Date: Thu, 29 Oct 15 00:20:31 GMT Subject: hep-ex daily 5 new + 11 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 Tue 27 Oct 15 20:00:00 GMT to Wed 28 Oct 15 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1510.08127 Date: Tue, 27 Oct 2015 23:19:14 GMT (1354kb,D) Title: Measurements of the atmospheric neutrino flux by Super-Kamiokande: energy spectra, geomagnetic effects, and solar modulation Authors: E. Richard, K. Okumura, K. Abe, Y. Haga, Y. Hayato, M. Ikeda, K. Iyogi, J. Kameda, Y. Kishimoto, M. Miura, S. Moriyama, M. Nakahata, T. Nakajima, Y. Nakano, S. Nakayama, A. Orii, H. Sekiya, M. Shiozawa, A. Takeda, H. Tanaka, T. Tomura, R. A. Wendell, R. Akutsu, T. Irvine, T. Kajita, K. Kaneyuki, Y. Nishimura, L. Labarga, P. Fernandez, J. Gustafson, C. Kachulis, E. Kearns, J. L. Raaf, J. L. Stone, L. R. Sulak, S. Berkman, C. M. Nantais, H. A. Tanaka, S. Tobayama, M. Goldhaber, W. R. Kropp, S. Mine, P. Weatherly, M. B. Smy, H. W. Sobel, V. Takhistov, K. S. Ganezer, B. L. Hartfiel, J. Hill, N. Hong, J. Y. Kim, I. T. Lim, R. G. Park, A. Himmel, Z. Li, E. OSullivan, K. Scholberg, C. W. Walter, T. Wongjirad, T. Ishizuka, S. Tasaka, J. S. Jang, J. G. Learned, S. Matsuno, S. N. Smith, M. Friend, T. Hasegawa, et al. (62 additional authors not shown) Categories: hep-ex astro-ph.HE astro-ph.SR physics.ins-det Comments: 30 pages, 31 figures \\ A comprehensive study on the atmospheric neutrino flux in the energy region from sub-GeV up to several TeV using the Super-Kamiokande water Cherenkov detector is presented in this paper. The energy and azimuthal spectra of the atmospheric ${\nu}_e+{\bar{\nu}}_e$ and ${\nu}_{\mu}+{\bar{\nu}}_{\mu}$ fluxes are measured. The energy spectra are obtained using an iterative unfolding method by combining various event topologies with differing energy responses. The azimuthal spectra depending on energy and zenith angle, and their modulation by geomagnetic effects, are also studied. A predicted east-west asymmetry is observed in both the ${\nu}_e$ and ${\nu}_{\mu}$ samples at 8.0 {\sigma} and 6.0 {\sigma} significance, respectively, and an indication that the asymmetry dipole angle changes depending on the zenith angle was seen at the 2.2 {\sigma} level. The measured energy and azimuthal spectra are consistent with the current flux models within the estimated systematic uncertainties. A study of the long-term correlation between the atmospheric neutrino flux and the solar magnetic activity cycle is also performed, and a weak indication of a correlation was seen at the 1.1 {\sigma} level, using SK I-IV data spanning a 20 year period. For particularly strong solar activity periods known as Forbush decreases, no theoretical prediction is available, but a deviation below the typical neutrino event rate is seen at the 2.4 {\sigma} level. \\ ( http://arxiv.org/abs/1510.08127 , 1354kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08284 Date: Wed, 28 Oct 2015 12:34:43 GMT (286kb,D) Title: FCC based ep and \mu p colliders Authors: Y. C. Acar, U. Kaya, B. B. Oner and S. Sultansoy Categories: hep-ex hep-ph physics.acc-ph Comments: 9 pages, 1 figure, 6 tables \\ Construction of future electron-positron colliders (or dedicated electron linac) and muon colliders close to Future Circular Collider will give opportunity to utilize highest energy proton and nucleus beams for lepton-hadron and photon-hadron collisions. In this paper we estimate main parameters of the FCC based ep and \mu p colliders. \\ ( http://arxiv.org/abs/1510.08284 , 286kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08342 Date: Wed, 28 Oct 2015 15:23:01 GMT (53kb,D) Title: Electron neutrino charged-current quasielastic scattering in the MINERvA experiment Authors: Jeremy Wolcott, for the MINERvA collaboration Categories: hep-ex