Search for the Standard Model Higgs boson produced in association with a vector boson and decaying to a b-quark pair with the ATLAS detector

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 718:2 (2012) 369-390

Authors:

G Aad, B Abbott, J Abdallah, S Abdel Khalek, AA Abdelalim, O Abdinov, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, E Acerbi, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Agustoni, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA A kesson, G Akimoto, AV Akimov, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, BMM Allbrooke, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, B Alvarez Gonzalez, MG Alviggi, K Amako, C Amelung, VV Ammosov, A Amorim, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, P Anger, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena

Abstract:

This Letter presents the results of a direct search with the ATLAS detector at the LHC for a Standard Model Higgs boson of mass 110≤m H ≤130GeV produced in association with a W or Z boson and decaying to bb'. Three decay channels are considered: ZH→ℓ+ℓ-bb', WH→ℓνbb' and ZH→νν'bb', where ℓ corresponds to an electron or a muon. No evidence for Higgs boson production is observed in a dataset of 7TeV pp collisions corresponding to 4.7fb -1 of integrated luminosity collected by ATLAS in 2011. Exclusion limits on Higgs boson production, at the 95% confidence level, of 2.5 to 5.5 times the Standard Model cross section are obtained in the mass range 110-130GeV. The expected exclusion limits range between 2.5 and 4.9 for the same mass interval. © 2012 CERN.

Search for doubly charged Higgs bosons in like-sign dilepton final states at √s = 7 TeV with the ATLAS detector

European Physical Journal C 72:12 (2012)

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, SA Khalek, AA Abdelalim, O Abdinov, R Aben, B Abi, M Abolins, OSA Zeid, H Abramowicz, H Abreu, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Agustoni, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, TPA Åkesson, G Akimoto, AV Akimov, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, BMM Allbrooke, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, A Altheimer, BA Gonzalez, MG Alviggi, K Amako, C Amelung, VV Ammosov, SPA Dos Santos, A Amorim, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, S Angelidakis, P Anger, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, M Aoki, S Aoun, LA Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, JF Arguin, S Argyropoulos, E Arik

Abstract:

A search for doubly charged Higgs bosons decaying to pairs of electrons and/or muons is presented. The search is performed using a data sample corresponding to an integrated luminosity of 4.7 fb−1of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Pairs of prompt, isolated, high-pT leptons with the same electric charge (e±e±, e±μ±, μ±μ±) are selected, and their invariant mass distribution is searched for a narrow resonance. No significant excess over Standard Model background expectations is observed, and limits are placed on the cross section times branching ratio for pair production of doubly charged Higgs bosons. The masses of doubly charged Higgs bosons are constrained depending on the branching ratio into these leptonic final states. Assuming pair production, coupling to left-handed fermions, and a branching ratio of 100% for each final state, masses below 409 GeV, 375 GeV, and 398 GeV are excluded for e±e±, e±μ±, and μ±μ±, respectively.

Search for anomalous production of prompt like-sign lepton pairs at root s=7 TeV with the ATLAS detector

