Author: "B. C. Allanach" - Searchworks@Jio Institute Digital Library Search Results

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62 results on '"B. C. Allanach"'

1. Hide and seek with the third family hypercharge model’s $$Z^\prime $$ Z ′ at the large hadron collider

Author: B. C. Allanach and Hannah Banks
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The Third Family Hypercharge Model predicts a $$Z^\prime $$ Z ′ gauge boson with flavour dependent couplings which has been used to explain anomalies in meson decay processes which involve the $$b\rightarrow s\mu ^+\mu ^-$$ b → s μ + μ - transition. The model predicts that a TeV-scale $$Z^\prime $$ Z ′ should decay to particle-antiparticle pairs of muons, taus, top quarks and bottom quarks with appreciable branching ratios. We reinterpret various ATLAS and CMS search limits for $$Z^\prime $$ Z ′ production followed by such decays at the LHC over a parameter space of the model that results from a successful combined fit to the $$b\rightarrow s l^+ l^-$$ b → s l + l - data and precision electroweak observables. Current exclusions in parameter space and expected sensitivities of the various different channels in the high-luminosity run are compared. We find that the high-luminosity run of the LHC will significantly increase the sensitivity to the model beyond the existing empirical limits, which we find to be surprisingly weak.
Published: 2022
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2. A ν supersymmetric anomaly-free atlas

Author: B. C. Allanach, Maeve Madigan, and Joseph Tooby-Smith
Subjects: Supersymmetry Phenomenology, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Extensions of the minimal supersymmetric standard model (MSSM) gauge group abound in the literature. Several of these include an additional U(1) X gauge group. Chiral fermions’ charge assignments under U(1) X are constrained to cancel local anomalies in the extension and they determine the structure and phenomenology of it. We provide all anomaly-free charge assignments up to a maximum absolute charge of Q max = 10, assuming that the chiral superfield content of the model is that of the MSSM plus up to three Standard Model (SM) singlet superfields. The fermionic components of these SM singlets may play the rôle of right-handed neutrinos, whereas one of the scalar components may play the rôle of the flavon, spontaneously breaking U(1) X . Easily scanned lists of the charge assignments are made publicly available on Zenodo. For the case where no restriction is placed upon Q max, we also provide an analytic parameterisation of the general solution using simple techniques from algebraic geometry.
Published: 2022
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3. Large hadron collider constraints on some simple $$Z^\prime $$ Z ′ models for $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - anomalies

Author: B. C. Allanach, J. M. Butterworth, and Tyler Corbett
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We examine current Large Hadron Collider constraints on some simple $$Z^\prime $$ Z ′ models that significantly improve on Standard Model fits to $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - transition data. The models that we consider are the ‘third family baryon number minus second family lepton number’ ( $${B_3-L_2}$$ B 3 - L 2 ) model and the ‘third family hypercharge’ model and variants. The constraints are applied on parameter regions of each model that fit the $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - transition data and come from high-mass Drell–Yan di-muons and measurements of Standard Model processes. This latter set of observables place particularly strong bounds upon the parameter space of the $${B_3-L_2}$$ B 3 - L 2 model when the mass of the $$Z^\prime $$ Z ′ boson is less than 300 GeV.
Published: 2021
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4. Global fits of third family hypercharge models to neutral current B-anomalies and electroweak precision observables

Author: B. C. Allanach, J. Eliel Camargo-Molina, and Joe Davighi
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract While it is known that third family hypercharge models can explain the neutral current B-anomalies, it was hitherto unclear whether the $$Z-Z^\prime $$ Z - Z ′ mixing predicted by such models could simultaneously fit electroweak precision observables. Here, we perform global fits of several third family hypercharge models to a combination of electroweak data and those data pertinent to the neutral current B-anomalies. While the Standard Model is in tension with this combined data set with a p-value of .0007, simple versions of the models (fitting two additional parameters each) provide much improved fits. The original Third Family Hypercharge Model, for example, has a p-value of $${.065}$$ . 065 , with $$\sqrt{\Delta \chi ^2}=6.5\sigma $$ Δ χ 2 = 6.5 σ .
Published: 2021
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5. Higgs-mass predictions in the MSSM and beyond

Author: P. Slavich, S. Heinemeyer, E. Bagnaschi, H. Bahl, M. Goodsell, H. E. Haber, T. Hahn, R. Harlander, W. Hollik, G. Lee, M. Mühlleitner, S. Paßehr, H. Rzehak, D. Stöckinger, A. Voigt, C. E. M. Wagner, G. Weiglein, B. C. Allanach, T. Biekötter, S. Borowka, J. Braathen, M. Carena, T. N. Dao, G. Degrassi, F. Domingo, P. Drechsel, U. Ellwanger, M. Gabelmann, R. Gröber, J. Klappert, T. Kwasnitza, D. Meuser, L. Mihaila, N. Murphy, K. Nickel, W. Porod, E. A. Reyes Rojas, I. Sobolev, and F. Staub
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise measurement of its mass at the LHC have spurred new efforts aimed at improving the accuracy of the theoretical predictions for the Higgs masses in supersymmetric models. The “Precision SUSY Higgs Mass Calculation Initiative” (KUTS) was launched in 2014 to provide a forum for discussions between the different groups involved in these efforts. This report aims to present a comprehensive overview of the current status of Higgs-mass calculations in supersymmetric models, to document the many advances that were achieved in recent years and were discussed during the KUTS meetings, and to outline the prospects for future improvements in these calculations.
Published: 2021
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6. $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 explanation of the neutral current $$B-$$ B - anomalies

Author: B. C. Allanach
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We investigate a speculative short-distance force, proposed to explain discrepancies observed between measurements of certain neutral current decays of B hadrons and their Standard Model predictions. The force derives from a spontaneously broken, gauged $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 extension to the Standard Model, where the extra quantum numbers of Standard Model fields are given by third family baryon number minus second family lepton number. The only fields beyond those of the Standard Model are three right-handed neutrinos, a gauge field associated with $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 and a Standard Model singlet complex scalar which breaks $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 , a ‘flavon’. This simple model, via interactions involving a TeV scale force-carrying $$Z^\prime $$ Z ′ vector boson, can successfully explain the neutral current $$B-$$ B - anomalies whilst accommodating other empirical constraints. In an ansatz for fermion mixing, a combination of up-to-date $$B-$$ B - anomaly fits, LHC direct $$Z^\prime $$ Z ′ search limits and other bounds rule out the domain 0.15 $$\hbox {TeV}< M_{Z^\prime }
Published: 2021
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7. Sensitivity of future hadron colliders to leptoquark pair production in the di-muon di-jets channel

Author: B. C. Allanach, Tyler Corbett, and Maeve Madigan
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We estimate the future sensitivity of the high luminosity (HL-) and high energy (HE-) modes of the Large Hadron Collider (LHC) and of a 100 TeV future circular collider (FCC-hh) to leptoquark (LQ) pair production in the muon-plus-jet decay mode of each LQ. Such LQs are motivated by the fact that they provide an explanation for the neutral current B-anomalies. For each future collider, Standard Model (SM) backgrounds and detector effects are simulated. From these, sensitivities of each collider are found. Our measures of sensitivity are based upon a Run II ATLAS search, which we also use for validation. We illustrate with a narrow scalar (‘$$S_3$$ S3 ’) LQ and find that, in our channel, the HL-LHC has exclusion sensitivity to LQ masses up to 1.8 TeV, the HE-LHC up to 4.8 TeV and the FCC-hh up to 13.5 TeV.
Published: 2020
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8. Naturalising the third family hypercharge model for neutral current $$B{-}\hbox {anomalies}$$ B-anomalies

Author: B. C. Allanach and Joe Davighi
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We consider a deformation of the Third Family Hypercharge Model, which arguably makes the model more natural. Additional non-zero charges of the spontaneously broken, family-dependent $$U(1)_F$$ U(1)F gauge symmetry are assigned to the second family leptons, and the third family leptons’ charges are deformed away from their hypercharges in such a way that the $$U(1)_F$$ U(1)F gauge symmetry remains anomaly-free. Second family $$U(1)_F$$ U(1)F lepton charges allow a $$Z^\prime $$ Z′ coupling to muons without having to assume large charged lepton mixing, which risks violating tight lepton flavour violation bounds. In this deformed version, only the bottom and top Yukawa couplings are generated at the renormalisable level, whereas the tauon Yukawa coupling is absent. The $$Z^\prime $$ Z′ mediates a beyond the Standard Model contribution to an effective $$({\bar{b}} s) (\bar{\mu }\mu )$$ (b¯s)(μ¯μ) vertex in the combination $$C_9=-9C_{10}$$ C9=-9C10 and is able to fit the apparent discrepancy between Standard Model predictions in flavour changing neutral-current $$B-$$ B- meson decays and their measurements, whilst simultaneously avoiding current constraints from direct $$Z^\prime $$ Z′ searches and other measurements, when $$0.8~\text {TeV}< M_{Z^\prime } < 12.5 ~\text {TeV}$$ 0.8TeV
Published: 2019
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9. Collider constraints on Z′ models for neutral current B-anomalies

