{"title":"Pseudorapidity Dependence of Multiplicity and Transverse Momentum Fluctuations in pp Collisions at SPS Energies","authors":"D. Prokhorova","doi":"10.18502/ken.v3i1.1747","DOIUrl":"https://doi.org/10.18502/ken.v3i1.1747","url":null,"abstract":"A search for the critical behavior of strongly interacting matter was performed at the NA61/SHINE experiment by studying event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic p+p collisions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results for the energy dependence of the scaled variance of the multiplicity distribution and for two families of strongly intensive are presented. These quantities were studied in different pseudorapidity intervals, which correspond to changing the baryon chemical potential and the temperature at the freeze-out stage. The strongly intensive measures Δ[","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"8 1","pages":"217-225"},"PeriodicalIF":0.0,"publicationDate":"2018-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89782349","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}
{"title":"Beam energy dependence of the anisotropic flow coefficients v$_n$","authors":"N. Magdy","doi":"10.22323/1.311.0005","DOIUrl":"https://doi.org/10.22323/1.311.0005","url":null,"abstract":"Recent STAR measurements of the anisotropic flow coefficients, v$_{n}$, are presented for Au+Au collisions spanning the beam energy range $sqrt{s_{NN}} = 7.7 - 200$~GeV. The measurements indicate dependences on harmonic number, $n$, transverse momentum ($p_T$), pseudorapidity ($eta$), collision centrality ($mathrm{cent}$) and beam energy ($sqrt{s_{NN}}$) which could serve as important constraints to test different initial-state models and to aid precision extraction of the temperature dependence of the specific shear viscosity.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82228349","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}
{"title":"Light-Meson Spectroscopy at GlueX","authors":"A. Austregesilo","doi":"10.1142/S2010194518600297","DOIUrl":"https://doi.org/10.1142/S2010194518600297","url":null,"abstract":"GlueX at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for light hybrid mesons. To this end, a linearly-polarized $9,$GeV photon beam impinges on a hydrogen target contained within a hermetic detector with near-complete neutral and charged particle coverage. In 2016, the experiment completed its commissioning and subsequently started to take data in its design configuration. With the size of the data set so far, GlueX already exceeds previous experiments for polarized photoproduction in this energy regime. A selection of early results will be presented, focusing on beam asymmetries for pseudo-scalar and vector mesons. The potential to make significant contributions to the field of light-meson spectroscopy is highlighted by the observation of several known meson resonances. Furthermore, the strategy to map the light meson spectrum with amplitude analysis tools will be outlined.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90432211","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}
C. Alduino, K. Alfonso, F. Avignone, O. Azzolini, G. Bari, F. Bellini, G. Benato, A. Bersani, M. Biassoni, A. Branca, C. Brofferio, C. Bucci, A. Caminata, A. Campani, L. Canonica, X. Cao, S. Capelli, L. Cappelli, L. Cardani, P. Carniti, N. Casali, L. Cassina, D. Chiesa, N. Chott, M. Clemenza, S. Copello, C. Cosmelli, O. Cremonesi, R. Creswick, J. S. Cushman, A. D’Addabbo, D. D'Aguanno, I. Dafinei, C. Davis, S. Dell’Oro, M. Deninno, S. Domizio, M. Vacri, V. Dompè, A. Drobizhev, D. Fang, M. Faverzani, E. Ferri, F. Ferroni, E. Fiorini, M. Franceschi, S. Freedman, B. Fujikawa, Andrea Giachero, L. Gironi, A. Giuliani, L. Gladstone, P. Gorla, C. Gotti, T. Gutierrez, K. Han, K. Heeger, R. Hennings-Yeomans, H. Huang, G. Keppel, Y. Kolomensky, A. Leder, C. Ligi, K. Lim, Y. Ma, L. Marini, M. Martinez, R. Maruyama, Y. Mei, N. Moggi, S. Morganti, S. Nagorny, T. Napolitano, M. Nastasi, C. Nones, E. Norman, V. Novati, A. Nucciotti, I. Nutini, T. O’Donnell, J. Ouellet, C. Pagliarone, M. Pallavicini, V. Palmieri, L. Patt
{"title":"Study of Rare Nuclear Processes with CUORE","authors":"C. Alduino, K. Alfonso, F. Avignone, O. Azzolini, G. Bari, F. Bellini, G. Benato, A. Bersani, M. Biassoni, A. Branca, C. Brofferio, C. Bucci, A. Caminata, A. Campani, L. Canonica, X. Cao, S. Capelli, L. Cappelli, L. Cardani, P. Carniti, N. Casali, L. Cassina, D. Chiesa, N. Chott, M. Clemenza, S. Copello, C. Cosmelli, O. Cremonesi, R. Creswick, J. S. Cushman, A. D’Addabbo, D. D'Aguanno, I. Dafinei, C. Davis, S. Dell’Oro, M. Deninno, S. Domizio, M. Vacri, V. Dompè, A. Drobizhev, D. Fang, M. Faverzani, E. Ferri, F. Ferroni, E. Fiorini, M. Franceschi, S. Freedman, B. Fujikawa, Andrea