status of the hadronic cross section (small angle) Federico Nguyen February 22 nd 2005  the 2002 data sample and available MC sets  trigger efficiency.
00 Cooler CSB Direct or Extra Photons in d+d  0 Andrew Bacher for the CSB Cooler Collaboration ECT Trento, June 2005.
J-PARC でのハイパー核ガンマ線分光実験用 散乱粒子磁気スペクトロメータ検出器の準備 状況 東北大理, 岐阜大教 A, KEK B 白鳥昂太郎, 田村裕和, 鵜養美冬 A, 石元茂 B, 大谷友和, 小池武志, 佐藤美沙子, 千賀信幸, 細見健二, 馬越, 三輪浩司, 山本剛史, 他 Hyperball-J.
Master thesis 2006 Shirotori1 Hypernuclear gamma-ray spectroscopy at J-PARC K1.8 beam line 東北大学大学院理学研究科 原子核物理 白鳥昂太郎.
A search for strange tribaryonic states in the reaction H. Yim for KEK-E549 collaboration H. Bhang, J. Chiba, S. Choi, Y. Fukuda, T. Hanaki, R. S. Hayano,
A High Statistics Study of the Decay M. Fujikawa for the Belle Collaboration Outline 1.Introduction 2.Experiment Belle detector 3.Analysis Event selection.
Georgie Mbianda 1 for the Baryon (E01-002) Collaboration 1 University of the Witwatersrand, Johannesburg Exclusive Electroproduction of π + and η mesons.
Highest Q 2 Polarized Measurement of the Electric Form Factor of the Neutron – E Presented by Jonathan Miller For the Hall A E Collaboration.
J-PARC における 4  He の生成と構造の研究 東北大学 大学院理学研究科 白鳥昂太郎 for the Hyperball-J Collaboration.
15 cm Plots of missing mass spectrum and 90% interval for width of 0.5 and 10 MeV. Color lines show upper limit, lower limit and sensitivity. Search for.
Search for neutron-rich hypernuclei in FINUDA: preliminary results presented by M. Palomba 1 for the FINUDA Collaboration 1 INFN and Dipartimento di Fisica,
1 Recent Results on J/  Decays Shuangshi FANG Representing BES Collaboration Institute of High Energy Physics, CAS International Conference on QCD and.
Strange tribaryon: Experiments H. Outa (RIKEN) for KEK-PS E471/E549/E Summary of 4 He(stopped K -,p) / 4 He(stopped K -,n) experiment (E471) 2.
Paolo Massarotti Kaon meeting March 2007  ±  X    X  Time measurement use neutral vertex only in order to obtain a completely independent.
M. Martemianov, ITEP, October 2003 Analysis of ratio BR(K     0 )/BR(K    ) M. Martemianov V. Kulikov Motivation Selection and cuts Trigger efficiency.
QM2002 (July / / Nantes / France)Susumu SATO (JSPS) for the PHENIX collaboration page 1 Susumu SATO Japan Society for the Promotion of Science,
Search for a nuclear kaon bound state K - pp at the J-PARC K1.8 beam line. Dep. of physics, Kyoto University / JAEA Y. Ichikawa for E27 Collaboration Korea-Japan.
First ExclusiveMeasurement of the Non-Mesonic Weak Deacay of 12  C First Exclusive Measurement of the Non-Mesonic Weak Deacay of 12  C Seoul national.
Seoul National University On behalf of J-PARC E18 Collaboration
Precision spectroscopy of Kaonic Helium 3d2p X-rays
The First
平岩聡彦 京都大学 On behalf of the J-PARC E15 collaboration
Study of e+e- pp process using initial state radiation with BaBar
High-pT Identified Charged Hadrons in √sNN = 200 GeV Au+Au Collisions
E19 result Ryuta Kiuchi (SNU)
N* Production from J/ decays at BES
Presentation transcript:

A search for strange tribaryonic states in the reaction Heejoong Yim Seoul National University For KEK-PS E549 collaboration

KEK-PS E549 Collaboration H. Bhang, J. Chiba, S. Choi, Y. Fukuda, T. Hanaki, R. S. Hayano, M. Iio, T. Ishikawa, M. Iwai, S. Ishimoto, T. Ishiwatari, K. Itahashi, M. Iwasaki, P. Kienle, J. Kim, Y. Matsuda, H. Ohnishi, S. Okada, H. Outa, M. Sato, S. Suzuki, T. Suzuki, D. Tomono, E. Widmann, T. Yamazaki, H. Yim

・ Deep! ・ Narrow! ~ 100 MeV ~ 20 MeV = meta-stable ・ Shrink! cf: B N ~ 10 MeV = high density? Embedding K in nucleus ?