Comments: Presentation at the DPF 2015 Meeting of the American Physical Society Division of Particles and Fields, Ann Arbor, Michigan, August 4-8, 2015 \\ The electron-neutrino charged-current quasielastic (CCQE) cross section on nuclei is an important input parameter to appearance-type neutrino oscillation experiments. Current experiments typically work from the muon neutrino cross section and apply corrections from theoretical arguments to obtain a prediction for the electron neutrino cross section, but to date there has been no experimental verification of the estimates for this channel at an energy scale appropriate to such experiments. We present the first measurement of an exclusive reaction in few-GeV electron neutrino interactions, namely, the cross section for a CCQE-like process, made using the MINERvA detector. The result is given as differential cross-sections vs. the electron energy, electron angle, and square of the four-momentum transferred to the nucleus, $Q^2$. We also compute the ratio to a muon neutrino cross-section in $Q^2$ from MINERvA. We find satisfactory agreement between this measurement and the predictions of the GENIE generator. \\ ( http://arxiv.org/abs/1510.08342 , 53kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08367 Date: Wed, 28 Oct 2015 16:21:06 GMT (253kb,D) Title: First observation of the decay $D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$ in the $\rho^{0}$-$\omega$ region of the dimuon mass spectrum Authors: LHCb collaboration: R. Aaij, C. Abell\'{a}n Beteta, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, G. Andreassi, M. Andreotti, J.E. Andrews, R.B. Appleby, O. Aquines Gutierrez, F. Archilli, P. d'Argent, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J.J. Back, A. Badalov, C. Baesso, W. Baldini, R.J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, L.J. Bel, V. Bellee, N. Belloli, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin, M.-O. Bettler, M. van Beuzekom, A. Bien, et al. (672 additional authors not shown) Categories: hep-ex Comments: 21 pages, 2 figures. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-043.html Report-no: LHCb-PAPER-2015-043, CERN-PH-EP-2015-283 \\ A study of the decay $D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$ is performed using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb$^{-1}$. Decay candidates with muon pairs that have an invariant mass in the range 675--875 MeV$/c^2$ are considered. This region is dominated by the $\rho^{0}$ and $\omega$ resonances. The branching fraction in this range is measured to be ${\cal B}$($D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$ ) = $( 4.17 \pm 0.12(stat) \pm 0.40(syst) )\times10^{-6}$. This is the first observation of the decay $D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$. Its branching fraction is consistent with the value expected in the Standard Model. \\ ( http://arxiv.org/abs/1510.08367 , 253kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08431 Date: Wed, 28 Oct 2015 19:37:10 GMT (219kb,D) Title: Opportunities With Decay-At-Rest Neutrinos From Decay-In-Flight Neutrino Beams Authors: Christopher Grant and Bryce Littlejohn Categories: hep-ex hep-ph nucl-ex physics.ins-det Comments: 6 pages, 3 figures \\ Neutrino beam facilities, like spallation neutron facilities, produce copious quantities of neutrinos from the decay at rest of mesons and muons. The viability of decay-in-flight neutrino beams as sites for decay-at-rest neutrino studies has been investigated by calculating expected low-energy neutrino fluxes from the existing Fermilab NuMI beam facility. Decay-at-rest neutrino production in NuMI is found to be roughly equivalent per megawatt to that of spallation facilities, and is concentrated in the facility's target