Long Lived Particles in LHCb Upgrade II Elena DallOcco on behalf - PowerPoint PPT Presentation

Long Lived Particles in LHCb Upgrade II Elena Dall’Occo on behalf of the LHCb collaboration HL/HE LHC Meeting Fermilab 04-06/04/2018

<latexit sha1_base64="/qnqePH96WhGzAE8Z3JVLm/OwSc=">AB+3icbVBNSwMxEJ31s9avao9eQktBEOquIOpBKHrxWMHaQncp2TbhibZJckKS6l/RQ8eVLz6R7z5b0w/Dtr6YODx3gwz8KEM21c9tZWl5ZXVvPbeQ3t7Z3dgt7+/c6ThWhDRLzWLVCrClnkjYM5y2EkWxCDlthoPrsd98oEqzWN6ZLKGBwD3JIkawsVKnUPQ16wncEcCXSK3eor8SqdQdqvuBGiReDNSrpX8o2cAqHcKX343Jqmg0hCOtW57bmKCIVaGEU5HeT/VNMFkgHu0banEgupgODl+hCpW6aIoVrakQRP198QC60zEdpOgU1fz3tj8T+vnZroPBgymaSGSjJdFKUcmRiNk0BdpigxPLME8XsrYj0scLE2LzyNgRv/uVF0jipXlS9WxvGFUyRgwMowSF4cAY1uIE6NIBABk/wCm/Oo/PivDsf09YlZzZThD9wPn8AVRGUSA=</latexit> <latexit sha1_base64="9s8vpsgODPjH6KyBZEC10gJ+uQM=">AB+3icbVDLSsNAFJ3UV62vaJduhpaCIMREHUhFN24rGBsoQlhMp20Q2eSMDMRQqhf4d6NCxW3/oi7/o3Tx0JbD1w4nHMv94TpoxKZdtjo7Syura+Ud6sbG3v7O6Z+wcPMskEJi5OWCI6IZKE0Zi4ipGOqkgiIeMtMPhzcRvPxIhaRLfqzwlPkf9mEYUI6WlwKx6kvY5CvgJh1fQts6g1wjMum3ZU8Bl4sxJvVnzjp/HzbwVmN9eL8EZJ7HCDEnZdexU+QUSimJGRhUvkyRFeIj6pKtpjDiRfjE9fgQbWunBKBG6YgWn6u+JAnEpcx7qTo7UQC56E/E/r5up6MIvaJxmisR4tijKGFQJnCQBe1QrFiuCcKC6lshHiCBsNJ5VXQIzuLy8Q9tS4t506HcQ1mKINDUANHwAHnoAluQu4AIMcvIA38G48Ga/Gh/E5ay0Z85kq+APj6wdc9ZXO</latexit> <latexit sha1_base64="9s8vpsgODPjH6KyBZEC10gJ+uQM=">AB+3icbVDLSsNAFJ3UV62vaJduhpaCIMREHUhFN24rGBsoQlhMp20Q2eSMDMRQqhf4d6NCxW3/oi7/o3Tx0JbD1w4nHMv94TpoxKZdtjo7Syura+Ud6sbG3v7O6Z+wcPMskEJi5OWCI6IZKE0Zi4ipGOqkgiIeMtMPhzcRvPxIhaRLfqzwlPkf9mEYUI6WlwKx6kvY5CvgJh1fQts6g1wjMum3ZU8Bl4sxJvVnzjp/HzbwVmN9eL8EZJ7HCDEnZdexU+QUSimJGRhUvkyRFeIj6pKtpjDiRfjE9fgQbWunBKBG6YgWn6u+JAnEpcx7qTo7UQC56E/E/r5up6MIvaJxmisR4tijKGFQJnCQBe1QrFiuCcKC6lshHiCBsNJ5VXQIzuLy8Q9tS4t506HcQ1mKINDUANHwAHnoAluQu4AIMcvIA38G48Ga/Gh/E5ay0Z85kq+APj6wdc9ZXO</latexit> <latexit