Author: B. C. Allanach, J. M. Butterworth, and Tyler Corbett
Subjects: Beyond Standard Model, Heavy Quark Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We examine current collider constraints on some simple Z ′ models that fit neutral current B-anomalies, including constraints coming from measurements of Standard Model (SM) signatures at the LHC. The ‘MDM’ simplified model is not constrained by the SM measurements but is strongly constrained by a 139 fb−1 13 TeV ATLAS di-muon search. Constraints upon the ‘MUM’ simplified model are much weaker. A combination of the current B s mixing constraint and ATLAS’ Z ′ search implies M Z ′ > 1.2 $$ {M}_{Z^{\prime }}>1.2 $$ TeV in the Third Family Hypercharge Model example case. LHC SM measurements rule out a portion of the parameter space of the model for M Z ′ > 1.5 $$ {M}_{Z^{\prime }}>1.5 $$ TeV.
Published: 2019
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10. FCC Physics Opportunities

Author: A. Abada, M. Abbrescia, S. S. AbdusSalam, I. Abdyukhanov, J. Abelleira Fernandez, A. Abramov, M. Aburaia, A. O. Acar, P. R. Adzic, P. Agrawal, J. A. Aguilar-Saavedra, J. J. Aguilera-Verdugo, M. Aiba, I. Aichinger, G. Aielli, A. Akay, A. Akhundov, H. Aksakal, J. L. Albacete, S. Albergo, A. Alekou, M. Aleksa, R. Aleksan, R. M. Alemany Fernandez, Y. Alexahin, R. G. Alía, S. Alioli, N. Alipour Tehrani, B. C. Allanach, P. P. Allport, M. Altınlı, W. Altmannshofer, G. Ambrosio, D. Amorim, O. Amstutz, L. Anderlini, A. Andreazza, M. Andreini, A. Andriatis, C. Andris, A. Andronic, M. Angelucci, F. Antinori, S. A. Antipov, M. Antonelli, M. Antonello, P. Antonioli, S. Antusch, F. Anulli, L. Apolinário, G. Apollinari, A. Apollonio, D. Appelö, R. B. Appleby, Ara. Apyan, Arm. Apyan, A. Arbey, A. Arbuzov, G. Arduini, V. Arı, S. Arias, N. Armesto, R. Arnaldi, S. A. Arsenyev, M. Arzeo, S. Asai, E. Aslanides, R. W. Aßmann, D. Astapovych, M. Atanasov, S. Atieh, D. Attié, B. Auchmann, A. Audurier, S. Aull, S. Aumon, S. Aune, F. Avino, G. Avrillaud, G. Aydın, A. Azatov, G. Azuelos, P. Azzi, O. Azzolini, P. Azzurri, N. Bacchetta, E. Bacchiocchi, H. Bachacou, Y. W. Baek, V. Baglin, Y. Bai, S. Baird, M. J. Baker, M. J. Baldwin, A. H. Ball, A. Ballarino, S. Banerjee, D. P. Barber, D. Barducci, P. Barjhoux, D. Barna, G. G. Barnaföldi, M. J. Barnes, A. Barr, J. Barranco García, J. Barreiro Guimarães da Costa, W. Bartmann, V. Baryshevsky, E. Barzi, S. A. Bass, A. Bastianin, B. Baudouy, F. Bauer, M. Bauer, T. Baumgartner, I. Bautista-Guzmán, C. Bayındır, F. Beaudette, F. Bedeschi, M. Béguin, I. Bellafont, L. Bellagamba, N. Bellegarde, E. Belli, E. Bellingeri, F. Bellini, G. Bellomo, S. Belomestnykh, G. Bencivenni, M. Benedikt, G. Bernardi, J. Bernardi, C. Bernet, J. M. Bernhardt, C. Bernini, C. Berriaud, A. Bertarelli, S. Bertolucci, M. I. Besana, M. Besançon, O. Beznosov, P. Bhat, C. Bhat, M. E. Biagini, J.-L. Biarrotte, A. Bibet Chevalier, E. R. Bielert, M. Biglietti, G. M. Bilei, B. Bilki, C. Biscari, F. Bishara, O. R. Blanco-García, F. R. Blánquez, F. Blekman, A. Blondel, J. Blümlein, T. Boccali, R. Boels, S. A. Bogacz, A. Bogomyagkov, O. Boine-Frankenheim, M. J. Boland, S. Bologna, O. Bolukbasi, M. Bomben, S. Bondarenko, M. Bonvini, E. Boos, B. Bordini, F. Bordry, G. Borghello, L. Borgonovi, S. Borowka, D. Bortoletto, D. Boscherini, M. Boscolo, S. Boselli, R. R. Bosley, F. Bossu, C. Botta, L. Bottura, R. Boughezal, D. Boutin, G. Bovone, I. Božović Jelisavc̆ić, A. Bozbey, C. Bozzi, D. Bozzini, V. Braccini, S. Braibant-Giacomelli, J. Bramante, P. Braun-Munzinger, J. A. Briffa, D. Britzger, S. J. Brodsky, J. J. Brooke, R. Bruce, P. Brückman De Renstrom, E. Bruna, O. Brüning, O. Brunner, K. Brunner, P. Bruzzone, X. Buffat, E. Bulyak, F. Burkart, H. Burkhardt, J.-P. Burnet, F. Butin, D. Buttazzo, A. Butterworth, M. Caccia, Y. Cai, B. Caiffi, V. Cairo, O. Cakir, R. Calaga, S. Calatroni, G. Calderini, G. Calderola, A. Caliskan, D. Calvet, M. Calviani, J. M. Camalich, P. Camarri, M. Campanelli, T. Camporesi, A. C. Canbay, A. Canepa, E. Cantergiani, D. Cantore-Cavalli, M. Capeans, R. Cardarelli, U. Cardella, A. Cardini, C. M. Carloni Calame, F. Carra, S. Carra, A. Carvalho, S. Casalbuoni, J. Casas, M. Cascella, P. Castelnovo, G. Castorina, G. Catalano, V. Cavasinni, E. Cazzato, E. Cennini, A. Cerri, F. Cerutti, J. Cervantes, I. Chaikovska, J. Chakrabortty, M. Chala, M. Chamizo-Llatas, H. Chanal, D. Chanal, S. Chance, A. Chancé, P. Charitos, J. Charles, T. K. Charles, S. Chattopadhyay, R. Chehab, S. V. Chekanov, N. Chen, A. Chernoded, V. Chetvertkova, L. Chevalier, G. Chiarelli, G. Chiarello, M. Chiesa, P. Chiggiato, J. T. Childers, A. Chmielińska, A. Cholakian, P. Chomaz, M. Chorowski, W. Chou, M. Chrzaszcz, E. Chyhyrynets, G. Cibinetto, A. K. Ciftci, R. Ciftci, R. Cimino, M. Ciuchini, P. J. Clark, Y. Coadou, M. Cobal, A. Coccaro, J. Cogan, E. Cogneras, F. Collamati, C. Colldelram, P. Collier, J. Collot, R. Contino, F. Conventi, C. T. A. Cook, L. Cooley, G. Corcella, A. S. Cornell, G. H. Corral, H. Correia-Rodrigues, F. Costanza, P. Costa Pinto, F. Couderc, J. Coupard, N. Craig, I. Crespo Garrido, A. Crivellin, J. F. Croteau, M. Crouch, E. Cruz Alaniz, B. Curé, J. Curti, D. Curtin, M. Czech, C. Dachauer, R. T. D’Agnolo, M. Daibo, A. Dainese, B. Dalena, A. Daljevec, W. Dallapiazza, L. D’Aloia Schwartzentruber, M. Dam, G. D’Ambrosio, S. P. Das, S. DasBakshi, W. da Silva, G. G. da Silveira, V. D’Auria, S. D’Auria, A. David, T. Davidek, A. Deandrea, J. de Blas, C. J. Debono, S. De Curtis, N. De Filippis, D. de Florian, S. Deghaye, S. J. de Jong, C. Del Bo, V. Del Duca, D. Delikaris, F. Deliot, A. Dell’Acqua, L. Delle Rose, M. Delmastro, E. De Lucia, M. Demarteau, D. Denegri, L. Deniau, D. Denisov, H. Denizli, A. Denner, D. d’Enterria, G. de Rijk, A. De Roeck, F. Derue, O. Deschamps, S. Descotes-Genon, P. S. B. Dev, J. B. de Vivie de Régie, R. K. Dewanjee, A. Di Ciaccio, A. Di Cicco, B. M. Dillon, B. Di Micco, P. Di Nezza, S. Di Vita, A. Doblhammer, A. Dominjon, M. D’Onofrio, F. Dordei, A. Drago, P. Draper, Z. Drasal, M. Drewes, L. Duarte, I. Dubovyk, P. Duda, A. Dudarev, L. Dudko, D. Duellmann, M. Dünser, T. du Pree, M. Durante, H. Duran Yildiz, S. Dutta, F. Duval, J. M. Duval, Ya. Dydyshka, B. Dziewit, S. Eisenhardt, M. Eisterer, T. Ekelof, D. El Khechen, S. A. Ellis, J. Ellis, J. A. Ellison, K. Elsener, M. Elsing, Y. Enari, C. Englert, H. Eriksson, K. J. Eskola, L. S. Esposito, O. Etisken, E. Etzion, P. Fabbricatore, A. Falkowski, A. Falou, J. Faltova, J. Fan, L. Fanò, A. Farilla, R. Farinelli, S. Farinon, D. A. Faroughy, S. D. Fartoukh, A. Faus-Golfe, W. J. Fawcett, G. Felici, L. Felsberger, C. Ferdeghini, A. M. Fernandez Navarro, A. Fernández-Téllez, J. Ferradas Troitino, G. Ferrara, R. Ferrari, L. Ferreira, P. Ferreira da Silva, G. Ferrera, F. Ferro, M. Fiascaris, S. Fiorendi, C. Fiorio, O. Fischer, E. Fischer, W. Flieger, M. Florio, D. Fonnesu, E. Fontanesi, N. Foppiani, K. Foraz, D. Forkel-Wirth, S. Forte, M. Fouaidy, D. Fournier, T. Fowler, J. Fox, P. Francavilla, R. Franceschini, S. Franchino, E. Franco, A. Freitas, B. Fuks, K. Furukawa, S. V. Furuseth, E. Gabrielli, A. Gaddi, M. Galanti, E. Gallo, S. Ganjour, Jia. Gao, Jie. Gao, V. Garcia Diaz, M. García Pérez, L. García Tabarés, C. Garion, M. V. Garzelli, I. Garzia, S. M. Gascon-Shotkin, G. Gaudio, P. Gay, S.