In this contribution we present opportunities to address questions about the origin of mass and spin, probe the existence and nature of the LHCb pentaquark state, and probe the color Van der Waal forces among two color neutral hadrons. The key reaction is elastic production of heavy quarkonia (J/psi and Upsilon) on the nucleon from threshold to large nucleon-quarkonium invariant masses. This is possible when combining the energy range of two high luminosity facilities, Jefferson Lab 12 GeV and an electron ion collider (EIC).
{"title":"Heavy Quarkonium Production at Threshold: from JLab to EIC","authors":"S. Joosten, Z. Meziani","doi":"10.22323/1.308.0017","DOIUrl":"https://doi.org/10.22323/1.308.0017","url":null,"abstract":"In this contribution we present opportunities to address questions about the origin of mass and spin, probe the existence and nature of the LHCb pentaquark state, and probe the color Van der Waal forces among two color neutral hadrons. The key reaction is elastic production of heavy quarkonia (J/psi and Upsilon) on the nucleon from threshold to large nucleon-quarkonium invariant masses. This is possible when combining the energy range of two high luminosity facilities, Jefferson Lab 12 GeV and an electron ion collider (EIC).","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79791340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
U. Blumenschein, S. Breeze, C. Debenedetti, E. Eren, S. Gargiulo, N. Glover, J. Lindert, D. Maître, S. Malik, B. Penning, S. Pflitsch, D. Price, S. Richter, M. Schonherr, Peter Schichter, P. Torrielli, M. Ubiali, N. Wardle, A. G. Zecchinelli
This documents the proceedings from a workshop titled `Illuminating Standard candles at the LHC: V+jets' held at Imperial College London on 25th-26th April 2017. It summarises the numerous contributions to the workshop, from the experimental overview of V+jets measurements at CMS and ATLAS and their role in searching for physics beyond the Standard Model to the status of higher order perturbative calculations to these processes and their inclusion in state of the art Monte Carlo simulations. An executive summary of the ensuing discussions including a list of outcomes and wishlist for future consideration is also presented.
{"title":"Pushing the precision frontier at the LHC with V+jets","authors":"U. Blumenschein, S. Breeze, C. Debenedetti, E. Eren, S. Gargiulo, N. Glover, J. Lindert, D. Maître, S. Malik, B. Penning, S. Pflitsch, D. Price, S. Richter, M. Schonherr, Peter Schichter, P. Torrielli, M. Ubiali, N. Wardle, A. G. Zecchinelli","doi":"10.17863/CAM.20495","DOIUrl":"https://doi.org/10.17863/CAM.20495","url":null,"abstract":"This documents the proceedings from a workshop titled `Illuminating Standard candles at the LHC: V+jets' held at Imperial College London on 25th-26th April 2017. It summarises the numerous contributions to the workshop, from the experimental overview of V+jets measurements at CMS and ATLAS and their role in searching for physics beyond the Standard Model to the status of higher order perturbative calculations to these processes and their inclusion in state of the art Monte Carlo simulations. An executive summary of the ensuing discussions including a list of outcomes and wishlist for future consideration is also presented.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73020211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Belle II is a major upgrade of the Belle experiment and will operate at the $B$-factory SuperKEKB in Japan. Here we discuss the expected sensitivity of Belle II for $D^0 - bar{D}^0$ mixing and $CP$ violation measurements in the charm sector, which will benefit from a factor 50 increase in statistics and an improved vertex detection and particle identification. The impact on the determination of CKM parameters from the measurements of purely leptonic $D$ mesons decays is discussed. Finally a novel method of flavour tagging to substantially increase the sample of $D^0$ and $bar{D}^0$ is presented.