sha1_base64="XOLSF1NK8QXEQ+y+MJ+wE4fsoDU=">AB+3icbVBNS8NAEN3Ur1q/qj16WSwFTzERD0IRS8eKxhbaELYbDft0t1N2N0IdS/4sWDilf/iDf/jds2B219MPB4b4aZeVHKqNKO821VlbX1jeqm7Wt7Z3dvfr+wYNKMomJhxOWyF6EFGFUE9TzUgvlQTxiJFuNL6Z+t1HIhVNxL3OUxJwNBQ0phpI4X1hq/okKOQn3B4BR37DPqtsN50bGcGuEzckjRBiU5Y/IHCc4ERozpFTfdVIdFEhqihmZ1PxMkRThMRqSvqECcaKCYnb8BLaMoBxIk0JDWfq74kCcaVyHplOjvRILXpT8T+vn+n4IioSDNBJ4vijMGdQKnScABlQRrlhuCsKTmVohHSCKsTV41E4K7+PIy8U7tS9u9c5rt6zKNKjgER+AYuOActMEt6APYJCDZ/AK3qwn68V6tz7mrRWrnGmAP7A+fwBEG5K/</latexit> <latexit sha1_base64="Vo3mpBtWeRIcrqoQfThuRVFr7tw=">AB/HicbVDLSgNBEOyNrxhf8XHTw2AQPIVdUdSDEPTiMQHXBJKwzE5mkyEzs8vMrBD8Fe8eFDxKn6HN29+ipPHQRMLGoqbrq7woQzbVz3y8nMzS8sLmWXcyura+sb+c2tWx2nilCfxDxWtRBrypmkvmG01qiKBYhp9WwezX0q3dUaRbLG9NLaFPgtmQRI9hYKcjvNDRrCxwYdIGOT1BDCZToIF9wi+4IaJZ4E1Io7X1UvgGgHOQ/G62YpIJKQzjWu65iWn2sTKMcDrINVJNE0y6uE3rlkosqG72R9cP0IFVWiKlS1p0Ej9PdHQueCG2nwKajp72h+J9XT0101uwzmaSGSjJeFKUcmRgNo0AtpigxvGcJorZWxHpYIWJsYHlbAje9MuzxD8qnhe9ig3jEsbIwi7swyF4cAoluIYy+EDgHh7hGV6cB+fJeXexq0ZzKzDX/gvP8A/NOWDA=</latexit> <latexit sha1_base64="t+NoqN5q2F05YupKi0Qig+ofUN8=">AB/HicbVDLSgMxFM3UV62v8bFTJFgEV2VGFHUhFN24bMGxhc4wZNJMG5pkhiQj1FJc+R9uXKi4lX6HO7/BnzB9LR64MLhnHu5954oZVRpx/m0cjOzc/ML+cXC0vLK6pq9vnGjkxi4uGEJbIeIUYFcTVDNSTyVBPGKkFnUuh37tlkhFE3GtuykJOGoJGlOMtJFCe8tXtMVRqOE5PDqGvuQwVaFdErOCPAvcSekWN4ZVL8edgeV0P7wmwnOBEaM6RUw3VSHfSQ1BQz0i/4mSIpwh3UIg1DBeJEBb3R9X24b5QmjBNpSmg4Un9O9BXqsj08mRbqtpbyj+5zUyHZ8GPSrSTBOBx4vijEGdwGEUsEklwZp1DUFYUnMrxG0kEdYmsIJwZ1+S/xDktnJbdqwrgAY+TBNtgDB8AFJ6AMrkAFeACDO/AInsGLdW89Wa/W27g1Z01mNsEvWO/f2bKXcg=</latexit> <latexit