-F. Ge, T. Gehrmann, M. H. Genest, R. Gerard, F. Gerigk, H. Gerwig, P. Giacomelli, S. Giagu, E. Gianfelice-Wendt, F. Gianotti, F. Giffoni, S. S. Gilardoni, M. Gil Costa, M. Giovannetti, M. Giovannozzi, P. Giubellino, G. F. Giudice, A. Giunta, L. K. Gladilin, S. Glukhov, J. Gluza, G. Gobbi, B. Goddard, F. Goertz, T. Golling, D. Gonçalves, V. P. Goncalves, R. Gonçalo, L. A. Gonzalez Gomez, S. Gorgi Zadeh, G. Gorine, E. Gorini, S. A. Gourlay, L. Gouskos, F. Grancagnolo, A. Grassellino, A. Grau, E. Graverini, H. M. Gray, Ma. Greco, Mi. Greco, J.-L. Grenard, O. Grimm, C. Grojean, V. A. Gromov, J. F. Grosse-Oetringhaus, A. Grudiev, K. Grzanka, J. Gu, D. Guadagnoli, V. Guidi, S. Guiducci, G. Guillermo Canton, Y. O. Günaydin, R. Gupta, R. S. Gupta, J. Gutierrez, J. Gutleber, C. Guyot, V. Guzey, C. Gwenlan, Ch. Haberstroh, B. Hacışahinoğlu, B. Haerer, K. Hahn, T. Hahn, A. Hammad, C. Han, M. Hance, A. Hannah, P. C. Harris, C. Hati, S. Haug, J. Hauptman, V. Haurylavets, H-J. He, A. Hegglin, B. Hegner, K. Heinemann, S. Heinemeyer, C. Helsens, Ana. Henriques, And. Henriques, P. Hernandez, R. J. Hernández-Pinto, J. Hernandez-Sanchez, T. Herzig, I. Hiekkanen, W. Hillert, T. Hoehn, M. Hofer, W. Höfle, F. Holdener, S. Holleis, B. Holzer, D. K. Hong, C. G. Honorato, S. C. Hopkins, J. Hrdinka, F. Hug, B. Humann, H. Humer, T. Hurth, A. Hutton, G. Iacobucci, N. Ibarrola, L. Iconomidou-Fayard, K. Ilyina-Brunner, J. Incandela, A. Infantino, V. Ippolito, M. Ishino, R. Islam, H. Ita, A. Ivanovs, S. Iwamoto, A. Iyer, S. Izquierdo Bermudez, S. Jadach, D. O. Jamin, P. Janot, P. Jarry, A. Jeff, P. Jenny, E. Jensen, M. Jensen, X. Jiang, J. M. Jiménez, M. A. Jones, O. R. Jones, J. M. Jowett, S. Jung, W. Kaabi, M. Kado, K. Kahle, L. Kalinovskaya, J. Kalinowski, J. F. Kamenik, K. Kannike, S. O. Kara, H. Karadeniz, V. Karaventzas, I. Karpov, S. Kartal, A. Karyukhin, V. Kashikhin, J. Katharina Behr, U. Kaya, J. Keintzel, P. A. Keinz, K. Keppel, R. Kersevan, K. Kershaw, H. Khanpour, S. Khatibi, M. Khatiri Yanehsari, V. V. Khoze, J. Kieseler, A. Kilic, A. Kilpinen, Y.-K. Kim, D. W. Kim, U. Klein, M. Klein, F. Kling, N. Klinkenberg, S. Klöppel, M. Klute, V. I. Klyukhin, M. Knecht, B. Kniehl, F. Kocak, C. Koeberl, A. M. Kolano, A. Kollegger, K. Kołodziej, A. A. Kolomiets, J. Komppula, I. Koop, P. Koppenburg, M. Koratzinos, M. Kordiaczyńska, M. Korjik, O. Kortner, P. Kostka, W. Kotlarski, C. Kotnig, T. Köttig, A. V. Kotwal, A. D. Kovalenko, S. Kowalski, J. Kozaczuk, G. A. Kozlov, S. S. Kozub, A. M. Krainer, T. Kramer, M. Krämer, M. Krammer, A. A. Krasnov, F. Krauss, K. Kravalis, L. Kretzschmar, R. M. Kriske, H. Kritscher, P. Krkotic, H. Kroha, M. Kucharczyk, S. Kuday, A. Kuendig, G. Kuhlmann, A. Kulesza, Mi. Kumar, Mu. Kumar, A. Kusina, S. Kuttimalai, M. Kuze, T. Kwon, F. Lackner, M. Lackner, E. La Francesca, M. Laine, G. Lamanna, S. La Mendola, E. Lançon, G. Landsberg, P. Langacker, C. Lange, A. Langner, A. J. Lankford, J. P. Lansberg, T. Lari, P. J. Laycock, P. Lebrun, A. Lechner, K. Lee, S. Lee, R. Lee, T. Lefevre, P. Le Guen, T. Lehtinen, S. B. Leith, P. Lenzi, E. Leogrande, C. Leonidopoulos, I. Leon-Monzon, G. Lerner, O. Leroy, T. Lesiak, P. Lévai, A. Leveratto, E. Levichev, G. Li, S. Li, R. Li, D. Liberati, M. Liepe, D. A. Lissauer, Z. Liu, A. Lobko, E. Locci, E. Logothetis Agaliotis, M. P. Lombardo, A. J. Long, C. Lorin, R. Losito, A. Louzguiti, I. Low, D. Lucchesi, M. T. Lucchini, A. Luciani, M. Lueckhof, A. J. G. Lunt, M. Luzum, D. A. Lyubimtsev, M. Maggiora, N. Magnin, M. A. Mahmoud, F. Mahmoudi, J. Maitre, V. Makarenko, A. Malagoli, J. Malclés, L. Malgeri, P. J. Mallon, F. Maltoni, S. Malvezzi, O. B. Malyshev, G. Mancinelli, P. Mandrik, P. Manfrinetti, M. Mangano, P. Manil, M. Mannelli, G. Marchiori, F. Marhauser, V. Mariani, V. Marinozzi, S. Mariotto, P. Marquard, C. Marquet, T. Marriott-Dodington, R. Martin, O. Martin, J. Martin Camalich, T. Martinez, H. Martinez Bruzual, M. I. Martínez-Hernández, D. E. Martins, S. Marzani, D. Marzocca, L. Marzola, S. Masciocchi, I. Masina, A. Massimiliano, A. Massironi, T. Masubuchi, V. A. Matveev, M. A. Mazzoni, M. McCullough, P. A. McIntosh, P. Meade, L. Medina, A. Meier, J. Meignan, B. Mele, J. G. Mendes Saraiva, F. Menez, M. Mentink, E. Meoni, P. Meridiani, M. Merk, P. Mermod, V. Mertens, L. Mether, E. Métral, M. Migliorati, A. Milanese, C. Milardi, G. Milhano, B. L. Militsyn, F. Millet, I. Minashvili, J. V. Minervini, L. S. Miralles, D. Mirarchi, S. Mishima, D. P. Missiaen, G. Mitselmakher, T. Mitsuhashi, J. Mnich, M. Mohammadi Najafabadi, R. N. Mohapatra, N. Mokhov, J. G. Molson, R. Monge, C. Montag, G. Montagna, S. Monteil, G. Montenero, E. Montesinos, F. Moortgat, N. Morange, G. Morello, M. Moreno Llácer, M. Moretti, S. Moretti, A. K. Morley, A. Moros, I. Morozov, V. Morretta, M. Morrone, A. Mostacci, S. Muanza, N. Muchnoi, M. Mühlegger, M. Mulder, M. Mulders, B. Müller, F. Müller, A.-S. Müller, J. Munilla, M. J. Murray, Y. Muttoni, S. Myers, M. Mylona, J. Nachtman, T. Nakamoto, M. Nardecchia, G. Nardini, P. Nason, Z. Nergiz, A. V. Nesterenko, A. Nettsträter, C. Neubüser, J. Neundorf, F. Niccoli, O. Nicrosini, Y. Nie, U. Niedermayer, J. Niedziela, A. Niemi, S. A. Nikitin, A. Nisati, J. M. No, M. Nonis, Y. Nosochkov, M. Novák, A. Novokhatski, J. M. O’Callaghan, C. Ochando, S. Ogur, K. Ohmi, K. Oide, V. A. Okorokov, Y. Okumura, C. Oleari, F. I. Olness, Y. Onel, M. Ortino, J. Osborne, P. Osland, T. Otto, K. Y. Oyulmaz, A. Ozansoy, V. Özcan, K. Özdemir, C. E. Pagliarone, H. F. Pais da Silva, E. Palmieri, L. Palumbo, A. Pampaloni, R.