hall and beam stop regions. Interaction rates in 5 and 60~ton liquid argon detectors at a variety of existing and hypothetical locations along the beamline are found to be comparable to the largest existing decay-at-rest datasets for some channels. The physics implications and experimental challenges of such a measurement are discussed, along with prospects for measurements at targeted facilities along a future Fermilab long-baseline neutrino beam. \\ ( http://arxiv.org/abs/1510.08431 , 219kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1507.03541 (*cross-listing*) Date: Mon, 13 Jul 2015 18:31:35 GMT (18kb) Date (revised v2): Mon, 26 Oct 2015 15:08:53 GMT (30kb) Date (revised v3): Tue, 27 Oct 2015 16:41:22 GMT (30kb) Title: Origin of Constrained Maximal CP Violation in Flavor Symmetry Authors: Hong-Jian He, Werner Rodejohann and Xun-Jie Xu Categories: hep-ph hep-ex Comments: Phys.Lett.B Final Version, 13pp. All conclusions unchanged, only minor improvement to stress the parametrization-independence of our CMCPV \\ Current data from neutrino oscillation experiments are in good agreement with $\delta =-\frac{\pi}{2}$ and $\theta_{23}^{} = \frac{\pi}{4}$. We define the notion of "constrained maximal CP violation" (CMCPV) for predicting these features and study their origin in flavor symmetry. We derive the parametrization-independent solution of CMCPV and give a set of equivalent definitions for it. We further present a theorem on how the CMCPV can be realized. This theorem takes advantage of residual symmetries in the neutrino and charged lepton mass matrices, and states that, up to a few minor exceptions, $(|\delta |, \theta_{23}) =(\frac{\pi}{2}, \frac{\pi}{4})$ is generated when those symmetries are real. The often considered $\mu$-$\tau$ reflection symmetry, as well as specific discrete subgroups of O(3), are special cases of our theorem. \\ ( http://arxiv.org/abs/1507.03541 , 30kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08083 (*cross-listing*) Date: Tue, 27 Oct 2015 20:19:24 GMT (580kb,D) Title: A 2 TeV $W_R$, Supersymmetry, and the Higgs Mass Authors: Jack H Collins, Wee Hao Ng Categories: hep-ph hep-ex Comments: 30 pages, 9 figures \\ A recent ATLAS search for diboson resonances and a CMS search for $eejj$ resonances which both show excesses with significance around $3 \sigma$ have generated interest in $SU(2)_R$ gauge extensions of the Standard Model with a $W'$ mass around 2 TeV. We investigate the possibility that an $SU(2)_R$ gauge extension of the MSSM compatible with an explanation of the diboson anomaly might give rise to a significant enhancement of the Higgs mass above the MSSM tree level bound $m_{h, \text{tree}} < 90 \; \text{GeV}$ due to non-decoupling $D$-terms. This model contains a vector-like charge $-1/3$ $SU(2)_R$ singlet quark for each generation which mixes significantly with the $SU(2)_R$ doublet quarks, affecting the $W_R$ phenomenology. We find that it is possible to achieve $m_{h, \text{tree}} > 110 \; \text {GeV}$, and this requires that the $Z'$ mass is close to 3 TeV. \\ ( http://arxiv.org/abs/1510.08083 , 580kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08141 (*cross-listing*) Date: Wed, 28 Oct 2015 00:40:33 GMT (155kb,D) Title: Prospects for $\gamma \gamma \to H$ and $\gamma \gamma \to W^{+}W^{-}$ measurements at the FCC-ee Authors: Patricia Rebello Teles and David d'Enterria Categories: hep-ph hep-ex Comments: Proceedings of the conference PHOTON 2015: International Conference on the Structure and the Interactions of the Photon including the 21th International Workshop on Photon-Photon Collisions and the International Workshop on High Energy Photon Colliders, held at Budker Institute of Nuclear Physics (BINP), Siberian Branch of Russian Academy of