4 He p p n K-p p n K- n Z : +1 T : 0 or 1 p p n n K-p n n K- Z : 0 T : 1 predicted unpredicted Missing mass measurement 3 How to produce ?

Possible states of the reaction Neutron spectrum Hard to confirm the structure due to low statistics Search for state (T=0) with 8 times better statistics than E471 Aim of ReactionZTTZTZ +11,00 Predicted by Akaishi spectroscopy E471 nucl-ex/ Motivation of E549 Neutron Measurement

Stopped K - method. ① Incident K - and its track by beamline detectors (K - /π - ratio ~ 1/200, K - ~ 5000/spill) ② Nucleon and its stop timing(TOF) by NC ③ Secondary charged particle and its track by TC-Tracking Chamber Same condition with previous experiment (Semi-Inclusive condition) ① ② ③ TC NC Overview of Experiment Setup T0 & BDC

TOF Analysis for Neutral Events Beam 1.T T0 : Measured time by T0 2.T kaon_flight : Beam (K - ) flight time from T0 to it’s stop 3.T NC : Measured time by NC Track viewed by VDC&BDC Liq. He veto TOF target→NC : Flight time from target vertex to NC TOF target  NC T NC T T0 T kaon_flight

1.5 times Improved Missing Mass Resolution 1/β ADC (MeVee) E471 Time Calibration and Resolution for Neutron Counter (NC) E threshold =7 MeVee 1/β σ=0.030 E549 E471 Missing Mass [MeV/c 2 ] Missing Mass resolution in σ [MeV/c 2 ] Black – previous (E471) Red – Present (E549) Resolution variation on a Missing Mass

Momentum scale and slewing correction are well tuned Σ+Σ+ n π+ π+ cos θ < (~185 MeV/c) (~0 MeV/c) K-K- N Σ QF π QF Check of TOF Analysis Threshold=2MeVee ADC (MeVee) MeV/c Σ decay P n ~ 185MeV/c Threshold=2MeVee Σ decay 1/β ~ /β Counts / (5 MeV/c) Neutron momentum

E471 E549 Much improved S/N ratio Threshold E471 = 10 MeVee Threshold E549 = 7 MeVee 10 MeVee 1/β Counts/0.025 Background Level Check 5 MeVee Counts/ /β

Semi-Inclusive Neutron Spectrum E471 (nucl-ex/ ) About 8 times higher statistics Neutron momentum (MeV/c) Counts / (10 MeV/c) E549 Neutron momentum (MeV/c) Semi-inclusive

Missing Mass Spectrum Counts / (5 MeV/c 2 ) Black – Data Red – Estimated background Missing Mass [MeV/c 2 ] Semi-inclusive neutron Background subtracted Pion coincidence is required to estimate upper limit of kaonic state

Counts/(5MeV/c 2 ) Missing Mass [1] R. C. Byrd et al. Nucl. Inst. Meth. A313 (1992) 437. Missing mass spectrum with pion coincidence Missing Mass [MeV/c 2 ] Black – 7 MeVee threshold Red – 10 MeVee threshold Blue – 13 MeVee threshold Missing Mass [MeV/c 2 ] Efficiency [ratio] Neutron detection efficiency estimation by DEMON code [1] Arbitrary Unit Efficiency corrected Missing Mass Missing Mass [MeV/c 2 ] Missing Mass resolution in σ [MeV/c 2 ] Black – previous (E471) Red – Present (E549) Resolution variation on a Missing Mass ΛπNN Λnp ΣNN

