Date: Wed, 29 Apr 15 00:19:20 GMT Subject: hep-ex daily 3 new + 5 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-ex@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Mon 27 Apr 15 20:00:00 GMT to Tue 28 Apr 15 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1504.07450 Date: Tue, 28 Apr 2015 12:44:08 GMT (24kb) Title: Precision Measurement of $\mathcal B(\psi(3770)\to\gamma \chi_{c1})$ and Search for $\psi(3770)\to\gamma \chi_{c2}$ with $\chi_{c1,2}\to\gamma J/\psi\to\gamma\ell^+\ell^-$ Authors: BESIII Collaboration: M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, A. Amoroso, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, D. W. Bennett, J. V. Bennett, M. Bertani, D. Bettoni, J. M. Bian, F. Bianchi, E. Boger, O. Bondarenko, I. Boyko, R. A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, H. Y. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. Chen, X. R. Chen, Y. B. Chen, H. P. Cheng, X. K. Chu, G. Cibinetto, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, A. Dbeyssi, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L. Y. Dong, M. Y. Dong, S. X. Du, P. F. Duan, J. Z. Fan, J. Fang, S. S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, et al. (349 additional authors not shown) Categories: hep-ex Comments: Submitted to PRD \\ We report a measurement of the branching fraction of $\psi(3770)\to\gamma\chi_{c1}$ and search for the transition $\psi(3770)\rightarrow \gamma \chi_{c2}$ based on 2.92~fb$^{-1}$ of $e^+e^-$ data accumulated at $\sqrt{s}=3.773$~GeV with the BESIII detector at the BEPCII collider. The measured branching fraction of $\psi(3770) \rightarrow \gamma \chi_{c1}$ is $\mathcal B(\psi(3770) \rightarrow \gamma \chi_{c1})=(2.48 \pm 0.15 \pm 0.23) \times 10^{-3}$, which is the most precise measurement to date. The upper limit on the branching fraction of $\psi(3770)\rightarrow \gamma \chi_{c2}$ at a $90\%$ confidence level is $\mathcal B(\psi(3770) \rightarrow \gamma \chi_{c2})<0.64 \times 10^{-3}$. The corresponding partial widths are $\Gamma(\psi(3770) \to \gamma \chi_{c1}) =(67.5\pm 4.1\pm 6.7)$~keV and $\Gamma(\psi(3770) \to \gamma \chi_{c2}) < 17.4$~keV. \\ ( http://arxiv.org/abs/1504.07450 , 24kb) ------------------------------------------------------------------------------ \\ arXiv:1504.07451 Date: Tue, 28 Apr 2015 12:46:30 GMT (68kb,D) Title: Measurement of parity-violating spin asymmetries in W$^{\pm}$ production at midrapidity in longitudinally polarized $p$$+$$p$ collisions Authors: A. Adare, C. Aidala, N.N. Ajitanand, Y. Akiba, R. Akimoto, J. Alexander, M. Alfred, K. Aoki, N. Apadula, Y. Aramaki, H. Asano, E.C. Aschenauer, E.T. Atomssa, T.C. Awes, B. Azmoun, V. Babintsev, M. Bai, X. Bai, N.S. Bandara, B. Bannier, K.N. Barish, B. Bassalleck, S. Bathe, V. Baublis, C. Baumann, S. Baumgart, A. Bazilevsky, M. Beaumier, S. Beckman, R. Belmont, A. Berdnikov, Y. Berdnikov, D. Black, D.S. Blau, J.S. Bok, K. Boyle, M.L. Brooks, J. Bryslawskyj, H. Buesching, V. Bumazhnov, S. Butsyk, S. Campbell, C.-H. Chen, C.Y. Chi, M. Chiu, I.J. Choi, J.B. Choi, S. Choi, R.K. Choudhury, P. Christiansen, T. Chujo, O. Chvala, V. Cianciolo, Z. Citron, B.A. Cole, M. Connors, N. Cronin, N. Crossette, M. Csan\'ad, T. Cs\"org\H{o}, S. Dairaku, D. Danley, A. Datta, M.S. Daugherity, G. David, K. DeBlasio, et al. (386 additional authors not shown) Categories: hep-ex Comments: 451 authors, 8 pages, 3 figures, 2 tables. Submitted to Phys. Rev. D, Rapid Communications. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html \\ We present measurements from the PHENIX experiment of large parity-violating single spin asymmetries of high transverse momentum electrons and positrons from $W^\pm/Z$ decays, produced in longitudinally polarized $p$$+$$p$ collisions at center of mass energies of $\sqrt{s}$=500 and 510~GeV. These asymmetries allow direct access to the anti-quark polarized parton distribution functions due to the parity-violating nature of the $W$-boson coupling to quarks and anti-quarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb$^{-1}$, which exceeds previous PHENIX published results by a factor of more than 27. These high $Q^2$ data provide an important addition to our understanding of anti-quark parton helicity distribution functions. \\ ( http://arxiv.org/abs/1504.07451 , 68kb) ------------------------------------------------------------------------------ \\ arXiv:1504.07496 Date: Tue, 28 Apr 2015 14:27:55 GMT (2222kb) Title: Searches for Active and Sterile Neutrinos in Beta-Ray Spectra Authors: Otokar Dragoun, Drahoslav V\'enos Categories: hep-ex physics.ins-det Comments: 40 pages, 31 figures, review article \\ Although neutrinos are probably the most abundant particles of the universe their mass is yet unknown. The oscillation experiments proved that at least one of the neutrino mass states is heavier than 0.05 eV. Strongly model dependent interpretations of cosmological observations yielded for the sum of the neutrino mass states the values between 0.12 and 1.7 eV. The almost model independent analyses of measured tritium \b{eta}- spectra provided the upper limit of the effective electron neutrino mass of 2 eV. The upcoming KATRIN experiment aims to achieve ten times higher sensitivity. In this review, we try to summarize the experience of two generations of \b{eta}-ray spectroscopists who improved the limit of the neutrino mass by three orders of magnitude. We describe important steps in the development of radioactive sources and electron spectrometers, and recapitulate the lessons from now disproved claims for the neutrino of 30 eV mass and the 17 keV neutrino with an admixture larger than 0.07 %. We also pay attention to new experimental approaches as well as to searches for hypothetical eV and keV sterile neutrinos. \\ ( http://arxiv.org/abs/1504.07496 , 2222kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1504.07237 (*cross-listing*) Date: Mon, 27 Apr 2015 20:00:30 GMT (1921kb,D) Title: Superconducting Detectors for Super Light Dark Matter Authors: Yonit Hochberg, Yue Zhao, Kathryn M. Zurek Categories: hep-ph astro-ph.CO hep-ex Comments: 5 pages, 2 figures \\ We propose and study a new class of of superconducting detectors which are sensitive to O(meV) electron recoils from dark matter-electron scattering. Such devices could detect dark matter as light as the warm dark matter limit, mX > keV. We compute the rate of dark matter scattering off free electrons in a (superconducting) metal, including the relevant Pauli blocking factors. We demonstrate that classes of dark matter consistent with all astrophysical and terrestrial constraints could be detected by such detectors with a moderate size exposure. \\ ( http://arxiv.org/abs/1504.07237 , 1921kb) ------------------------------------------------------------------------------ \\ arXiv:1504.07244 (*cross-listing*) Date: Mon, 27 Apr 2015 20:01:06 GMT (92kb,D) Title: Baryon Number Violation via Majorana Neutrinos in the Early Universe, at the LHC, and Deep Underground Authors: Hooman Davoudiasl, Yue Zhang Categories: hep-ph hep-ex Comments: 5 pages, 3 figures Report-no: CALT-TH-2015-023 \\ We propose and investigate a novel, minimal, and experimentally testable framework for baryogenesis, dubbed dexiogenesis, using baryon number violating effective interactions of right-handed Majorana neutrinos responsible for the seesaw mechanism. The distinct LHC signature of our framework is same-sign top quark final states, possibly originating from displaced vertices. The region of parameters relevant for LHC phenomenology can also yield concomitant signals in nucleon decay experiments. We provide a simple ultraviolet origin for our effective operators, by adding a color-triplet scalar, which could ultimately arise from a grand unified theory. \\ ( http://arxiv.org/abs/1504.07244 , 92kb) ------------------------------------------------------------------------------ \\ arXiv:1504.07346 (*cross-listing*) Date: Tue, 28 Apr 2015 05:17:55 GMT (1246kb) Title: Comparative production of the scalar and tensor mesons in $\gamma\gamma^*(Q^2)\to \eta\pi^0$ reaction Authors: N.N. Achasov, A.V. Kiselev, G.N. Shestakov Categories: hep-ph hep-ex nucl-th Comments: 26 pages, 12 figures \\ The prediction of the cross section $\sigma(\gamma\gamma^*(Q^2)\to \eta\pi^0)$ based on the simultaneous description of the Belle data on the $\gamma\gamma\to \eta\pi^0$ reaction and the KLOE data on the $\phi\to\eta\pi^0\gamma$ decay is presented. \\ ( http://arxiv.org/abs/1504.07346 , 1246kb) ------------------------------------------------------------------------------ \\ arXiv:1504.07428 (*cross-listing*) Date: Tue, 28 Apr 2015 11:09:09 GMT (52kb,D) Title: Quarkonium suppression from coherent energy loss in fixed-target experiments using LHC beams Authors: Fran\c{c}ois Arleo, St\'ephane Peign\'e Categories: hep-ph hep-ex nucl-th Comments: 7 pages, 2 figures \\ Quarkonium production in proton-nucleus collisions is a powerful tool to disentangle cold nuclear matter effects. A model based on coherent energy loss is able to explain the available quarkonium suppression data in a broad range of rapidities, from fixed-target to collider energies, suggesting cold energy loss to be the dominant effect in quarkonium suppression in p-A collisions. This could be further tested in a high-energy fixed-target experiment using a proton or nucleus beam. The nuclear modification factors of J/$\psi$ and $\Upsilon$ as a function of rapidity are computed in p-A collisions at $\sqrt{s}=114.6$ GeV, and in p-Pb and Pb-Pb collisions at $\sqrt{s}=72$ GeV. These center-of-mass energies correspond to the collision on fixed-target nuclei of 7 TeV protons and 2.76 TeV lead nuclei available at the LHC. \\ ( http://arxiv.org/abs/1504.07428 , 52kb) ------------------------------------------------------------------------------ \\ arXiv:1504.07574 (*cross-listing*) Date: Tue, 28 Apr 2015 17:15:58 GMT (475kb) Title: Electroweak corrections to $Z$-boson hadroproduction at finite transverse momentum Authors: W. Hollik, B. A. Kniehl, E. S. Shcherbakova, O. L. Veretin Categories: hep-ph hep-ex Comments: 28 pages, 11 figures Report-no: DESY 14-110, MPP-2015-94 \\ We calculate the full one-loop electroweak radiative corrections, of ${\cal O}(\alpha^2\alpha_s)$, to the cross section of single $Z$-boson inclusive hadroproduction at finite transverse momentum ($p_T$). This includes the ${\cal O}(\alpha)$ corrections to $Z+j$ production, the ${\cal O}(\alpha_s)$ corrections to $Z+\gamma$ production, and certain QCD-electroweak interference contributions involving a single quark trace. We present $p_T$ and rapidity distributions for the experimental conditions at the Fermilab Tevatron and the CERN LHC, and compare the electromagnetic and purely weak corrections with the QCD ones at next-to-leading order. \\ ( http://arxiv.org/abs/1504.07574 , 475kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1407.3465 (*cross-listing*) replaced with revised version Tue, 28 Apr 2015 08:17:52 GMT (113kb) Title: Photoproduction of the omega meson off the proton near threshold Authors: I.I. Strakovsky, S. Prakhov, Ya.I. Azimov, P. Aguar-Bartolome, J.R.M. Annand, H.J. Arends, K. Bantawa, R. Beck, V. Bekrenev, H. Berghaeuser, A. Braghieri, W.J. Briscoe, J. Brudvik, S. Cherepnya, R.F.B. Codling, C. Collicott, S. Costanza, B.T. Demissie, E.J. Downie, P. Drexler, L.V. Fil'kov, D.I. Glazier, R. Gregor, D.J. Hamilton, E. Heid, D. Hornidge, I. Jaegle, O. Jahn, T.C. Jude, V.L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, M. Kotulla, A. Koulbardis, S. Kruglov, B. Krusche, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, D.M. Manley, Z. Marinides, J.C. McGeorge, E.F. McNicoll, D. Mekterovic, V. Metag, D.G. Middleton, A. Mushkarenkov, B.M.K. Nefkens, A. Nikolaev, R. Novotny, H. Ortega, M. Ostrick, P.B. Otte, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, A. Starostin, I. Supek, M.F. Taragin, C.M. Tarbert, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts, D. Werthmueller, and