{"title":"Charm physics prospects at Belle II","authors":"G. D. Pietro","doi":"10.22323/1.314.0662","DOIUrl":"https://doi.org/10.22323/1.314.0662","url":null,"abstract":"Belle II is a major upgrade of the Belle experiment and will operate at the $B$-factory SuperKEKB in Japan. Here we discuss the expected sensitivity of Belle II for $D^0 - bar{D}^0$ mixing and $CP$ violation measurements in the charm sector, which will benefit from a factor 50 increase in statistics and an improved vertex detection and particle identification. The impact on the determination of CKM parameters from the measurements of purely leptonic $D$ mesons decays is discussed. Finally a novel method of flavour tagging to substantially increase the sample of $D^0$ and $bar{D}^0$ is presented.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82038273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-28DOI: 10.1142/S2010194518600674
W. Krzemień
LHCb continues to expand its world-leading sample of charmed hadrons collected during LHC's Run 1 (2010-2012) and Run 2 (2015-present). This sample is yielding some of the most stringent tests of the Standard Model understanding of charm physics. This includes precise measurements of the neutral D-meson mixing parameters and some of the most sensitive searches for direct and indirect CP violation in charm interactions.
{"title":"Mixing and CPV in charm hadrons at LHCb","authors":"W. Krzemień","doi":"10.1142/S2010194518600674","DOIUrl":"https://doi.org/10.1142/S2010194518600674","url":null,"abstract":"LHCb continues to expand its world-leading sample of charmed hadrons collected during LHC's Run 1 (2010-2012) and Run 2 (2015-present). This sample is yielding some of the most stringent tests of the Standard Model understanding of charm physics. This includes precise measurements of the neutral D-meson mixing parameters and some of the most sensitive searches for direct and indirect CP violation in charm interactions.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80773472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-26DOI: 10.1142/S2010194518600285
W. Krzemień
The most recent results from the KLOE experiment are presented, covering: the measurement of the running fine-structure constant alpha_em,the Dalitz plot measurement of eta to pi+pi-pi0, the search of a U boson, tests of discrete symmetries and quantum coherence. The KLOE-2 Collaboration will take data until mid 2018 aiming to collect 5 inversed fb increasing the data set, in order to produce new precision measurements and continue studies of fundamental symmetries and New Physics.
{"title":"Recent Results from KLOE-2","authors":"W. Krzemień","doi":"10.1142/S2010194518600285","DOIUrl":"https://doi.org/10.1142/S2010194518600285","url":null,"abstract":"The most recent results from the KLOE experiment are presented, covering: the measurement of the running fine-structure constant alpha_em,the Dalitz plot measurement of eta to pi+pi-pi0, the search of a U boson, tests of discrete symmetries and quantum coherence. The KLOE-2 Collaboration will take data until mid 2018 aiming to collect 5 inversed fb increasing the data set, in order to produce new precision measurements and continue studies of fundamental symmetries and New Physics.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72621493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-23DOI: 10.1142/S2010194518600819
M. Kuze
Lepton-hadron colliders that use a proton or nucleus beam of current and future hadron colliders and let it collide with an electron beam from a newly built electron accelerator bring attractive physics programs which are strong and complementary to the hadron collider physics. Machine development for Energy Recovery LINAC and physics performance studies of such electron-hadron colliders, specifically the LHeC that uses the existing LHC beam and FCC-eh that is an option of Future Circular Collider program, are ongoing and reviewed in this article.
{"title":"Energy-Frontier Lepton-Hadron Collisions at CERN: the LHeC and the FCC-eh : arXiv","authors":"M. Kuze","doi":"10.1142/S2010194518600819","DOIUrl":"https://doi.org/10.1142/S2010194518600819","url":null,"abstract":"Lepton-hadron colliders that use a proton or nucleus beam of current and future hadron colliders and let it collide with an electron beam from a newly built electron accelerator bring attractive physics programs which are strong and complementary to the hadron collider physics. Machine development for Energy Recovery LINAC and physics performance studies of such electron-hadron colliders, specifically the LHeC that uses the existing LHC beam and FCC-eh that is an option of Future Circular Collider program, are ongoing and reviewed in this article.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79207573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The COHERENT collaboration measured coherent elastic neutrino-nucleus scattering (CEvNS) for the first time at the Spallation Neutron Source at Oak Ridge National Laboratory, using a CsI[Na] detector. Here we discuss the nature of the CEvNS process, physics motivations, and experimental considerations for measuring CEvNS. We describe the CsI[Na] measurement, along with status and future of COHERENT.