JOURNAL OF HIGH ENERGY PHYSICS (2012) ARTN 007

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, SA Khalek, AA Abdelalim, O Abdinov, R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, E Acerbi, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Agustoni, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Akesson, G Akimoto, AV Akimov, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, BMM Allbrooke, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, B Alvarez Gonzalez, MG Alviggi, K Amako, C Amelung, VV Ammosov, SPA Dos Santos, A Amorim, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, M-L Andrieux, XS Anduaga, P Anger, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, M Aoki, S Aoun, LA Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, J-F Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, V Arnal, C Arnault, A Artamonov, G Artoni, D Arutinov, S Asai, R Asfandiyarov, S Ask, B Asman, L Asquith, K Assamagan, A Astbury, M Atkinson, B Aubert, E Auge, K Augsten, M Aurousseau, G Avolio, R Avramidou, D Axen, G Azuelos, Y Azuma, MA Baak, G Baccaglioni, C Bacci, AM Bach, H Bachacou, K Bachas, M Backes, M Backhaus, E Badescu, P Bagnaia, S Bahinipati, Y Bai, DC Bailey, T Bain, JT Baines, OK Baker, MD Baker, S Baker, E Banas, P Banerjee, S Banerjee, D Banfi, A Bangert, V Bansal, HS Bansil, L Barak, SP Baranov, AB Galtieri, T Barber, EL Barberio, D Barberis, M Barbero, DY Bardin, T Barillari, M Barisonzi, T Barklow, N Barlow, BM Barnett, RM Barnett, A Baroncelli, G Barone, AJ Barr, F Barreiro, JBG da Costa, P Barrillon, R Bartoldus, AE Barton, V Bartsch, A Basye, RL Bates, L Batkova, JR Batley, A Battaglia, M Battistin, F Bauer, HS Bawa, S Beale, T Beau, PH Beauchemin, R Beccherle, P Bechtle, HP Beck, AK Becker, S Becker, M Beckingham, KH Becks, AJ Beddall, A Beddall, S Bedikian, VA Bednyakov, CP Bee, LJ Beemster, M Begel, SB Harpaz, PK Behera, M Beimforde, C Belanger-Champagne, PJ Bell, WH Bell, G Bella, L Bellagamba, F Bellina, M Bellomo, A Belloni, O Beloborodova, K Belotskiy, O Beltramello, O Benary, D Benchekroun, K Bendtz, N Benekos, Y Benhammou, EB Noccioli, JA Benitez Garcia, DP Benjamin, M Benoit, JR Bensinger, K Benslama, S Bentvelsen, D Berge, EB Kuutmann, N Berger, F Berghaus, E Berglund, J Beringer, P Bernat, R Bernhard, C Bernius, T Berry, C Bertella, A Bertin, F Bertolucci, MI Besana, GJ Besjes, N Besson, S Bethke, W Bhimji, RM Bianchi, M Bianco, O Biebel, SP Bieniek, K Bierwagen, J Biesiada, M Biglietti, H Bilokon, M Bindi, S Binet, A Bingul, C Bini, C Biscarat, B Bittner, KM Black, RE Blair, J-B Blanchard, G Blanchot, T Blazek, I Bloch, C Blocker, J Blocki, A Blondel, W Blum, U Blumenschein, GJ Bobbink, VB Bobrovnikov, SS Bocchetta, A Bocci, CR Boddy, M Boehler, J Boek, N Boelaert, JA Bogaerts, A Bogdanchikov, A Bogouch, C Bohm, J Bohm, V Boisvert, T Bold, V Boldea, NM Bolnet, M Bomben, M Bona, M Boonekamp, CN Booth, S Bordoni, C Borer, A Borisov, G Borissov, I Borjanovic, M Borri, S Borroni, V Bortolotto, K Bos, D Boscherini, M Bosman, H Boterenbrood, J Bouchami, J Boudreau, EV Bouhova-Thacker, D Boumediene, C Bourdarios, N Bousson, A Boveia, J Boyd, IR Boyko, I Bozovic-Jelisavcic, J Bracinik, P Branchini, GW Brandenburg, A Brandt, G Brandt, O Brandt, U Bratzler, B Brau, JE Brau, HM Braun, SF Brazzale, B Brelier, J Bremer, K Brendlinger, R Brenner, S Bressler, D Britton, FM Brochu, I Brock, R Brock, F Broggi, C Bromberg, J Bronner, G