Science, Novosibirsk, Russia, from 15 to 19 June, 2015 \\ We study the possibilities for the measurement of two-photon production of the Higgs boson (in the $b \bar{b}$ decay channel), and of $W^{+}W^{-}$ pairs (decaying into four jets) in $e^{+}e^{-}$ collisions at the the Future Circular Collider (FCC-ee). The processes are simulated with the PYTHIA and MADGRAPH 5 Monte Carlo codes, using the effective photon approximation for the $e^{+}e^{-}$ photon fluxes, at center-of-mass energies $\sqrt{s} = $ 160 GeV and 240 GeV. The analyses include electron-positron tagging, realistic acceptance and reconstruction efficiencies for the final-state jets, and selection criteria to remove the backgrounds. Observation of both channels is achievable with the expected few ab$^{-1}$ integrated luminosities at FCC-ee. \\ ( http://arxiv.org/abs/1510.08141 , 155kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08167 (*cross-listing*) Date: Wed, 28 Oct 2015 02:36:05 GMT (4380kb) Title: Upgrade of Beam Energy Measurement System at BEPC-II Authors: Jian-Yong Zhang, Xiao Cai, Xiao-Hu Mo, Di-Zhou Guo, Jian-Li Wang, Bai-Qi Liu, M. N. Achasov, A. A. Krasnov, N.Yu. Muchnoi, E. E. Pyata, E. V. Mamoshkina, F. A. Harris Categories: physics.ins-det hep-ex Comments: 10 pages, 9 figures. Submitted to Chinese Physics C \\ The beam energy measurement system is of great importance and profit for both BEPC-II accelerator and BES-III detector. The system is based on measuring the energies of Compton back-scattered photons. Many advanced techniques and precise instruments are employed to realize the highly accurate measurement of positron/electron beam energy. During five year's running period, in order to meet the requirement of data taking and improve the capacity of measurement itself, the upgradation of system is continued, which involve the component reformation of laser and optics subsystem, replacement of view-port of the laser to vacuum insertion subsystem, the purchase of electric cooling system for high purity germanium detector, and the improvement of data acquisition and processing subsystem. The upgrading of system guarantees the smooth and efficient measuring of beam energy at BEPC-II and accommodates the accurate offline energy values for further physics analysis at BES-III. \\ ( http://arxiv.org/abs/1510.08167 , 4380kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08184 (*cross-listing*) Date: Wed, 28 Oct 2015 04:04:34 GMT (330kb) Title: Conformal Barrier and Hidden Local Symmetry Constraints: Walking Technirhos in LHC Diboson Channels Authors: Hidenori S. Fukano, Shinya Matsuzaki, Koji Terashi and Koichi Yamawaki Categories: hep-ph hep-ex Comments: latex, 12 eps figures, 35 pages \\ We expand the previous analyses of the conformal barrier on the walking technirho for the 2 TeV diboson excesses reported by the ATLAS collaboration, with a special emphasis on the hidden local symmetry (HLS) constraints. The scale symmetry forbids the new vector boson decay to the 125 GeV Higgs plus $W/Z$ boson, in sharp contrast to the conventional "equivalence theorem" which is invalidated by the conformality. The HLS forbids mixing between the iso-triplet technirho's, $\rho_{\Pi}$ and $\rho_{P}$, of the one-family walking technicolor (with four doublets $N_D=N_F/2=4$), which, without the HLS, would be generated when switching on the standard model gauging. We also present updated analyses of the walking technrho's for the diboson excesses by fully incorporating the constraints from the conformal barrier and the HLS as well as possible higher order effects: still characteristic of the one-family walking technirho is its smallness of the decay width, roughly of order $\Gamma/M_\rho \sim [3/N_C\times 1/N_D] \times [\Gamma/M_\rho]_{\rm QCD} \, \simeq 70\, {\rm GeV}/2\,{\rm