-Q. Pan, M. Panareo, O. Panella, G. Panico, G. Panizzo, A. A. Pankov, V. Pantsyrny, C. G. Papadopoulos, A. Papaefstathiou, Y. Papaphilippou, M. A. Parker, V. Parma, M. Pasquali, S. K. Patra, R. Patterson, H. Paukkunen, F. Pauss, S. Peggs, J.-P. Penttinen, G. Peón, E. E. Perepelkin, E. Perez, J. C. Perez, G. Perez, F. Pérez, E. Perez Codina, J. Perez Morales, M. Perfilov, H. Pernegger, M. Peruzzi, C. Pes, K. Peters, S. Petracca, F. Petriello, L. Pezzotti, S. Pfeiffer, F. Piccinini, T. Pieloni, M. Pierini, H. Pikhartova, G. Pikurs, E. Pilicer, P. Piminov, C. Pira, R. Pittau, W. Płaczek, M. Plagge, T. Plehn, M.-A. Pleier, M. Płoskoń, M. Podeur, H. Podlech, T. Podzorny, L. Poggioli, A. Poiron, G. Polesello, M. Poli Lener, A. Polini, J. Polinski, S. M. Polozov, L. Ponce, M. Pont, L. Pontecorvo, T. Portaluri, K. Potamianos, C. Prasse, M. Prausa, A. Preinerstorfer, E. Premat, T. Price, M. Primavera, F. Prino, M. Prioli, J. Proudfoot, A. Provino, T. Pugnat, N. Pukhaeva, S. Puławski, D. Pulikowski, G. Punzi, M. Putti, A. Pyarelal, H. Quack, M. Quispe, A. Racioppi, H. Rafique, V. Raginel, M. Raidal, N. S. Ramírez-Uribe, M. J. Ramsey-Musolf, R. Rata, P. Ratoff, F. Ravotti, P. Rebello Teles, M. Reboud, S. Redaelli, E. Renner, A. E. Rentería-Olivo, M. Rescigno, J. Reuter, A. Ribon, A. M. Ricci, W. Riegler, S. Riemann, B. Riemann, T. Riemann, J. M. Rifflet, R. A. Rimmer, R. Rinaldesi, L. Rinolfi, O. Rios Rubiras, T. Risselada, A. Rivetti, L. Rivkin, T. Rizzo, T. Robens, F. Robert, A. J. Robson, E. Rochepault, C. Roda, G. Rodrigo, M. Rodríguez-Cahuantzi, C. Rogan, M. Roig, S. Rojas-Torres, J. Rojo, G. Rolandi, G. Rolando, P. Roloff, A. Romanenko, A. Romanov, F. Roncarolo, A. Rosado Sanchez, G. Rosaz, L. Rossi, A. Rossi, R. Rossmanith, B. Rousset, C. Royon, X. Ruan, I. Ruehl, V. Ruhlmann-Kleider, R. Ruiz, L. Rumyantsev, R. Ruprecht, A. I. Ryazanov, A. Saba, R. Sadykov, D. Saez de Jauregui, M. Sahin, B. Sailer, M. Saito, F. Sala, G. P. Salam, J. Salfeld-Nebgen, C. A. Salgado, S. Salini, J. M. Sallese, T. Salmi, A. Salzburger, O. A. Sampayo, S. Sanfilippo, J. Santiago, E. Santopinto, R. Santoro, A. Sanz Ull, X. Sarasola, I. H. Sarpün, M. Sauvain, S. Savelyeva, R. Sawada, G. F. R. Sborlini, A. Schaffer, M. Schaumann, M. Schenk, C. Scheuerlein, I. Schienbein, K. Schlenga, H. Schmickler, R. Schmidt, D. Schoerling, A. Schoning, T. Schörner-Sadenius, M. Schott, D. Schulte, P. Schwaller, C. Schwanenberger, P. Schwemling, N. Schwerg, L. Scibile, A. Sciuto, E. Scomparin, C. Sebastiani, B. Seeber, M. Segreti, P. Selva, M. Selvaggi, C. Senatore, A. Senol, L. Serin, M. Serluca, N. Serra, A. Seryi, L. Sestini, A. Sfyrla, M. Shaposhnikov, E. Shaposhnikova, B. Yu. Sharkov, D. Shatilov, J. Shelton, V. Shiltsev, I. P. Shipsey, G. D. Shirkov, A. Shivaji, D. Shwartz, T. Sian, S. Sidorov, A. Siemko, L. Silvestrini, N. Simand, F. Simon, B. K. Singh, A. Siódmok, Y. Sirois, E. Sirtori, R. Sirvinskaite, B. Sitar, T. Sjöstrand, P. Skands, E. Skordis, K. Skovpen, M. Skrzypek, E. Slade, P. Slavich, R. Slovak, V. Smaluk, V. Smirnov, W. Snoeys, L. Soffi, P. Sollander, O. Solovyanov, H. K. Soltveit, H. Song, P. Sopicki, M. Sorbi, L. Spallino, M. Spannowsky, B. Spataro, P. Sphicas, H. Spiesberger, P. Spiller, M. Spira, T. Srivastava, J. Stachel, A. Stakia, J. L. Stanyard, E. Starchenko, A. Yu. Starikov, A. M. Staśto, M. Statera, R. Steerenberg, J. Steggemann, A. Stenvall, F. Stivanello, D. Stöckinger, L. S. Stoel, M. Stöger-Pollach, B. Strauss, M. Stuart, G. Stupakov, S. Su, A. Sublet, K. Sugita, L. Sulak, M. K. Sullivan, S. Sultansoy, T. Sumida, K. Suzuki, G. Sylva, M. J. Syphers, A. Sznajder, M. Taborelli, N. A. Tahir, E. Tal Hod, M. Takeuchi, C. Tambasco, J. Tanaka, K. Tang, I. Tapan, S. Taroni, G. F. Tartarelli, G. Tassielli, L. Tavian, T. M. Taylor, G. N. Taylor, A. M. Teixeira, G. Tejeda-Muñoz, V. I. Telnov, R. Tenchini, H. H. J. ten Kate, K. Terashi, A. Tesi, M. Testa, C. Tetrel, D. Teytelman, J. Thaler, A. Thamm, S. Thomas, M. T. Tiirakari, V. Tikhomirov, D. Tikhonov, H. Timko, V. Tisserand, L. M. Tkachenko, J. Tkaczuk, J. Ph. Tock, B. Todd, E. Todesco, R. Tomás Garcia, D. Tommasini, G. Tonelli, F. Toral, T. Torims, R. Torre, Z. Townsend, R. Trant, D. Treille, L. Trentadue, A. Tricoli, A. Tricomi, W. Trischuk, I. S. Tropin, B. Tuchming, A. A. Tudora, B. Turbiarz, I. Turk Cakir, M. Turri, T. Tydecks, J. Usovitsch, J. Uythoven, R. Vaglio, A. Valassi, F. Valchkova, M. A. Valdivia Garcia, P. Valente, R. U. Valente, A.-M. Valente-Feliciano, G. Valentino, L. Vale Silva, J. M. Valet, R. Valizadeh, J. W. F. Valle, S. Vallecorsa, G. Vallone, M. van Leeuwen, U. H. van Rienen, L. van Riesen-Haupt, M. Varasteh, L. Vecchi, P. Vedrine, G. Velev, R. Veness, A. Ventura, W. Venturini Delsolaro, M. Verducci, C. B. Verhaaren, C. Vernieri, A. P. Verweij, O. Verwilligen, O. Viazlo, A. Vicini, G. Viehhauser, N. Vignaroli, M. Vignolo, A. Vitrano, I. Vivarelli, S. Vlachos, M. Vogel, D. M. Vogt, V. Völkl, P. Volkov, G. Volpini, J. von Ahnen, G. Vorotnikov, G. G. Voutsinas, V. Vysotsky, U. Wagner, R. Wallny, L.-T. Wang, R. Wang, K. Wang, B. F. L. Ward, T. P. Watson, N. K. Watson, Z. Wa̧s, C. Weiland, S. Weinzierl, C. P. Welsch, J. Wenninger, M. Widorski, U. A. Wiedemann, H.-U. Wienands, G. Wilkinson, P. H. Williams, A. Winter, A. Wohlfahrt, T. Wojtoń, D. Wollmann, J. Womersley, D. Woog, X. Wu, A. Wulzer, M. K. Yanehsari, G. Yang, H. J. Yang, W.-M. Yao, E. Yazgan, V. Yermolchik, Ay. Yilmaz, Al. Yilmaz, H.-D. Yoo, S. A. Yost, T. You, C. Young, T.-T. Yu, F. Yu, A. Zaborowska, S. G. Zadeh, M. Zahnd, M. Zanetti, L. Zanotto, L. Zawiejski, P. Zeiler, M. Zerlauth, S. M. Zernov, G. Zevi Dell Porta, Z. Zhang, Y. Zhang, C. Zhang, H. Zhang, Z. Zhao, Y.-M. Zhong, J. Zhou, D. Zhou, P. Zhuang, G. Zick, F. Zimmermann, J. Zinn-Justin, L. Zivkovic, A. V. Zlobin, M. Zobov, J. Zupan, J. Zurita, and The FCC Collaboration
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We review the physics opportunities of the Future Circular Collider, covering its e+e-, pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, the top quark and flavour, as well as phenomena beyond the Standard Model. We highlight the synergy and complementarity of the different colliders, which will contribute to a uniquely coherent and ambitious research programme, providing an unmatchable combination of precision and sensitivity to new physics.
Published: 2019
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11. Hadron collider sensitivity to fat flavourful Z ′s for R K ∗ $$ {R}_{K^{\left(\ast \right)}} $$