Brooijmans, T Brooks, WK Brooks, G Brown, H Brown, PAB de Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni, G Bruni, M Bruschi, T Buanes, Q Buat, F Bucci, J Buchanan, P Buchholz, RM Buckingham, AG Buckley, SI Buda, IA Budagov, B Budick, VB Uscher, L Bugge, O Bulekov, AC Bundock, M Bunse, T Buran, H Burckhart, S Burdin, T Burgess, S Burke, E Busato, P Bussey, CP Buszello, B Butler, JM Butler, CM Buttar, JM Butterworth, W Buttinger, SC Urban, D Caforio, O Cakir, P Calafiura, G Calderini, P Calfayan, R Calkins, LP Caloba, R Caloi, D Calvet, S Calvet, RC Toro, P Camarri, D Cameron, LM Caminada, RC Armadans, S Campana, M Campanelli, V Canale, F Canelli, A Canepa, J Cantero, R Cantrill, L Capasso, MDMC Garrido, I Caprini, M Caprini, D Capriotti, M Capua, R Caputo, R Cardarelli, T Carli, G Carlino, L Carminati, B Caron, S Caron, E Carquin, GD Carrillo-Montoya, AA Carter, JR Carter, J Carvalho, D Casadei, MP Casado, M Cascella, C Caso, AM Castaneda Hernandez, E Castaneda-Miranda, V Castillo Gimenez, NF Castro, G Cataldi, P Catastini, A Catinaccio, JR Catmore, A Cattai, G Cattani, S Caughron, V Cavaliere, P Cavalleri, D Cavalli, M Cavalli-Sforza, V Cavasinni, F Ceradini, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, SA Cetin, A Chafaq, D Chakraborty, I Chalupkova, K Chan, P Chang, B Chapleau, JD Chapman, JW Chapman, E Chareyre, DG Charlton, V Chavda, CAC Barajas, S Cheatham, S Chekanov, SV Chekulaev, GA Chelkov, MA Chelstowska, C Chen, H Chen, S Chen, X Chen, Y Chen, A Cheplakov, R Cherkaoui, E Moursli, V Chernyatin, E Cheu, SL Cheung, L Chevalier, G Chiefari, L Chikovani, JT Childers, A Chilingarov, G Chiodini, AS Chisholm, RT Chislett, A Chitan, MV Chizhov, G Choudalakis, S Chouridou, IA Christidi, A Christov, D Chromek-Burckhart, ML Chu, J Chudoba, G Ciapetti, AK Ciftci, R Ciftci, D Cinca, V Cindro, C Ciocca, A Ciocio, M Cirilli, P Cirkovic, ZH Citron, M Citterio, M Ciubancan, A Clark, PJ Clark, RN Clarke, W Cleland, JC Clemens, B Clement, C Clement, Y Coadou, M Cobal, A Coccaro, J Cochran, JG Cogan, J Coggeshall, E Cogneras, J Colas, S Cole, AP Colijn, NJ Collins, C Collins-Tooth, J Collot, T Colombo, G Colon, PC Muino, E Coniavitis, MC Conidi, SM Consonni, V Consorti, S Constantinescu, C Conta, G Conti, F Conventi, M Cooke, BD Cooper, AM Cooper-Sarkar, K Copic, T Cornelissen, M Corradi, F Corriveau, A Cortes-Gonzalez, G Cortiana, G Costa, MJ Costa, D Costanzo, D Cote, L Courneyea, G Cowan, C Cowden, BE Cox, K Cranmer, F Crescioli, M Cristinziani, G Crosetti, S Crepe-Renaudin, C-M Cuciuc, CC Almenar, TC Donszelmann, M Curatolo, CJ Curtis, C Cuthbert, P Cwetanski, H Czirr, P Czodrowski, Z Czyczula, S D'Auria, M D'Onofrio, A D'Orazio, MJDCS De Sousa, C Da Via, W Dabrowski, A Dafinca, T Dai, C Dallapiccola, M Dam, M Dameri, DS Damiani, HO Danielsson, V Dao, G Darbo, GL Darlea, JA Dassoulas, W Davey, T Davidek, N Davidson, R Davidson, E Davies, M Davies, O Davignon, AR Davison, Y Davygora, E Dawe, I Dawson, RK Daya-Ishmukhametova, K De, R de Asmundis, S De Castro, S De Cecco, J de Graat, N De Groot, P de Jong, C De La Taille, H De la Torre, F De Lorenzi, L de Mora, L De Nooij, D De Pedis, A De Salvo, U De Sanctis, A De Santo, JBDV De Regie, G De Zorzi, WJ Dearnaley, R Debbe, C Debenedetti, B Dechenaux, DV Dedovich, J Degenhardt, C Del Papa, J Del Peso, T Del Prete, T Delemontex, M Deliyergiyev, A Dell'Acqua, L Dell'Asta, M Della Pietra, D della Volpe, M Delmastro, PA Delsart, C