TeV}$ ($N_D= N_C=4$), in perfect agreement with the expected diboson resonance with $\Gamma<100\, {\rm GeV}$. The model is so sharply distinguishable from other massive spin 1 models without the conformality and HLS that it is clearly testable at the LHC Run II. If the 2 TeV boson decay to $WH/ZH$ is not observed in the ongoing Run II, then the conformality is operative on the 125 GeV Higgs, strongly suggesting that the 2 TeV excess events are responsible for the walking technirhos and the 125 GeV Higgs is the technidilaton. \\ ( http://arxiv.org/abs/1510.08184 , 330kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08239 (*cross-listing*) Date: Wed, 28 Oct 2015 09:35:06 GMT (3984kb,D) Title: Recent results from NA61/SHINE on spectra and correlations in p+p and Be+Be interactions at the CERN SPS Authors: Andrzej Wilczek, for the NA61/SHINE Collaboration Categories: nucl-ex hep-ex Comments: 14 pages, 12 figures, Proceedings (ICPAQGP-2015 - 7th International Conference on Physics and Astrophysics of Quark Gluon Plasma) \\ The problem of pinning down the critical point of strongly interacting matter still puzzles the community. One of the answers suspected to emerge in the near future will surely come from NA61/SHINE - a fixed-target experiment aiming to discover the critical point as well as to study the properties of the onset of deconfinement. This goal will be pursued by obtaining precise data on hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions in a wide range of system size and collision energy. This contribution presents new results on inclusive spectra of identified hadrons and on fluctuations in inelastic p+p and Be+Be interactions at the SPS energies. These are compared with the world data, in particular with the corresponding measurements of NA49 for central Pb+Pb collisions as well as with some model predictions. \\ ( http://arxiv.org/abs/1510.08239 , 3984kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08269 (*cross-listing*) Date: Wed, 28 Oct 2015 11:53:43 GMT (134kb) Title: Radiative transitions of charmonium states Authors: Wei-Jun Deng, Li-Ye Xiao, Long-Cheng Gui, and Xian-Hui Zhong Categories: hep-ph hep-ex nucl-th Comments: 17 pages, 6 figures and five tables \\ We systematically study the electromagnetic transitions of the $nS$, $nP$ ($n\leq 3$), and $nD$ ($n\leq 2$) charmonium states with a constituent quark model. Without introducing any free parameters, we obtain a reasonable description of the electromagnetic transitions of the well-established low-lying charmonium states $J/\psi$, $\psi(2S)$, $\chi_{cJ}(1P)$, $h_c(1P)$ and $\psi(3770)$. Our predictions of electromagnetic decay properties for the higher charmonium states are also presented and compared with other model predictions. It is found that some of our predictions are notably different from those of other models, which should be tested in future experiments. In particular, considering the $X(3872)$ resonance as the $\chi_{c1}(2P)$ state, we study its electromagnetic decay properties. Our predicted ratio $\Gamma[X(3872)\to \psi(2S)\gamma]/\Gamma[X(3872)\to J/\psi \gamma]\simeq 4.0$ is consistent with BaBar's measurement. We hope that our study could be useful to understand the electromagnetic decay properties of the discovered charmonium states, and also helpful to look for the missing charmonium states through the electromagnetic transitions. \\ ( http://arxiv.org/abs/1510.08269 , 134kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08305 (*cross-listing*) Date: Wed, 28 Oct 2015 13:42:07 GMT (174kb,D) Title: Properties of Excited Charm and Charm-Strange Mesons Authors: Stephen Godfrey and Kenneth Moats (Carleton University) Categories: hep-ph hep-ex Comments: 36 pages, 2 figures, 47 tables, more detailed results