{"title":"Observation of Coherent Elastic Neutrino-Nucleus Scattering by COHERENT","authors":"K. Scholberg","doi":"10.22323/1.295.0020","DOIUrl":"https://doi.org/10.22323/1.295.0020","url":null,"abstract":"The COHERENT collaboration measured coherent elastic neutrino-nucleus scattering (CEvNS) for the first time at the Spallation Neutron Source at Oak Ridge National Laboratory, using a CsI[Na] detector. Here we discuss the nature of the CEvNS process, physics motivations, and experimental considerations for measuring CEvNS. We describe the CsI[Na] measurement, along with status and future of COHERENT.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79746586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RENO (Reactor Experiment for Neutrino Oscillation) is the reactor neutrino experiment which has been taking data from August 2011 with two identical near and far detectors at Hanbit Nuclear Power Plant, Yonggwang, Korea. Using 1,500 live days of data, $sin^2 2theta_{13}$ and $|Delta m^2_{ee}|$ are updated using spectral measurements: $sin^2 2theta_{13} = 0.086 pm 0.006 ({rm stat.}) pm 0.005 ({rm syst.})$ and $|Delta m^2_{ee}| = 2.61+0.15-0.16 ({rm stat.}) pm 0.09 ({rm syst.}) (times 10^{-3} {rm eV^2})$. The 5 MeV excess dependency on the reactor thermal power rate is again clearly observed with the increased data set.
{"title":"Recent Results from RENO","authors":"M. Pac","doi":"10.22323/1.295.0038","DOIUrl":"https://doi.org/10.22323/1.295.0038","url":null,"abstract":"RENO (Reactor Experiment for Neutrino Oscillation) is the reactor neutrino experiment which has been taking data from August 2011 with two identical near and far detectors at Hanbit Nuclear Power Plant, Yonggwang, Korea. Using 1,500 live days of data, $sin^2 2theta_{13}$ and $|Delta m^2_{ee}|$ are updated using spectral measurements: $sin^2 2theta_{13} = 0.086 pm 0.006 ({rm stat.}) pm 0.005 ({rm syst.})$ and $|Delta m^2_{ee}| = 2.61+0.15-0.16 ({rm stat.}) pm 0.09 ({rm syst.}) (times 10^{-3} {rm eV^2})$. The 5 MeV excess dependency on the reactor thermal power rate is again clearly observed with the increased data set.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73060320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study of identified particle production in proton-proton (pp) collisions as a function of center-of-mass energy ($sqrt{s}$) and event charged-particle multiplicity is a key tool for understanding similarities and differences between small and large collision systems. We report on new measurements of the production of identified particles and their dependence on multiplicity and $sqrt{s}$. Latest results for light flavor hadrons, comprising $pi^{pm}$, $mathrm{K}^{pm}$, ${rm p}(rm bar{p})$, single-strange ($mathrm{K_{S}^{0}}$, $bar{Lambda}$, and $Lambda$), multi-strange ($Xi^{-}$, $overline{Xi}^{+}$, $Omega^{-}$, and $overline{Omega}^{+}$) particles as well as resonances ($mathrm{K^{*0}}$, $mathrm{overline{K}^{*0}}$, $phi$), are presented for $sqrt{s}~=~5.02, 7$, and 13 TeV. The measured minimum bias $p_{rm T}$ spectra and yields were complemented with multiplicity-dependent measurements for single- and multi-strange hadrons at $sqrt{s}~=~7$ and $sqrt{s}~=~13$ TeV. Results are compared to measurements at lower $sqrt{s}$ as well as to those in proton-lead and lead-lead (Pb-Pb) collisions, respectively at $sqrt{s}_{rm NN}~=~5.02$ TeV and $sqrt{s}_{rm NN}~=~2.76$ TeV. The results unveil intriguing similarities among collision systems at different $sqrt{s}$. The production rates of strange hadrons are found to increase more than those of non-strange particles, showing an enhancement pattern with multiplicity which does not depend on the collision energy. These yield ratios take values which are alike for small systems at comparable multiplicities and show smooth evolution with multiplicity across all collision systems. Although the multiplicity dependence of spectral shapes can be qualitatively described by general-purpose Monte Carlo (MC) event generators, the evolution of yield ratios is barely (or not) captured by MC model predictions.