Deluca, S Demers, M Demichev, B Demirkoz, J Deng, SP Denisov, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, E Devetak, PO Deviveiros, A Dewhurst, B DeWilde, S Dhaliwal, R Dhullipudi, A Di Ciaccio, L Di Ciaccio, A Di Girolamo, B Di Girolamo, S Di Luise, A Di Mattia, B Di Micco, R Di Nardo, A Di Simone, R Di Sipio, MA Diaz, EB Diehl, J Dietrich, TA Dietzsch, S Diglio, KD Yagci, J Dingfelder, F Dinut, C Dionisi, P Dita, S Dita, F Dittus, F Djama, T Djobava, MAB do Vale, ADV Wemans, TKO Doan, M Dobbs, R Dobinson, D Dobos, E Dobson, J Dodd, C Doglioni, T Doherty, Y Doi, J Dolejsi, I Dolenc, Z Dolezal, BA Dolgoshein, T Dohmae, M Donadelli, J Donini, J Dopke, A Doria, A Dos Anjos, A Dotti, MT Dova, AD Doxiadis, AT Doyle, N Dressnandt, M Dris, J Dubbert, S Dube, E Duchovni, G Duckeck, D Duda, A Dudarev, F Dudziak, M Duehrssen, IP Duerdoth, L Duflot, M-A Dufour, L Duguid, M Dunford, HD Yildiz, R Duxfield, M Dwuznik, F Dydak, M Dueren, WL Ebenstein, J Ebke, S Eckweiler, K Edmonds, W Edson, CA Edwards, NC Edwards, W Ehrenfeld, T Eifert, G Eigen, K Einsweiler, E Eisenhandler, T Ekelof, M El Kacimi, M Ellert, S Elles, F Ellinghaus, K Ellis, N Ellis, J Elmsheuser, M Elsing, D Emeliyanov, R Engelmann, A Engl, B Epp, J Erdmann, A Ereditato, D Eriksson, J Ernst, M Ernst, J Ernwein, D Errede, S Errede, E Ertel, M Escalier, H Esch, C Escobar, XE Curull, B Esposito, F Etienne, AI Etienvre, E Etzion, D Evangelakou, H Evans, L Fabbri, C Fabre, RM Fakhrutdinov, S Falciano, Y Fang, M Fanti, A Farbin, A Farilla, J Farley, T Farooque, S Farrell, SM Farrington, P Farthouat, F Fassi, P Fassnacht, D Fassouliotis, B Fatholahzadeh, A Favareto, L Fayard, S Fazio, R Febbraro, P Federic, OL Fedin, W Fedorko, M Fehling-Kaschek, L Feligioni, D Fellmann, C Feng, EJ Feng, AB Fenyuk, J Ferencei, W Fernando, S Ferrag, J Ferrando, V Ferrara, A Ferrari, P Ferrari, R Ferrari, DEF de Lima, A Ferrer, D Ferrere, C Ferretti, AF Parodi, M Fiascaris, F Fiedler, A Filipcic, F Filthaut, M Fincke-Keeler, MCN Fiolhais, L Fiorini, A Firan, G Fischer, MJ Fisher, M Flechl, I Fleck, J Fleckner, P Fleischmann, S Fleischmann, T Flick, A Floderus, LRF Castillo, MJ Flowerdew, TF Martin, A Formica, A Forti, D Fortin, D Fournier, AJ Fowler, H Fox, P Francavilla, M Franchini, S Franchino, D Francis, T Frank, S Franz, M Fraternali, S Fratina, ST French, C Friedrich, F Friedrich, R Froeschl, D Froidevaux, JA Frost, C Fukunaga, EF Torregrosa, BG Fulsom, J Fuster, C Gabaldon, O Gabizon, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, B Galhardo, EJ Gallas, V Gallo, BJ Gallop, P Gallus, KK Gan, YS Gao, A Gaponenko, F Garberson, M Garcia-Sciveres, C Garcia, JEG Navarro, RW Gardner, N Garelli, H Garitaonandia, V Garonne, C Gatti, G Gaudio, B Gaur, L Gauthier, P Gauzzi, IL Gavrilenko, C Gay, G Gaycken, EN Gazis, P Ge, Z Gecse, CNP Gee, DAA Geerts, C Geich-Gimbel, K Gellerstedt, C Gemme, A Gemmell, MH Genest, S Gentile, M George, S George, P Gerlach, A Gershon, C Geweniger, H Ghazlane, N Ghodbane, B Giacobbe, S Giagu, V Giakoumopoulou, V Giangiobbe, F Gianotti, B Gibbard, A Gibson, SM Gibson, M Gilchriese, D Gillberg, AR Gillman, DM Gingrich, J Ginzburg, N Giokaris, MP Giordani, R Giordano, FM Giorgi, P Giovannini, PF Giraud, D Giugni, M Giunta, P Giusti, BK Gjelsten, LK Gladilin, C Glasman, J Glatzer, A Glazov, KW Glitza, GL Glonti, JR Goddard, J Godfrey, J Godlewski, M Goebel, T Goepfert, C Goeringer, C Goessling, S Goldfarb, T