sha1_base64="t+NoqN5q2F05YupKi0Qig+ofUN8=">AB/HicbVDLSgMxFM3UV62v8bFTJFgEV2VGFHUhFN24bMGxhc4wZNJMG5pkhiQj1FJc+R9uXKi4lX6HO7/BnzB9LR64MLhnHu5954oZVRpx/m0cjOzc/ML+cXC0vLK6pq9vnGjkxi4uGEJbIeIUYFcTVDNSTyVBPGKkFnUuh37tlkhFE3GtuykJOGoJGlOMtJFCe8tXtMVRqOE5PDqGvuQwVaFdErOCPAvcSekWN4ZVL8edgeV0P7wmwnOBEaM6RUw3VSHfSQ1BQz0i/4mSIpwh3UIg1DBeJEBb3R9X24b5QmjBNpSmg4Un9O9BXqsj08mRbqtpbyj+5zUyHZ8GPSrSTBOBx4vijEGdwGEUsEklwZp1DUFYUnMrxG0kEdYmsIJwZ1+S/xDktnJbdqwrgAY+TBNtgDB8AFJ6AMrkAFeACDO/AInsGLdW89Wa/W27g1Z01mNsEvWO/f2bKXcg=</latexit> <latexit sha1_base64="KO6mHdpVv2ZRs8Tjq8FnmfCblUA=">AB/HicbVBNS8NAEJ3Ur1q/4sfNy2IRPJVEFPUgFL14rGBsoQlhs92S3eTsLsRaij+FS8eVLz6Q7z5b9y2OWjrg4HezPMzItSzpR2nG+rtLC4tLxSXq2srW9sbtnbO/cqyShHkl4IlsRVpSzmHqaU5bqaRYRJw2o8H12G8+UKlYEt/pYUoDgXsx6zKCtZFCe89XrCdwqNElOjlFvhQoVaFdWrOBGieuAWpQoFGaH/5nYRkgsacKxU23VSHeRYakY4HVX8TNEUkwHu0bahMRZUBfnk+hE6NEoHdRNpKtZov6eyLFQaigi0ymw7qtZbyz+57Uz3T0PchanmaYxmS7qZhzpBI2jQB0mKdF8aAgmkplbEeljiYk2gVMCO7sy/PEO65d1Nxbp1q/KtIowz4cwBG4cAZ1uIEGeEDgEZ7hFd6sJ+vFerc+pq0lq5jZhT+wPn8A7x6Txw=</latexit> LLPs at LHCb Int.J.Mod.Phys. A 30,1530022 (2015) JINST 10 (2015) P06013 • unique acceptance: 2 < η < 5 • good jet reconstruction • low pile-up (~1-2 visible interaction) ‣ energy resolution ~10% for jets with p T > 10 GeV • excellent vertex resolution ( σ τ ~45 fs for B s0 ) ‣ b(c) tagging efficiency ~65%(25%) • excellent mass resolution (0.5% in µµ) for 0.3% light-parton contamination Int.J.Mod.Phys. A 30, 1530022 (2015) CMS MS LHCb LHCb 
 2< η <5 pixel silicon strip ECAL Cherenkov drift tube HCAL muon 2 Elena Dall’Occo HL/HE LHC - 04/04/2018