F. Zehr Categories: nucl-ex hep-ex hep-ph Comments: 5 pages, 3 figures. Published version \\ ( http://arxiv.org/abs/1407.3465 , 113kb) ------------------------------------------------------------------------------ \\ arXiv:1408.6865 (*cross-listing*) replaced with revised version Tue, 28 Apr 2015 12:58:45 GMT (825kb,D) Title: Handling uncertainties in background shapes: the discrete profiling method Authors: P. D. Dauncey, M. Kenzie, N. Wardle and G. J. Davies Categories: physics.data-an hep-ex Comments: Accepted by J.Inst \\ ( http://arxiv.org/abs/1408.6865 , 825kb) ------------------------------------------------------------------------------ \\ arXiv:1409.0832 replaced with revised version Tue, 28 Apr 2015 11:26:41 GMT (354kb) Title: Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at $\sqrt{s}=7$ TeV Authors: ATLAS Collaboration Categories: hep-ex Comments: 14 pages plus author list + cover pages (28 pages total), 6 figures, 4 tables, submitted to Eur. Phys. J. C. All figures, including auxiliary figures, are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-03/ Report-no: CERN-PH-EP-2014-208 Journal-ref: Eur. Phys. J. C (2015) 75:158 DOI: 10.1140/epjc/s10052-015-3373-1 \\ ( http://arxiv.org/abs/1409.0832 , 354kb) ------------------------------------------------------------------------------ \\ arXiv:1412.3671 (*cross-listing*) replaced with revised version Tue, 28 Apr 2015 14:07:47 GMT (3697kb,D) Title: Higgs $\to \mu \tau$ in Abelian and Non-Abelian Flavor Symmetry Models Authors: Julian Heeck, Martin Holthausen, Werner Rodejohann, Yusuke Shimizu Categories: hep-ph hep-ex Comments: 33 pages, 11 figures; more references and comments, fewer typos; accepted by NPB Report-no: ULB-TH/14-17 \\ ( http://arxiv.org/abs/1412.3671 , 3697kb) ------------------------------------------------------------------------------ \\ arXiv:1501.01325 replaced with revised version Tue, 28 Apr 2015 01:19:43 GMT (508kb,D) Title: Search for Scalar Charm Quark Pair Production in pp Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector Authors: ATLAS Collaboration Categories: hep-ex Comments: Comments: 6 pages plus author list + cover page (20 pages total), 2 figures, 1 table, submitted to Phys. Rev. Lett., All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2014-03 Report-no: CERN-PH-EP-2014-292 Journal-ref: Phys. Rev. Lett. 114, 161801 (2015) DOI: 10.1103/PhysRevLett.114.161801 \\ ( http://arxiv.org/abs/1501.01325 , 508kb) ------------------------------------------------------------------------------ \\ arXiv:1502.01213 (*cross-listing*) replaced with revised version Tue, 28 Apr 2015 14:04:53 GMT (2063kb) Title: Wbbj production at NLO with POWHEG+MiNLO Authors: Gionata Luisoni, Carlo Oleari, Francesco Tramontano Categories: hep-ph hep-ex Comments: Version as accepted for publication. Added references, one table and one figure. All the rest is the same as version 1 \\ ( http://arxiv.org/abs/1502.01213 , 2063kb) ------------------------------------------------------------------------------ \\ arXiv:1503.07964 (*cross-listing*) replaced with revised version Mon, 27 Apr 2015 20:48:35 GMT (176kb) Title: Predictions From High Scale Mixing Unification Hypothesis Authors: Rahul Srivastava Categories: hep-ph hep-ex Comments: 10 pages, 8 figures, Typos corrected, Reference added, Results and Conclusions unchanged, Contribution to the proceedings of UNICOS-2014 \\ ( http://arxiv.org/abs/1503.07964 , 176kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arxiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arxiv.org/help/