Golling, A Gomes, LS Gomez Fajardo, R Goncalo, J Goncalves Pinto Firmino Da Costa, L Gonella, S Gonzalez, S Gonzalez de la Hoz, G Gonzalez Parra, ML Gonzalez Silva, S Gonzalez-Sevilla, JJ Goodson, L Goossens, PA Gorbounov, HA Gordon, I Gorelov, G Gorfine, B Gorini, E Gorini, A Gorisek, E Gornicki, B Gosdzik, AT Goshaw, M Gosselink, MI Gostkin, IG Eschrich, M Gouighri, D Goujdami, MP Goulette, AG Goussiou, C Goy, S Gozpinar, I Grabowska-Bold, P Grafstrom, K-J Grahn, F Grancagnolo, S Grancagnolo, V Grassi, V Gratchev, N Grau, HM Gray, JA Gray, E Graziani, OG Grebenyuk, T Greenshaw, ZD Greenwood, K Gregersen, IM Gregor, P Grenier, J Griffiths, N Grigalashvili, AA Grillo, S Grinstein, P Gris, YV Grishkevich, J-F Grivaz, E Gross, J Grosse-Knetter, J Groth-Jensen, K Grybel, D Guest, C Guicheney, S Guindon, U Gul, H Guler, J Gunther, B Guo, J Guo, P Gutierrez, N Guttman, O Gutzwiller, C Guyot, C Gwenlan, CB Gwilliam, A Haas, S Haas, C Haber, HK Hadavand, DR Hadley, P Haefner, F Hahn, S Haider, Z Hajduk, H Hakobyan, D Hall, J Haller, K Hamacher, P Hamal, K Hamano, M Hamer, A Hamilton, S Hamilton, L Han, K Hanagaki, K Hanawa, M Hance, C Handel, P Hanke, JR Hansen, JB Hansen, JD Hansen, PH Hansen, P Hansson, K Hara, GA Hare, T Harenberg, S Harkusha, D Harper, RD Harrington, OM Harris, J Hartert, F Hartjes, T Haruyama, A Harvey, S Hasegawa, Y Hasegawa, S Hassani, S Haug, M Hauschild, R Hauser, M Havranek, CM Hawkes, RJ Hawkings, AD Hawkins, D Hawkins, T Hayakawa, T Hayashi, D Hayden, CP Hays, HS Hayward, SJ Haywood, M He, SJ Head, V Hedberg, L Heelan, S Heim, B Heinemann, S Heisterkamp, L Helary, C Heller, M Heller, S Hellman, D Hellmich, C Helsens, RCW Henderson, M Henke, A Henrichs, AMH Correia, S Henrot-Versille, C Hensel, T Henss, CM Hernandez, Y Hernandez Jimenez, R Herrberg, G Herten, R Hertenberger, L Hervas, GG Hesketh, NP Hessey, E Higon-Rodriguez, JC Hill, KH Hiller, S Hillert, SJ Hillier, I Hinchliffe, E Hines, M Hirose, F Hirsch, D Hirschbuehl, J Hobbs, N Hod, MC Hodgkinson, P Hodgson, A Hoecker, MR Hoeferkamp, J Hoffman, D Hoffmann, M Hohlfeld, M Holder, SO Holmgren, T Holy, JL Holzbauer, TM Hong, LH van Huysduynen, S Horner, J-Y Hostachy, S Hou, A Hoummada, J Howard, J Howarth, I Hristova, J Hrivnac, T Hryn'ova, PJ Hsu, S-C Hsu, D Hu, Z Hubacek, F Hubaut, F Huegging, A Huettmann, TB Huffman, EW Hughes, G Hughes, M Huhtinen, M Hurwitz, U Husemann, N Huseynov, J Huston, J Huth, G Iacobucci, G Iakovidis, M Ibbotson, I Ibragimov, L Iconomidou-Fayard, J Idarraga, P Iengo, O Igonkina, Y Ikegami, M Ikeno, D Iliadis, N Ilic, T Ince, J Inigo-Golfin, P Ioannou, M Iodice, K Iordanidou, V Ippolito, AI Quiles, C Isaksson, M Ishino, M Ishitsuka, R Ishmukhametov, C Issever, S Istin, AV Ivashin, W Iwanski, H Iwasaki, JM Izen, V Izzo, B Jackson, JN Jackson, P Jackson, MR Jaekel, V Jain, K Jakobs, S Jakobsen, T Jakoubek, J Jakubek, DK Jana, E Jansen, H Jansen, A Jantsch, M Janus, G Jarlskog, L Jeanty, IJ-L Plante, D Jennens, P Jenni, AE Loevschall-Jensen, P Jez, S Jezequel, MK Jha, H Ji, W Ji, J Jia, Y Jiang, MJ Belenguer, S Jin, O Jinnouchi, MD Joergensen, D Joffe, M Johansen, KE Johansson, P Johansson, S Johnert, KA Johns, K Jon-And, G Jones, RWL Jones, TJ Jones, C Joram, PM Jorge, KD Joshi, J Jovicevic, T Jovin, X Ju, CA Jung, RM Jungst, V Juranek, P Jussel, AJ Rozas, S Kabana, M Kaci, A Kaczmarska, 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Zutshi, L Zwalinski, A Collaboration