LLPs at LHCb • calibration + reconstruction in real time • very soft triggers: at software level (HLT): at hardware level (L0): • topological triggers on detached vertices • muons with p T > 1.5 GeV • PID and jets in trigger • calo deposits with E T > 3 GeV • excellent for light dimuons see Mike’s (prompt and detached) talk new µµ turbo trigger with online muon id requirement (no pre-scale) Phys. Rev. Lett. 120, 061801 (2018) Candidates / σ [ m ( µµ )]/ 2 7 prompt-like sample 10 LHCb p T ( µ ) > 1 GeV, p ( µ ) > 20 GeV √ s = 13 TeV 6 10 µ + µ − 5 10 µ ± µ ± 4 10 3 10 2 10 3 5 4 10 10 10 m ( µµ ) [ MeV ] Many searches for LLPs performed and ongoing! 3 Elena Dall’Occo HL/HE LHC - 04/04/2018

LHCb Upgrades ~1 visible ~5 visible interactions interactions LHCb LHCb Upgrade I LHCb Upgrade I LHCb Run 2 Run 3 Run 4 LS3 LS2 EYETS L int ~ 8 fb -1 L = 2 x 10 33 L int ~ 50 fb -1 HL-LHC Installation,ATLAS/ Injector upgrades CMS Phase 2 upgrades 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2030 2028 2028 LHCb Upgrade I LHCb Upgrade I(b): Incremental LHCb Upgrade I LHCb Upgrade I(b): incremental Installation starts improvements/prototype detectors installation starts improvements/prototype detectors Upgrade I • no hardware trigger, full software trigger with readout of the full event at 40 MHz • improved vertex resolution • momentum resolution of the tracking system ~10-20% better • reduced ghost rate will extend LHCb reach for LLPs! 4 Elena Dall’Occo HL/HE LHC - 04/04/2018

LHCb Upgrades ~1 visible ~5 visible interactions interactions LHCb LHCb Upgrade I LHCb Upgrade I LHCb Run 2 Run 3 Run 4 LS3 LS2 EYETS L int ~ 8 fb -1 L = 2 x 10 33 L int ~ 50 fb -1 HL-LHC Installation,ATLAS/ Injector upgrades CMS Phase 2 upgrades 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2030 2028 2028 LHCb Upgrade I LHCb Upgrade I(b): Incremental LHCb Upgrade I LHCb Upgrade I(b): incremental Installation starts improvements/prototype detectors installation starts improvements/prototype detectors ~50 visible interactions LHCb Upgrade II LHCb Upgrade II Upgrade II (wrt Upgrade I) LHCb Upgrade II Run 5 Run 6 Run 4 and Run 5 • 10x higher vertex multiplicity LS5 L = 1-2 x 10 34 2030 ++ LS4 L int ~ 300 fb -1 • 10x higher particle multiplicity Accumulate 300 fb -1 2040 2030 2031 2032 2033 2034 2035 Pixel timing mandatory • 10x higher radiation damage 5 Elena Dall’Occo HL/HE LHC - 04/04/2018

Detector improvements for LLPs? 6 Elena Dall’Occo HL/HE LHC - 04/04/2018

LHCb Upgrade II CERN-LHCC-2017-003 inner/middle/ outer tracker magnet timing plane side stations How LHCb might look like… (TORCH) • silicon and scintillating fibres UT micro based tracking detectors strips • new sub-detectors (magnet stations, TORCH) • high granularity ECAL with extended dynamic range • HCAL removed see Matt’s talk tomorrow VELO pixels Tracking system and trigger crucial for LLP searches! 7 Elena Dall’Occo HL/HE LHC - 04/04/2018

VELO VELO plays a fundamental role in LLP searches: • reconstruction of primary and secondary in upgrade II pixel timing vertices becomes essential to reduce vertex mis-association in the • part of the tracking system high pile up environment! • decay length accessible by LHCb ~20 cm (decay in the VELO) single PV two PVs two PVs + timing t 0 , t 0 + Δ t t 0 t 0 + Δ t e + mary mary ces: x: ambiguous clear unambiguous unambiguous ambiguous clear flight distance assignment flight distance flight distance flight distance assignment 8 Elena Dall’Occo HL/HE LHC - 04/04/2018

VELO Material CERN-LHCb-DP-2018-002 • the removal of the RF foil is under RF box at ~5 mm from the beam: study for upgrade II • < 5 mm: background dominated • it would reduce the background by heavy flavour and improve the IP resolution • > 5 mm: background mainly from • if not feasible it is crucial to veto material interaction the material interactions… …a material map of the VELO is essential to reduce the background in LLP searches! [mm] • beam-gas (helium) collisions 3 10 20 r (signed) • material interaction along the full 10 2 10 length of the VELO LHCb 0 • secondary interactions of hadrons − 10 10 used to map the material − 20 1 − 500 0 500 1000 [mm] z • analysis performed for Run1 and Run2 • method already applied successfully on a LLP analysis …repeat for next runs? (Phys. Rev. Lett. 120, 061801 (2018)) 9 Elena Dall’Occo HL/HE LHC - 04/04/2018