Giachero, L. Gironi, A. Giuliani, L. Gladstone, P. Gorla, C. Gotti, T. Gutierrez, K. Han, K. Heeger, R. Hennings-Yeomans, H. Huang, G. Keppel, Y. Kolomensky, A. Leder, C. Ligi, K. Lim, Y. Ma, L. Marini, M. Martinez, R. Maruyama, Y. Mei, N. Moggi, S. Morganti, S. Nagorny, T. Napolitano, M. Nastasi, C. Nones, E. Norman, V. Novati, A. Nucciotti, I. Nutini, T. O’Donnell, J. Ouellet, C. Pagliarone, M. Pallavicini, V. Palmieri, L. Patt","doi":"10.1142/S0217751X18430029","DOIUrl":"https://doi.org/10.1142/S0217751X18430029","url":null,"abstract":"TeO2 bolometers have been used for many years to search for neutrinoless double beta decay in 130-Te. CUORE, a tonne-scale TeO2 detector array, recently published the most sensitive limit on the half-life, $T_{1/2}^{0nu} > 1.5 times 10^{25},$yr, which corresponds to an upper bound of $140-400$~meV on the effective Majorana mass of the neutrino. While it makes CUORE a world-leading experiment looking for neutrinoless double beta decay, it is not the only study that CUORE will contribute to in the field of nuclear and particle physics. As already done over the years with many small-scale experiments, CUORE will investigate both rare decays (such as the two-neutrino double beta decay of 130-Te and the hypothesized electron capture in 123-Te), and rare processes (e.g., dark matter and axion interactions). This paper describes some of the achievements of past experiments that used TeO2 bolometers, and perspectives for CUORE.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89623535","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}
{"title":"$N-N$, $P_{T}-N$ and $P_{T}-P_{T}$ fluctuations in nucleus-nucleus collisions at the NA61/SHINE experiment","authors":"E. Andronov","doi":"10.18502/KEN.V3I1.1748","DOIUrl":"https://doi.org/10.18502/KEN.V3I1.1748","url":null,"abstract":"The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. For these goals a scan of the two dimensional phase diagram ($T-mu_{B}$) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy. This paper presents preliminary results from Be+Be collisions on pseudorapidity dependences of transverse momentum and multiplicity fluctuations expressed in terms of strongly intensive quantities. It is shown that non-trivial effects evolve from the Poissonian-like fluctuations for small pseudorapidity intervals with expansion of the acceptance. These fluctuations are supposed to be sensitive to the existence of the critical point. The results will be compared to the predictions from the EPOS model.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84921687","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}
K. Abe, K. Hiraide, K. Ichimura, Y. Kishimoto, K. Kobayashi, M. Kobayashi, S. Moriyama, M. Nakahata, T. Norita, H. Ogawa, Katsuhiko Sato, H. Sekiya, O. Takachio, A. Takeda, S. Tasaka, M. Yamashita, B. Yang, N. Y. Kim, Y. Kim, Y. Itow, K. Kanzawa, R. Kegasa, K. Masuda, H. Takiya, K. Fushimi, G. Kanzaki, K. Martens, Yoshihiro Suzuki, B. D. Xu, R. Fujita, K. Hosokawa, K. Miuchi, N. Oka, Y. Takeuchi, Y. H. Kim, K. Lee, M. Lee, Y. Fukuda, M. Miyasaka, K. Nishijima, S. Nakamura
{"title":"Improved search for two-neutrino double electron capture on $^{124}$Xe and $^{126}$Xe using particle identification in XMASS-I","authors":"K. Abe, K. Hiraide, K. Ichimura, Y. Kishimoto, K. Kobayashi, M. Kobayashi, S. Moriyama, M. Nakahata, T. Norita, H. Ogawa, Katsuhiko Sato, H. Sekiya, O. Takachio, A. Takeda, S. Tasaka, M. Yamashita, B. Yang, N. Y. Kim, Y. Kim, Y. Itow, K. Kanzawa, R. Kegasa, K. Masuda, H. Takiya, K. Fushimi, G. Kanzaki, K. Martens, Yoshihiro Suzuki, B. D. Xu, R. Fujita, K. Hosokawa, K. Miuchi, N. Oka, Y. Takeuchi, Y. H. Kim, K. Lee, M. Lee, Y. Fukuda, M. Miyasaka, K. Nishijima, S. Nakamura","doi":"10.1093/ptep/pty053","DOIUrl":"https://doi.org/10.1093/ptep/pty053","url":null,"abstract":"We conducted an improved search for the simultaneous capture of two $K$-shell electrons on the $^{124}$Xe and $^{126}$Xe nuclei with emission of two neutrinos using 800.0 days of data from the XMASS-I detector. A novel method to discriminate $gamma$-ray/$X$-ray or double electron capture signals from $beta$-ray background using scintillation time profiles was developed for this search. No significant signal was found when fitting the observed energy spectra with the expected signal and background. Therefore, we set the most stringent lower limits on the half-lives at $2.1 times 10^{22}$ and $1.9 times 10^{22}$ years for $^{124}$Xe and $^{126}$Xe, respectively, with 90% confidence level. These limits improve upon previously reported values by a factor of 4.5.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"105 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91027657","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}