included as supplementary file \\ We calculate the properties of excited charm and charm-strange mesons. We use the relativized quark model to calculate their masses and wavefunctions that we use to calculate radiative transition partial widths and the $^3P_0$ quark-pair-creation model to calculate their strong decay widths. We use these results to make quark model spectroscopic assignments to recently observed charm and charm-strange mesons. In particular we find that the properties of the $D_J(2550)^0$ and $D^*(2600)^0$ are consistent with those of the $2^1S_0(c\bar{u})$ and the $2^3S_1(c\bar{u})$ states respectively, the $D_1^*(2760)^0$, $D_3^*(2760)^0$, and $D_J(2750)^0$ with those of the $1^3D_1(c\bar{q})$, $1^3D_3(c\bar{u})$, and $1D_2(c\bar{u})$ states respectively. We tentatively identify the $D^*_J(3000)^0$ as the $1^3F_4(c\bar{u})$ and favour the $D_J(3000)^0$ to be the $3^1S_0(c\bar{u})$ although we do not rule out the $1F_3$ and $1F_3'$ assignment. For the recently observed charm-strange mesons we identify the $D_{s1}^*(2709)^\pm$, $D_{s1}^*(2860)^-$, and $D_{s3}^*(2860)^-$ as the $2^3S_1(c\bar{s})$, $1^3D_1(s\bar{c})$, and $1^3D_3(s\bar{c})$ respectively and suggest that the $D_{sJ}^*(3044)^\pm$ is most likely the $D_{s1}(2P_1')$ or $D_{s1}(2P_1)$ although it might be the $D_{s2}^*(2^3P_2)$ with the $DK$ final state too small to be observed with current statistics. Based on the predicted properties of excited states, that they not have too large a total width and they have a reasonable branching ratio to simple final states, we suggest states that should be able to be found in the near future. We expect that the tables of properties summarizing our results will be useful for interpreting future observations of charm and charm-strange mesons. \\ ( http://arxiv.org/abs/1510.08305 , 174kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08306 (*cross-listing*) Date: Wed, 28 Oct 2015 13:42:07 GMT (2915kb,D) Title: Electron-Muon Ranger: performance in the MICE Muon Beam Authors: D. Adams, A. Alekou, M. Apollonio, R. Asfandiyarov, G. Barber, P. Barclay, A. de Bari, R. Bayes, V. Bayliss, P. Bene, R. Bertoni, V.J. Blackmore, A. Blondel, S. Blot, M. Bogomilov, M. Bonesini, C.N. Booth, D. Bowring, S. Boyd, T.W. Brashaw, U. Bravar, A.D. Bross, F. Cadoux, M. Capponi, T. Carlisle, G. Cecchet, C. Charnley, F. Chignoli, D. Cline, J.H. Cobb, G. Colling, N. Collomb, L. Coney, P. Cooke, M. Courthold, L.M. Cremaldi, S. Debieux, A. DeMello, A. Dick, A. Dobbs, P. Dornan, F. Drielsma, F. Filthaut, T. Fitzpatrick, P. Franchini, V. Francis, B. Freemire, L. Fry, A. Gallagher, R. Gamet, R. Gardener, S. Gourlay, A. Grant, J.S. Graulich, J. Greis, S. Griffiths, P. Hanlet, O.M. Hansen, G.G. Hanson, T.L. Hart, T. Hartnett, T. Hayler, C. Heidt, M. Hills, P. Hodgson, C. Hunt, C. Husi, A. Iaciofano, S. Ishimoto, G. Kafka, D.M. Kaplan, Y. Karadzhov, Y.K. Kim, Y. Kuno, P. Kyberd, J-B Lagrange, J. Langlands, W. Lau, M. Leonova, D. Li, A. Lintern, M. Littlefield, K. Long, T. Luo, C. Macwaters, B. Martlew, J. Martyniak, F. Masciocchi, R. Mazza, S. Middleton, A. Moretti, A. Moss, A. Muir, I. Mullacrane, J.J. Nebrensky, D. Neuffer, A. Nichols, R. Nicholson, L. Nicola, E. Noah Messomo, J.C. Nugent, A. Oates, Y. Onel, D. Orestano, E. Overton, P. Owens, V. Palladino, J. Pasternak, F. Pastore, C. Pidcott, M. Popovic, R. Preece, S. Prestemon, D. Rajaram, S. Ramberger, M.A. Rayner, S. Ricciardi, T.J. Roberts, M. Robinson, C. Rogers, K. Ronald, K. Rothenfusser, P. Rubinov, P. Rucinski, H. Sakamato, D.A. Sanders, R. Sandstrom, E. Santos, T. Savidge, P.J. Smith, P. Snopok, F.J.P. Soler, D. Speirs, T. Stanley, G. Stokes, D.J. Summers, J. Tarrant, I. Taylor, L. Tortora, Y. Torun, R. Tsenov, C.D. Tunnell, M.A. Uchida, G. Vankova-Kirilova, S. Virostek, M. Vretenar, P. Warburton, S. Watson, C. White, C.G. Whyte, A. Wilson, H. Wisting, X. Yang, A. Young, M. Zisman