Author: B. C. Allanach, Tyler Corbett, Matthew J. Dolan, and Tevong You
Subjects: Beyond Standard Model, GUT, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We further investigate the case where new physics in the form of a massive Z ′ particle explains apparent measurements of lepton flavour non-universality in B → K (*) l + l − decays. Hadron collider sensitivities for direct production of such Z ′s have been previously studied in the narrow width limit for a μ + μ − final state. Here, we extend the analysis to sizeable decay widths and improve the sensitivity estimate for the narrow width case. We estimate the sensitivities of the high luminosity 14 TeV Large Hadron Collider (HL-LHC), a high energy 27 TeV LHC (HE-LHC), as well as a potential 100 TeV future circular collider (FCC). The HL-LHC has sensitivity to narrow Z ′ resonances consistent with the anomalies. In one of our simplified models the FCC could probe 23 TeV Z ′ particles with widths of up to 0.35 of their mass at 95% confidence level (CL). In another model, the HL-LHC and HE-LHC cover sizeable portions of parameter space, but the whole of perturbative parameter space can be covered by the FCC.
Published: 2019
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12. An anomaly-free atlas: charting the space of flavour-dependent gauged U(1) extensions of the Standard Model

Author: B. C. Allanach, Joe Davighi, and Scott Melville
Subjects: Beyond Standard Model, Effective Field Theories, Quark Masses and SM Parameters, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Spontaneously broken, flavour-dependent, gauged U(1) extensions of the Standard Model (SM) have many phenomenological uses. We chart the space of solutions to the gauge anomaly cancellation equations in such extensions, for both the SM chiral fermion content and the SM plus (up to) three right-handed neutrinos (SMν R ). Methods from Diophantine analysis allow us to efficiently index the solutions arithmetically, and produce the complete solution space in particular cases. In order to solve the general case, we build a computer program which cycles through possible U(1) charge assignments, providing all solutions for charges up to some pre-defined maximum absolute charge. Lists of anomaly-free U(1) charge assignments result, which corroborate the results of our Diophantine analysis. We make these lists, which may be queried for further desirable properties, publicly available. This previously uncharted space of anomaly-free charge assignments has been little explored until now, paving the way for future model building and phenomenological studies.
Published: 2019
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13. Third family hypercharge model for R K ∗ $$ {R}_{K^{\left(\ast \right)}} $$ and aspects of the fermion mass problem

Author: B. C. Allanach and Joe Davighi
Subjects: Beyond Standard Model, Quark Masses and SM Parameters, Heavy Quark Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We present a model to explain LHCb’s recent measurements of R K and R K ∗ $$ {R}_{K^{\left(\ast \right)}} $$ based on an anomaly-free, spontaneously-broken U(1) F gauge symmetry, without any fermionic fields beyond those of the Standard Model (SM). The model explains the hierarchical heaviness of the third family and the smallness of quark mixing. The U(1) F charges of the third family of SM fields and the Higgs doublet are set equal to their respective hypercharges. A heavy Z′ particle with flavour-dependent couplings can modify the b L ¯ γ ρ s L μ L ¯ γ ρ μ L $$ \left[\overline{b_L}{\gamma}^{\rho }{s}_L\right]\left[\overline{\mu_L}{\gamma}_{\rho }{\mu}_L\right] $$ effective vertex in the desired way. The Z′ contribution to B s − B s ¯ $$ {B}_s-\overline{B_s} $$ mixing is suppressed by a small mixing angle connected to V ts , making the constraint coming from its measurement easier to satisfy. The model can explain R K and R K * $$ {R}_{K^{*}} $$ whilst simultaneously passing other constraints, including measurements of the lepton flavour universality of Z couplings.
Published: 2018
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14. Uncertainties in the lightest $$CP$$ CP even Higgs boson mass prediction in the minimal supersymmetric standard model: fixed order versus effective field theory prediction

Author: B. C. Allanach and A. Voigt
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We quantify and examine the uncertainties in predictions of the lightest $$CP$$ CP even Higgs boson pole mass $$M_h$$ Mh in the Minimal Supersymmetric Standard Model ($${\text {MSSM}}$$ MSSM ), utilising current spectrum generators and including some three-loop corrections. There are two broadly different approximations being used: effective field theory (EFT) where an effective Standard Model ($$\text {SM}$$ SM ) is used below a supersymmetric mass scale, and a fixed order calculation, where the $${\text {MSSM}}$$ MSSM is matched to $$\text {QCD}\times \text {QED}$$ QCD×QED at the electroweak scale. The uncertainties on the $$M_h$$ Mh prediction in each approach are broken down into logarithmic and finite pieces. The inferred values of the stop mass parameters are sensitively dependent upon the precision of the prediction for $$M_h$$ Mh . The fixed order calculation appears to be more accurate below a supersymmetry (SUSY) mass scale of $$M_S\approx 1.2~\text {TeV}$$ MS≈1.2TeV , whereas above this scale, the EFT calculation is more accurate. We also revisit the range of the lightest stop mass across fine-tuned parameter space that has an appropriate stable vacuum and is compatible with the lightest $$CP$$ CP even Higgs boson h being identified with the one discovered at the ATLAS and CMS experiments in 2012; we achieve a maximum value of $$\sim 10^{11}$$ ∼1011 GeV.
Published: 2018
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15. The case for future hadron colliders from B → K (*) μ + μ − decays

Author: B. C. Allanach, Ben Gripaios, and Tevong You
Subjects: Beyond Standard Model, Heavy Quark Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Recent measurements in B → K (*) μ + μ − decays are somewhat discrepant with Standard Model predictions. They may be harbingers of new physics at an energy scale potentially accessible to direct discovery. We estimate the sensitivity of future hadron colliders to the possible new particles that may be responsible for the anomalies at tree-level: leptoquarks or Z′s. We consider luminosity upgrades for a 14 TeV LHC, a 33 TeV LHC, and a 100 TeV pp collider such as the FCC-hh. In the most conservative and pessimistic models, for narrow particles with perturbative couplings, Z′ masses up to 20 TeV and leptoquark masses up to 41 TeV may in principle explain the anomalies. Coverage of Z′ models is excellent: a 33 TeV 1 ab−1 LHC is expected to cover most of the parameter space up to 8 TeV in mass, whereas the 100 TeV FCC-hh with 10 ab−1 will cover all of it. A smaller portion of the leptoquark parameter space is covered by future colliders: for example, in a μ + μ − jj di-leptoquark search, a 100 TeV 10 ab−1 collider has a projected sensitivity up to leptoquark masses of 12 TeV (extendable to 21 TeV with a strong coupling for single leptoquark production).
Published: 2018
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16. Erratum to: $$U(1)_{B_3-L_2}$$ U ( 1 ) B 3 - L 2 explanation of the neutral current $$B-$$ B - anomalies