15x optical zoom and extreme optical image stabilisation: Diffraction limited integral field spectroscopy with the SWIFT spectrograph

Proceedings of SPIE - The International Society for Optical Engineering 8446 (2012)

Authors:

M Tecza, N Thatte, F Clarke, J Lynn, D Freeman, J Roberts, R Dekany

Abstract:

When commissioned in November 2008 at the Palomar 200 inch Hale Telescope, the Oxford SWIFT I&z band integral field spectrograph, fed by the adaptive optics system PALAO, provided a wide (3x) range of spatial resolutions: three plate scales of 235 mas, 160 mas, and 80 mas per spaxel over a contiguous field-of-view of 89x44 pixels. Depending on observing conditions and guide star brightness we can choose a seeing limited scale of 235 mas per spaxel, or 160 mas and 80 mas per spaxel for very bright guide star AO with substantial increase of enclosed energy. Over the last two years PALAO was upgraded to PALM-3000: an extreme, high-order adaptive optics system with two deformable mirrors with more than 3000 actuators, promising diffraction limited performance in SWIFT's wavelength range. In order to take advantage of this increased spatial resolution we upgraded SWIFT with new pre-optics allowing us to spatially Nyquist sample the diffraction limited PALM-3000 point spread function with 16 mas resolution, reducing the spaxel scale by another factor of 5x. We designed, manufactured, integrated and tested the new pre-optics in the first half of 2011 and commissioned it in December 2011. Here we present the opto-mechanical design and assembly of the new scale changing optics, as well as laboratory and on-sky commissioning results. In optimal observing conditions we achieve substantial Strehl ratios, delivering the near diffraction limited spatial resolution in the I&z bands. © 2012 SPIE.

Development of the single fibres and IFUs of WEAVE

Proceedings of SPIE - The International Society for Optical Engineering 8450 (2012)

Authors:

I Guinouard, P Bonifacio, SC Trager, MAW Verheijen, I Lewis, G Dalton

Abstract:

WEAVE is a new wide-field spectroscopy facility proposed for the prime focus of the 4.2m William Herschel telescope. The facility comprises a new 2 degree field of view prime focus corrector with a 1000-multiplex fibre positioner, a small number of individually deployable IFUs, and a large single IFU. The IFUs and the MOS fibres can be used to feed a dual-beam spectrograph that will provide full coverage of the majority of the visible spectrum in a single exposure at a resolution ∼5000 or two 50nm-wide regions at a resolution of ∼20000. This paper sums up the design of these two modes and describes the specific developments required to optimise the performances of the fibre system. © 2012 SPIE.