{"title":"PHENIX results on three-particle Bose-Einstein correlations in $sqrt{S_{NN}} = 200$ GeV Au+Au collisions","authors":"T. Novak","doi":"10.3390/UNIVERSE4030057","DOIUrl":"https://doi.org/10.3390/UNIVERSE4030057","url":null,"abstract":"Bose-Einstein correlations of identical hadrons reveal information about hadron creation from the strongly interacting matter formed in ultrarelativistic heavy ion collisions. The measurement of three-particle correlations may in particular shed light on hadron creation mechanisms beyond thermal/chaotic emission. In this paper we show the status of PHENIX measurements of three pion correlations as a function of momentum differences within the triplets. We analyze the shape of the correlation functions through the assumption of L'evy sources and a proper treatment of the Coulomb interaction within the triplets. We measure the three-particle correlation strength ($lambda_3$), which, together with the two-particle correlation strength $lambda_2$, encodes information about hadron creation mechanisms. From a consistent analysis of two- and three-particle correlation strength we establish a new experimental measure of thermalization and coherence in the source.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82052617","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}
J. Henderson, A. Chester, G. Ball, R. Caballero-Folch, T. Domingo, T. Drake, L. Evitts, G. Hackman, S. Hallam, A. Garnsworthy, M. Moukaddam, P. Ruotsalainen, J. Smallcombe, J. Smith, K. Starosta, C. Svensson, J. Williams
{"title":"Lifetimes of low-lying excited states in $^{86}_{36}$Kr$_{50}$","authors":"J. Henderson, A. Chester, G. Ball, R. Caballero-Folch, T. Domingo, T. Drake, L. Evitts, G. Hackman, S. Hallam, A. Garnsworthy, M. Moukaddam, P. Ruotsalainen, J. Smallcombe, J. Smith, K. Starosta, C. Svensson, J. Williams","doi":"10.1103/PhysRevC.97.044311","DOIUrl":"https://doi.org/10.1103/PhysRevC.97.044311","url":null,"abstract":"The evolution of nuclear magic numbers at extremes of isospin is a topic at the forefront of contemporary nuclear physics. $N=50$ is a prime example, with increasing experimental data coming to light on potentially doubly-magic $^{100}$Sn and $^{78}$Ni at the proton-rich and proton-deficient extremes, respectively. Experimental discrepancies exist in the data for less exotic systems. In $^{86}$Kr the $B(E2;2^+_1rightarrow0^+_1)$ value - a key indicator of shell evolution - has been experimentally determined by two different methodologies, with the results deviating by $3sigma$. Here, we report on a new high-precision measurement of this value, as well as the first measured lifetimes and hence transition strengths for the $2^+_2$ and $3^-_{(2)}$ states in the nucleus. The Doppler-shift attenuation method was implemented using the TIGRESS gamma-ray spectrometer and TIGRESS integrated plunger (TIP) device. High-statistics Monte-Carlo simulations were utilized to extract lifetimes in accordance with state-of-the-art methodologies. Lifetimes of $tau(2^+_1)=336pm4text{(stat.)}pm20text{(sys.)}$ fs, $tau(2^+_2)=263pm9text{(stat.)}pm19text{(sys.)}$ fs and $tau(3^-_{(2)})=73pm6text{(stat.)}pm32text{(sys.)}$ fs were extracted. This yields a transition strength for the first-excited state of $B(E2;2^+_1rightarrow0^+)=259pm3text{(stat.)}pm16text{(sys.)}$ e$^2$fm$^4$. The measured lifetime disagrees with the previous Doppler-shift attenuation method measurement by more than $3sigma$, while agreeing well with a previous value extracted from Coulomb excitation. The newly extracted $B(E2;2^+_1rightarrow0^+_1)$ value indicates a more sudden reduction in collectivity in the $N=50$ isotones approaching $Z=40$.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84454444","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}
{"title":"Two-particle correlations in azimuthal angle and pseudorapidity in Be+Be : arXiv","authors":"B. Maksiak","doi":"10.22323/1.311.0067","DOIUrl":"https://doi.org/10.22323/1.311.0067","url":null,"abstract":"The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. These goals are to be achieved by performing a two dimensional phase diagram $(T-mu_B)$ scan by measurements of hadron production properties in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy and system size. In this contribution, the results on two-particle correlations in pseudorapidity and azimuthal angle will be presented for the first time for Be+Be interactions at beam momenta: 20, 30, 40, 75 and 150 GeV/c per nucleon. The NA61/SHINE results will be compared with the already presented results of proton-proton collisions at similar beam momenta as well as to the EPOS model results","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75842494","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}
{"title":"Fluctuations and correlations from NA61/SHINE","authors":"M. Gazdzicki","doi":"10.22323/1.311.0012","DOIUrl":"https://doi.org/10.22323/1.311.0012","url":null,"abstract":"Basic ideas, methods and results related to the NA61/SHINE study of event-by-event fluctuations in high energy nuclear collisions are briefly reviewed.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82639914","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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