Categories: physics.ins-det hep-ex \\ The Muon Ionization Cooling Experiment (MICE) will perform a detailed study of ionization cooling to evaluate the feasibility of the technique. To carry out this program, MICE requires an efficient particle-identification (PID) system to identify muons. The Electron-Muon Ranger (EMR) is a fully-active tracking-calorimeter that forms part of the PID system and tags muons that traverse the cooling channel without decaying. The detector is capable of identifying electrons with an efficiency of 98.6%, providing a purity for the MICE beam that exceeds 99.8%. The EMR also proved to be a powerful tool for the reconstruction of muon momenta in the range 100-280 MeV/$c$. \\ ( http://arxiv.org/abs/1510.08306 , 2915kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08315 (*cross-listing*) Date: Wed, 28 Oct 2015 14:13:04 GMT (36kb,D) Title: Measurement of an excess in the yield of J/$\psi$ at very low-$p_{\rm T}$ in Pb--Pb collisions with the ALICE detector Authors: Laure Massacrier, for the ALICE Collaboration Categories: nucl-ex hep-ex Comments: Proceeding of EDS Blois Conference, 29th June - 4th July 2015, Borgo, Corsica \\ We report on the measurement of J/$\psi$ production at very low transverse momentum ($p_{\rm T} < $ 300 MeV/$c$) in Pb--Pb collisions performed with the ALICE detector at the LHC. We find an excess in the yield of J/$\psi$ with respect to expectations from hadronic production. Coherent photo-production of J/$\psi$ is proposed as a plausible origin of this excess. We show the nuclear modification factor of very low-$p_{\rm T}$ J/$\psi$ as a function of centrality. Then we measure the J/$\psi$ coherent photoproduction cross section in peripheral events assuming that it is the mechanism at the origin of the measured excess. It's worth noting that the observation of J/$\psi$ coherent photoproduction in Pb--Pb collisions at impact parameters smaller than twice the nuclear radius has never been observed so far and would open new theoretical challenges. \\ ( http://arxiv.org/abs/1510.08315 , 36kb) ------------------------------------------------------------------------------ \\ arXiv:1510.08421 (*cross-listing*) Date: Wed, 28 Oct 2015 19:16:28 GMT (181kb) Title: The impact of the intrinsic charm quark content of the proton on differential $\gamma+c$ cross section Authors: S. Rostami, A. Khorramian, A. Aleedaneshvar, M. Goharipour Categories: hep-ph hep-ex Comments: 16 pages, 8 figures \\ We present a comparative analysis of the impact of the non-perturbative intrinsic charm quark content of the proton on differential cross section of $\gamma +c $-jet in $ pp $ and $ p\bar{p} $ collisions, for the kinematic regions that are sensitive to this contribution. We discuss the $ Q^2 $ evolution of intrinsic quark distributions and present a code which provide these distributions as a function of $ x $ and $ Q^2 $ for any arbitrary Fock state probability. For the $ p\bar{p} $ collisions at the Tevatron, the results are compared with the recent experimental data of D0 at $\sqrt{s} =1.96$ TeV and also predictions for $ pp $ collisions at $\sqrt{s} =8$ TeV and $\sqrt{s} =13$ TeV for the LHC. \\ ( http://arxiv.org/abs/1510.08421 , 181kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1509.00371 (*cross-listing*) replaced with revised version Wed, 28 Oct 2015 09:21:31 GMT (528kb,D) Title: Directional Resolution of Dish Antenna Experiments to Search for WISPy Dark Matter Authors: Joerg Jaeckel and Stefan Knirck Categories: hep-ph hep-ex Comments: 13 pages, 6 figures; v2 updated references \\ ( http://arxiv.org/abs/1509.00371 , 528kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/