Author: B. C. Allanach
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: A Correction to this paper has been published https://doi.org/10.1140/epjc/s10052-021-08855-w
Published: 2021
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17. Dissecting multi-photon resonances at the large hadron collider

Author: B. C. Allanach, D. Bhatia, and Abhishek M. Iyer
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract We examine the phenomenology of the production, at the 13 TeV Large Hadron Collider (LHC), of a heavy resonance X, which decays via other new on-shell particles n into multi-(i.e. three or more) photon final states. In the limit that n has a much smaller mass than X, the multi-photon final state may dominantly appear as a two-photon final state because the $$\gamma $$ γ s from the n decay are highly collinear and remain unresolved. We discuss how to discriminate this scenario from $$X \rightarrow \gamma \gamma $$ X → γ γ : rather than discarding non-isolated photons, it is better to relax the isolation criteria and instead form photon jets substructure variables. The spins of X and n leave their imprint upon the distribution of pseudo-rapidity gap $$\Delta \eta $$ Δ η between the apparent two-photon states. Depending on the total integrated luminosity, this can be used in many cases to claim discrimination between the possible spin choices of X and n, although the case where X and n are both scalar particles cannot be discriminated from the direct $$X \rightarrow \gamma \gamma $$ X → γ γ decay in this manner. Information on the mass of n can be gained by considering the mass of each photon jet.
Published: 2017
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18. Erratum: Semisimple extensions of the Standard Model gauge algebra [Phys. Rev. D 104 , 035035 (2021)]

Author: B. C. Allanach, Ben Gripaios, and Joseph Tooby-Smith
Published: 2022
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19. Review of Particle Physics (RPP 2020)

Author: P A Zyla, R M Barnett, J Beringer, O Dahl, D A Dwyer, D E Groom, C -J Lin, K S Lugovsky, E Pianori, D J Robinson, C G Wohl, W -M Yao, K Agashe, G Aielli, B C Allanach, C Amsler, M Antonelli, E C Aschenauer, D M Asner, H Baer, Sw Banerjee, L Baudis, C W Bauer, J J Beatty, V I Belousov, S Bethke, A Bettini, O Biebel, K M Black, E Blucher, O Buchmuller, V Burkert, M A Bychkov, R N Cahn, M Carena, A Ceccucci, A Cerri, D Chakraborty, R Sekhar Chivukula, G Cowan, G D'Ambrosio, T Damour, D de Florian, A de Gouvêa, T DeGrand, P de Jong, G Dissertori, B A Dobrescu, M D'Onofrio, M Doser, M Drees, H K Dreiner, P Eerola, U Egede, S Eidelman, J Ellis, J Erler, V V Ezhela, W Fetscher, B D Fields, B Foster, A Freitas, H Gallagher, L Garren, H -J Gerber, G Gerbier, T Gershon, Y Gershtein, T Gherghetta, A A Godizov, M C Gonzalez-Garcia, M Goodman, C Grab, A V Gritsan, C Grojean, M Grünewald, A Gurtu, T Gutsche, H E Haber, C Hanhart, S Hashimoto, Y Hayato, A Hebecker, S Heinemeyer, B Heltsley, J J Hernández-Rey, K Hikasa, J Hisano, A Höcker, J Holder, A Holtkamp, J Huston, T Hyodo, K F Johnson, M Kado, M Karliner, U F Katz, M Kenzie, V A Khoze, S R Klein, E Klempt, R V Kowalewski, F Krauss, M Kreps, B Krusche, Y Kwon, O Lahav, J Laiho, L P Lellouch, J Lesgourgues, A R Liddle, Z Ligeti, C Lippmann, T M Liss, L Littenberg, C Lourengo, S B Lugovsky, A Lusiani, Y Makida, F Maltoni, T Mannel, A V Manohar, W J Marciano, A Masoni, J Matthews, U -G Meißner, M Mikhasenko, D J Miller, D Milstead, R E Mitchell, K Mönig, P Molaro, F Moortgat, M Moskovic, K Nakamura, M Narain, P Nason, S Navas, M Neubert, P Nevski, Y Nir, K A Olive, C Patrignani, J A Peacock, S T Petcov, V A Petrov, A Pich, A Piepke, A Pomarol, S Profumo, A Quadt, K Rabbertz, J Rademacker, G Raffelt, H Ramani, M Ramsey-Musolf, B N Ratcliff, P Richardson, A Ringwald, S Roesler, S Rolli, A Romaniouk, L J Rosenberg, J L Rosner, G Rybka, M Ryskin, R A Ryutin, Y Sakai, G P Salam, S Sarkar, F Sauli, O Schneider, K Scholberg, A J Schwartz, J Schwiening, D Scott, V Sharma, S R Sharpe, T Shutt, M Silari, T Sjöstrand, P Skands, T Skwarnicki, G F Smoot, A Soffer, M S Sozzi, S Spanier, C Spiering, A Stahl, S L Stone, Y Sumino, T Sumiyoshi, M J Syphers, F Takahashi, M Tanabashi, J Tanaka, M Taševský, K Terashi, J Terning, U Thoma, R S Thorne, L Tiator, M Titov, N P Tkachenko, D R Tovey, K Trabelsi, P Urquijo, G Valencia, R Van de Water, N Varelas, G Venanzoni, L Verde, M G Vincter, P Vogel, W Vogelsang, A Vogt, V Vorobyev, S P Wakely, W Walkowiak, C W Walter, D Wands, M O Wascko, D H Weinberg, E J Weinberg, M White, L R Wiencke, S Willocq, C L Woody, R L Workman, M Yokoyama, R Yoshida, G Zanderighi, G P Zeller, O V Zenin, R -Y Zhu, S -L Zhu, F Zimmermann, J Anderson, T Basaglia, V S Lugovsky, P Schaffner, W Zheng, P A Zyla, R M Barnett, J Beringer, O Dahl, D A Dwyer, D E Groom, C -J Lin, K S Lugovsky, E Pianori, D J Robinson, C G Wohl, W -M Yao, K Agashe, G Aielli, B C Allanach, C Amsler, M Antonelli, E C Aschenauer, D M Asner, H Baer, Sw Banerjee, L Baudi, C W Bauer, J J Beatty, V I Belousov, S Bethke, A Bettini, O Biebel, K M Black, E Blucher, O Buchmuller, V Burkert, M A Bychkov, R N Cahn, M Carena, A Ceccucci, A Cerri, D Chakraborty, R Sekhar Chivukula, G Cowan, G D'Ambrosio, T Damour, D de Florian, A de Gouvêa, T DeGrand, P de Jong, G Dissertori, B A Dobrescu, M D'Onofrio, M Doser, M Dree, H K Dreiner, P Eerola, U Egede, S Eidelman, J Elli, J Erler, V V Ezhela, W Fetscher, B D Field, B Foster, A Freita, H Gallagher, L Garren, H -J Gerber, G Gerbier, T Gershon, Y Gershtein, T Gherghetta, A A Godizov, M C Gonzalez-Garcia, M Goodman, C Grab, A V Gritsan, C Grojean, M Grünewald, A Gurtu, T Gutsche, H E Haber, C Hanhart, S Hashimoto, Y Hayato, A Hebecker, S Heinemeyer, B Heltsley, J J Hernández-Rey, K Hikasa, J Hisano, A Höcker, J Holder, A Holtkamp, J Huston, T Hyodo, K F Johnson, M Kado, M Karliner, U F Katz, M Kenzie, V A Khoze, S R Klein, E Klempt, R V Kowalewski, F Krau, M Krep, B Krusche, Y Kwon, O Lahav, J Laiho, L P Lellouch, J Lesgourgue, A R Liddle, Z Ligeti, C Lippmann, T M Li, L Littenberg, C Lourengo, S B Lugovsky, A Lusiani, Y Makida, F Maltoni, T Mannel, A V Manohar, W J Marciano, A Masoni, J Matthew, U -G Meißner, M Mikhasenko, D J Miller, D Milstead, R E Mitchell, K Mönig, P Molaro, F Moortgat, M Moskovic, K Nakamura, M Narain, P Nason, S Nava, M Neubert, P Nevski, Y Nir, K A Olive, C Patrignani, J A Peacock, S T Petcov, V A Petrov, A Pich, A Piepke, A Pomarol, S Profumo, A Quadt, K Rabbertz, J Rademacker, G Raffelt, H Ramani, M Ramsey-Musolf, B N Ratcliff, P Richardson, A Ringwald, S Roesler, S Rolli, A Romaniouk, L J Rosenberg, J L Rosner, G Rybka, M Ryskin, R A Ryutin, Y Sakai, G P Salam, S Sarkar, F Sauli, O Schneider, K Scholberg, A J Schwartz, J Schwiening, D Scott, V Sharma, S R Sharpe, T Shutt, M Silari, T Sjöstrand, P Skand, T Skwarnicki, G F Smoot, A Soffer, M S Sozzi, S Spanier, C Spiering, A Stahl, S L Stone, Y Sumino, T Sumiyoshi, M J Sypher, F Takahashi, M Tanabashi, J Tanaka, M Taševský, K Terashi, J Terning, U Thoma, R S Thorne, L Tiator, M Titov, N P Tkachenko, D R Tovey, K Trabelsi, P Urquijo, G Valencia, R Van de Water, N Varela, G Venanzoni, L Verde, M G Vincter, P Vogel, W Vogelsang, A Vogt, V Vorobyev, S P Wakely, W Walkowiak, C W Walter, D Wand, M O Wascko, D H Weinberg, E J Weinberg, M White, L R Wiencke, S Willocq, C L Woody, R L Workman, M Yokoyama, R Yoshida, G Zanderighi, G P Zeller, O V Zenin, R -Y Zhu, S -L Zhu, F Zimmermann, J Anderson, T Basaglia, V S Lugovsky, P Schaffner, and W Zheng
Subjects: High Energy Physics::Phenomenology, HEP, Particle Data Group
Abstract: he Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements from 878 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on High Energy Soft QCD and Diffraction and one on the Determination of CKM Angles from B Hadrons. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 98 review articles. Volume 2 consists of the Particle Listings and contains also 22 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print and as a web version optimized for use on phones as well as an Android app.
Published: 2020