Develop a simulation for the semi-inclusive measurement with pion coincidence. Estimate number of stopped kaon in the target. Obtain upper limit of the kaonic tribaryon state. The further analysis is in progress ! Further analysis procedure Goal

IF exist, → YNN or πΛNN Y → π ± N Study spectrum using decay particle - Σ ± production by fast π (>~125 MeV/c) - Λ production by slow π (<~125 MeV/c) Event tagging can improve S/N ratio, selectively. Event tagging by TC

neutron momentum [MeV/c] Counts / (10 MeV/c) Neutron momentum spectra E471 (nucl-ex/ ) Counts / (10MeV/c 2 ) Neutron momentum [MeV/c] Fast π tagged E549 Counts / (10MeV/c 2 ) Neutron momentum [MeV/c] Fast π tagged At the present moment, the narrow (Γ~20 MeV/c 2 ) structure wasn’t observed.

Summary Neutron spectra was measured for the reaction with upgraded setup. At this stage, Narrow ( Γ ~20 MeV/c 2 ) peak structure of kaonic state did not appear on present result. Now, in progress status, analysis for upper limit estimation of kaonic tribaryon state.

Spare OHPs

Missing mass spectrum MeV/c 2 Pion triggered Semi-inclusive MeV/c 2

Neutron spectra (5MeV/c binning) Semi-inclusive Pion triggered MeV/c

Stopping kaon selection z K - T0 (light output ) Stop kaon selection region Target cell region BLC VDC Target cell Beam direction Stop kaon selection makes the acceptance to be correct Sine distribution for scattered particle by VDC tracking. T0 Kaon at rest In flight z

Semi-inclusive neutron momentum distribution Previous result (E471) 7 MeVee threshold 10 MeVee threshold Present result (E549) At 7 MeVee threshold, total statistics is about 8 times higher than E471 statistics.

IF exist, → YNN or πΛNN Y → π ± N Study spectrum using decay particle - Σ ± production by fast π (>~125 MeV/c) - Λ or Σ 0 production by slow π (<~125 MeV/c) π selection by using TC Event Selection using TC (I)

E549 TC setup TC_D layer TC_A layer TC_C layer TC_B layer Event Selection using TC (II) Pion E471 TC setup TC_A layer TC_B layer Upgrade Pion Proton

Cut for Pi/P separation(1) E b +E c (MeVee) Direction normalized E A (MeVee) Direction normalized E A (MeVee) Red - fast pion Green - fast proton Red - slow pion Green - slow proton E b +E c (MeVee) Direction normalized E A (MeVee) w/ D layer hit w/o D layer hit w/ no cut

Pi/P separation for A-layer vs (B-layer + C-layer) E b +E c (MeVee) Direction normalized E A (MeVee) Direction normalized E A (MeVee) Direction normalized E A (MeVee) no cut fast pi or slow pi fast p or slow p

PID definition by TC Pion Proton Blue – slow pion Red – fast pion TC 2 nd layer [MeVee] TC 1 st [MeVee] TC 2 nd layer [MeVee] TC 1 st [MeVee] TC 2 nd layer [MeVee] TC 1 st [MeVee]TC 2 nd layer [MeVee] TC 1 st [MeVee]

E549 MeV/c Counts / (10 MeV/c) E471 Neutron spectrum with pion trigger MeV/c 10 MeV/c binning

Detection efficiency correction Efficiency curve by DEMONS Efficiency corrected spectra

Less than 0.05%

Resolution variation MeV/c Momentum resolution (σ) [MeV/c]

Incoming K - proton 4 He target Neutron counters Iron plate Charged particle veto counter E471 Setup Upgrade in E549 Incoming K - proton Neutron counters 4 layers→7 layers neutron Proton TOF stop (σ ~ 70ps) Veto counter for neutron detection Smaller target TOF Start counter ( σ< 70ps) Proton chamber resolution improve 150ps→50ps Both proton/neutron σ ~ 300ps proton σ=100 ~ 150ps neutron σ=200ps Upgraded feature of E549 setup

Introduction

Neutral event analysis

Results