{"title":"New results on the multiplicity and centre-of-mass energy dependence of identified particle production in pp collisions with ALICE","authors":"G. Bencédi","doi":"10.22323/1.314.0359","DOIUrl":"https://doi.org/10.22323/1.314.0359","url":null,"abstract":"The study of identified particle production in proton-proton (pp) collisions as a function of center-of-mass energy ($sqrt{s}$) and event charged-particle multiplicity is a key tool for understanding similarities and differences between small and large collision systems. We report on new measurements of the production of identified particles and their dependence on multiplicity and $sqrt{s}$. Latest results for light flavor hadrons, comprising $pi^{pm}$, $mathrm{K}^{pm}$, ${rm p}(rm bar{p})$, single-strange ($mathrm{K_{S}^{0}}$, $bar{Lambda}$, and $Lambda$), multi-strange ($Xi^{-}$, $overline{Xi}^{+}$, $Omega^{-}$, and $overline{Omega}^{+}$) particles as well as resonances ($mathrm{K^{*0}}$, $mathrm{overline{K}^{*0}}$, $phi$), are presented for $sqrt{s}~=~5.02, 7$, and 13 TeV. The measured minimum bias $p_{rm T}$ spectra and yields were complemented with multiplicity-dependent measurements for single- and multi-strange hadrons at $sqrt{s}~=~7$ and $sqrt{s}~=~13$ TeV. Results are compared to measurements at lower $sqrt{s}$ as well as to those in proton-lead and lead-lead (Pb-Pb) collisions, respectively at $sqrt{s}_{rm NN}~=~5.02$ TeV and $sqrt{s}_{rm NN}~=~2.76$ TeV. The results unveil intriguing similarities among collision systems at different $sqrt{s}$. The production rates of strange hadrons are found to increase more than those of non-strange particles, showing an enhancement pattern with multiplicity which does not depend on the collision energy. These yield ratios take values which are alike for small systems at comparable multiplicities and show smooth evolution with multiplicity across all collision systems. Although the multiplicity dependence of spectral shapes can be qualitatively described by general-purpose Monte Carlo (MC) event generators, the evolution of yield ratios is barely (or not) captured by MC model predictions.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81560879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Preliminary results obtained by the COMPASS experiment for longitudinal-spin-dependent azimuthal asymmetries in single-hadron muoproduction off protons are presented for the first time. The analysis was carried out on the full data sample collected by COMPASS with longitudinally polarized proton ($NH_3$) target in 2007 and 2011 using 160~gvc and 200~gvc muon beams, correspondingly. Within QCD parton model approach extracted asymmetries are giving access to the specific convolutions of certain transverse-momentum-dependent textit{twist-2} and textit{higher twist} parton distribution functions and fragmentation functions. In order to access different features of the involved distributions, the asymmetries are extracted as functions of different kinematic variables for both positive and negative single-hadron productions. The significant amount of collected data and wide kinematic range give unique importance to the results. Obtained asymmetries are compared with previous measurements performed by HERMES experiment and with available model predictions.
{"title":"Measurement of longitudinal-target-polarization dependent azimuthal asymmetries in SIDIS at COMPASS experiment","authors":"B. Parsamyan","doi":"10.22323/1.297.0259","DOIUrl":"https://doi.org/10.22323/1.297.0259","url":null,"abstract":"Preliminary results obtained by the COMPASS experiment for longitudinal-spin-dependent azimuthal asymmetries in single-hadron muoproduction off protons are presented for the first time. The analysis was carried out on the full data sample collected by COMPASS with longitudinally polarized proton ($NH_3$) target in 2007 and 2011 using 160~gvc and 200~gvc muon beams, correspondingly. Within QCD parton model approach extracted asymmetries are giving access to the specific convolutions of certain transverse-momentum-dependent textit{twist-2} and textit{higher twist} parton distribution functions and fragmentation functions. In order to access different features of the involved distributions, the asymmetries are extracted as functions of different kinematic variables for both positive and negative single-hadron productions. The significant amount of collected data and wide kinematic range give unique importance to the results. Obtained asymmetries are compared with previous measurements performed by HERMES experiment and with available model predictions.","PeriodicalId":8429,"journal":{"name":"arXiv: High Energy Physics - Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80104668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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