20. Hide and Seek with the Third Family Hypercharge Model's $Z^\prime$ at the Large Hadron Collider

Author: B. C. Allanach and Hannah Banks
Subjects: High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics::Experiment, Engineering (miscellaneous), High Energy Physics - Experiment
Abstract: The Third Family Hypercharge Model predicts a $Z^\prime$ gauge boson with flavour dependent couplings which has been used to explain anomalies in meson decay processes which involve the $b\rightarrow s\mu^+\mu^-$ transition. The model predicts that a TeV-scale $Z^\prime$ should decay to particle-antiparticle pairs of muons, taus, top quarks and bottom quarks with appreciable branching ratios. We reinterpret various ATLAS and CMS search limits for $Z^\prime$ production followed by such decays at the LHC over a parameter space of the model that results from a successful combined fit to the $b\rightarrow s l^+ l^-$ data and precision electroweak observables. Current exclusions in parameter space and expected sensitivities of the various different channels in the high-luminosity run are compared. We find that the high-luminosity run of the LHC will significantly increase the sensitivity to the model beyond the existing observational limits, which we find to be surprisingly weak., Comment: 15 pages, 22 figures
Published: 2021
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21. Naturalising the third family hypercharge model for neutral current $$B{-}\hbox {anomalies}$$ <math><mrow><mi>B</mi><mo>-</mo><mtext>anomalies</mtext></mrow></math>

Author: B. C. Allanach and Joe Davighi
Subjects: High Energy Physics::Phenomenology, lcsh:QB460-466, lcsh:QC770-798, High Energy Physics::Experiment, lcsh:Astrophysics, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
Abstract: We consider a deformation of the Third Family Hypercharge Model, which arguably makes the model more natural. Additional non-zero charges of the spontaneously broken, family-dependent $$U(1)_F$$ U(1)F gauge symmetry are assigned to the second family leptons, and the third family leptons’ charges are deformed away from their hypercharges in such a way that the $$U(1)_F$$ U(1)F gauge symmetry remains anomaly-free. Second family $$U(1)_F$$ U(1)F lepton charges allow a $$Z^\prime $$ Z′ coupling to muons without having to assume large charged lepton mixing, which risks violating tight lepton flavour violation bounds. In this deformed version, only the bottom and top Yukawa couplings are generated at the renormalisable level, whereas the tauon Yukawa coupling is absent. The $$Z^\prime $$ Z′ mediates a beyond the Standard Model contribution to an effective $$({\bar{b}} s) (\bar{\mu }\mu )$$ (b¯s)(μ¯μ) vertex in the combination $$C_9=-9C_{10}$$ C9=-9C10 and is able to fit the apparent discrepancy between Standard Model predictions in flavour changing neutral-current $$B-$$ B- meson decays and their measurements, whilst simultaneously avoiding current constraints from direct $$Z^\prime $$ Z′ searches and other measurements, when $$0.8~\text {TeV}< M_{Z^\prime } < 12.5 ~\text {TeV}$$ 0.8TeV
Published: 2019

22. Review of Particle Physics

Author: J Lesgourgues, Siegfried Bethke, C. Hanhart, P Eerola, Christian W. Bauer, F Takahashi, Oleg Zenin, A. de Gouvea, C. Grojean, O Buchmuller, Masaharu Tanabashi, P. de Jong, J. Erler, R Sekhar Chivukula, M Taševský, S.I. Eidelman, C. W. Walter, D J Miller, A. Piepke, Torbjörn Sjöstrand, Y Sumino, Orin I. Dahl, Herbert K. Dreiner, A Soffer, Chi Lin, Bogdan A. Dobrescu, S. M. Spanier, R E Mitchell, Marcela Carena, Manuella Vincter, Otmar Biebel, M Karliner, V. S. Lugovsky, Ren-Yuan Zhu, J. J. Beatty, C. Patrignani, A Pomarol, U Thoma, Kurtis F Johnson, N Varelas, William J. Marciano, David Milstead, Sw. Banerjee, Michael Doser, P Urquijo, A. Gurtu, A Bettini, Aneesh V. Manohar, L. S. Littenberg, Michael Syphers, Burkert, M C Gonzalez-Garcia, Ron L. Workman, Jamie Holder, German Valencia, Subir Sarkar, M Kenzie, Charles G Wohl, W. Fetscher, J Hisano, W Vogelsang, Th. Gutsche, Zoltan Ligeti, Thibault Damour, K Rabbertz, Marumi Kado, Sharma, G. Cowan, Klaus Mönig, Fabio Maltoni, C. L. Woody, Anatoli Romaniouk, A. Stahl, Michal Kreps, J Ellis, W-M. Yao, B C Allanach, J Anderson, Ken Ichi Hikasa, Eberhard Klempt, Keith A. Olive, V I Belousov, David H. Weinberg, J.J. Hernández-Rey, Meenakshi Narain, Younghoon Kwon, Andreas Ringwald, M O Wascko, K Trabelsi, E. J. Weinberg, R Yoshida, Jonas Rademacker, D. M. Asner, R A Ryutin, Paolo Molaro, C Lourengo, Peter Skands, Vorobyev, Wolfgang Walkowiak, S. B. Lugovsky, B. K. Heltsley, K. S. Lugovsky, Uli Katz, Daniel Tovey, George F. Smoot, Stephen R. Sharpe, S Heinemeyer, Brian D. Fields, H Ramani, Y Gershtein, R S Thorne, Ofer Lahav, K M Black, T Mannel, Timothy Gershon, Yoshinari Hayato, P. Schaffner, E. Blucher, G. Venanzoni, T Skwarnicki, Giancarlo D'Ambrosio, A J Schwartz, D J Robinson, G Rybka, Joey Huston, M S Sozzi, L.J. Rosenberg, L P Lellouch, Sophia L. Stone, U G Meißner, L. R. Wiencke, L Verde, S. Rolli, G. Dissertori, Augusto Ceccucci, S. T. Petcov, Matthias Neubert, Koji Nakamura, J. Beringer, E Pianori, W Zheng, G Zanderighi, Paul William Richardson, Daniel de Florian, Maksym Titov, C Lippmann, K Terashi, Y. Sakai, A Höcker, Ezhela, L. Tiator, Manuel Drees, A Pich, S Profumo, Gavin P. Salam, R. M. Barnett, J Schwiening, E C Aschenauer, Howard Baer, O. Schneider, Tony Gherghetta, P A Zyla, Jack Laiho, T Hyodo, Jonathan L. Rosner, B. Krusche, H J Gerber, Kate Scholberg, Stefan Roesler, Shoji Hashimoto, D Wands, G Aielli, A Holtkamp, Andrei Gritsan, Arnulf Quadt, A Freitas, Alessandro Cerri, U Egede, H. R. Gallagher, G. Gerbier, V A Khoze, S. R. Klein, B. N. Ratcliff, Y Makida, S. P. Wakely, Christoph Grab, Alberto Masoni, M Mikhasenko, Tony Liss, R. N. Cahn, A A Godizov, Paolo Nason, P. Nevski, T. Sumiyoshi, M D'Onofrio, A Lusiani, B. Foster, Thomas DeGrand, N. P. Tkachenko, Martin White, Douglas Scott, M Yokoyama, G P Zeller, M Ryskin, Petr Vogel, Christian Spiering, M A Bychkov, L. Garren, R. Kowalewski, John Terning, Claude Amsler, John Matthews, Y. Nir, A Hebecker, Mario Antonelli, M Ramsey-Musolf, Andreas Vogt, S L Zhu, Andrew R. Liddle, L Baudis, Debadi Chakraborty, Kaustubh Agashe, J Tanaka, S. Sánchez Navas, Howard E. Haber, Frank Krauss, M. C. Goodman, V A Petrov, Martin Grunewald, Fabio Sauli, D A Dwyer, R. G. Van de Water, M. Silari, John A. Peacock, S Willocq, T Shutt, Frank Zimmermann, Filip Moortgat, M Moskovic, Georg G. Raffelt, D. E. Groom, T. Basaglia, The George Washington University (GW), Thomas Jefferson National Accelerator Facility (Jefferson Lab), Florida State University [Tallahassee] (FSU), Helmholtz-Institut für Strahlen- und Kernphysik (HISKP), Rheinische Friedrich-Wilhelms-Universität Bonn, Institut für Kernphysik (IKP), Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, University of Maryland [Baltimore], Università degli Studi di Roma Tor Vergata [Roma], University of Cambridge [UK] (CAM), Austrian Academy of Sciences (OeAW), INFN Frascati, Istituto Nazionale di Fisica Nucleare (INFN), Brookhaven National Laboratory [Upton, NY] (BNL), UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY)-U.S. Department of Energy [Washington] (DOE), University of Oklahoma (OU), University of Louisville, Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Universität Zürich [Zürich] = University of Zurich (UZH), Ohio State University [Columbus] (OSU), National Research Centre Kurchatov Institute, Istituto Nazionale di Fisica Nucleare, Sezione di Padova (INFN, Sezione di Padova), Ludwig-Maximilians-Universität München (LMU), University of Wisconsin Oshkosh (UWO), University of Chicago, Imperial College London, University of Virginia, Fermi National Accelerator Laboratory (Fermilab), CERN [Genève], University of Sussex, University of California (UC), Royal Holloway [University of London] (RHUL), State University of New York (SUNY Canton), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN, Sezione di Napoli), Institut des Hautes Études Scientifiques (IHES), IHES, Universidad Nacional de San Martin (UNSAM), Northwestern University [Evanston], University of Colorado [Boulder], University of Amsterdam [Amsterdam] (UvA), Yale University [New Haven], University of Liverpool, Universitätsklinikum Bonn (UKB), TKK Helsinki University of Technology (TKK), Monash university, Budker Institute of Nuclear Physics (BINP), Siberian Branch of the Russian Academy of Sciences (SB RAS), University of Illinois [Chicago] (UIC), University of Illinois System, King‘s College London, Departement Physik [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), University of Pittsburgh (PITT), Pennsylvania Commonwealth System of Higher Education (PCSHE), Tufts University [Medford], Rutgers University [Camden], Rutgers University System (Rutgers), University of Minnesota System, Stony Brook University [SUNY] (SBU), State University of New York (SUNY), Argonne National Laboratory [Lemont] (ANL), Departement Erdwissenschaften [ETH Zürich] (D-ERDW), Johns Hopkins University (JHU), Deutsches Elektronen-Synchrotron [Hamburg] (DESY), University College Dublin [Dublin] (UCD), Department of Condensed Matter Physics and Materials Science [TIFR] (CMPMS), Tata Institute for Fundamental Research (TIFR), Universitätsklinikum Tübingen - University Hospital of Tübingen, Eberhard Karls Universität Tübingen = Eberhard Karls University of Tuebingen, Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Forschungszentrum Jülich GmbH, KEK (High energy accelerator research organization), The University of Tokyo (UTokyo), Heidelberg University, Universidad Autónoma de Madrid (UAM), Universitat de València (UV), Tohoku University [Sendai], University of Delaware [Newark], Michigan State University System, Tokyo Metropolitan University [Tokyo] (TMU), Gran Sasso Science Institute, INFN, Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Tel Aviv University (TAU), Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), University of Warwick [Coventry], Department of Physics [Durham University], Durham University, University of Ljubljana, University of Basel (Unibas), Yonsei University, University College of London [London] (UCL), Syracuse University, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), CPT - E1 Physique des particules, Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Rheinisch-Westfälische Technische Hochschule Aachen University (RWTH), Universidade de Lisboa, GSI Helmholtzzentrum für Schwerionenforschung (GSI), City College of New York [CUNY] (CCNY), City University of New York [New York] (CUNY), Scuola Normale Superiore di Pisa (SNS), Université Catholique de Louvain = Catholic University of Louvain (UCL), Universität Siegen [Siegen], Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (INFN, Sezione di Cagliari), Louisiana State University (LSU), University of Glasgow, Stockholms universitet, Indiana State University, INAF/OATS, Trieste, Italy, Department of Applied Physics, Ghent University, Brown University, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University (JGU), Weizmann Institute of Science [Rehovot, Israël], University of Bologna/Università di Bologna, University of Edinburgh, Institute of Molecular Genetics of National Research Centre «Kurchatov Institute» [Moscow, Russia], Russian Academy of Sciences [Moscow] (RAS), Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), University of Alabama [Tuscaloosa] (UA), Universitat Autònoma de Barcelona (UAB), Georg-August-University = Georg-August-Universität Göttingen, Karlsruhe Institute of Technology (KIT), University of Bristol [Bristol], Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) (MPI-P), Tsung-Dao Lee Institute, Shanghai Jiao Tong, SLAC National Accelerator Laboratory (SLAC), Stanford University, U.S. Department of Energy [Washington] (DOE), Leopold Franzens Universität Innsbruck - University of Innsbruck, The National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) [Moscow, Russia], University of Mary Washington, Petersburg Nuclear Physics Institute, University of Oxford, Ecole Polytechnique Fédérale de Lausanne (EPFL), Technische Universität München = Technical University of Munich (TUM), University of Cincinnati (UC), University of British Columbia (UBC), University of Washington [Seattle], Istituto Nazionale di Fisica Nucleare [Pisa] (INFN), Lund University [Lund], AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), University of Pisa - Università di Pisa, University of Tennessee System, Northern Illinois University, Nagoya University, Tokyo University of Science [Tokyo], Czech Academy of Sciences [Prague] (CAS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, University of Sheffield [Sheffield], University of Melbourne, Monash University [Melbourne], University of Barcelona, California Institute of Technology (CALTECH), Department of Radiology [Radiologische Universitätsklinik Eberhard-Karls-Universität Tübingen], University of Portsmouth, Columbia University [New York], Colorado School of Mines, University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS), Max Planck Institute for the Physics of Complex Systems (MPI-PKS), Max-Planck-Gesellschaft, Moscow Institute of Physics and Technology [Moscow] (MIPT), Peking University [Beijing], Institute of High Energy Physics [Beijing] (IHEP), Chinese Academy of Sciences [Changchun Branch] (CAS), Particle Data Group, Institut des Hautes Etudes Scientifiques (IHES), Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Département de Physique des Particules (ex SPP) (DPP), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), CEA/DSM, Département de Physique des Particules (ex SPP) (DPhP), UCL - SST/IRMP - Institut de recherche en mathématique et physique, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), ITA, Department of Energy (US), Japan Society for the Promotion of Science, European Commission, Ministry of Education, Culture, Sports, Science and Technology (Japan), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Science and Technology Facilities Council (STFC), Tanabashi, M, Grp, P, Hagiwara, K, Hikasa, K, Nakamura, K, Sumino, Y, Takahashi, F, Tanaka, J, Agashe, K, Aielli, G, Amsler, C, Antonelli, M, Asner, D, Baer, H, Banerjee, S, Barnett, R, Basaglia, T, Bauer, C, Beatty, J, Belousov, V, Beringer, J, Bethke, S, Bettini, A, Bichsel, H, Biebel, O, Black, K, Blucher, E, Buchmuller, O, Burkert, V, Bychkov, M, Cahn, R, Carena, M, Ceccucci, A, Cerri, A, Chakraborty, D, Chen, M, Chivukula, R, Cowan, G, Dahl, O, D'Ambrosio, G, Damour, T, de Florian, D, de Gouvea, A, Degrand, T, de Jong, P, Dissertori, G, Dobrescu, B, D'Onofrio, M, Doser, M, Drees, M, Dreiner, H, Dwyer, D, Eerola, P, Eidelman, S, Ellis, J, Erler, J, Ezhela, V, Fetscher, W, Fields, B, Firestone, R, Foster, B, Freitas, A, Gallagher, H, Garren, L, Gerber, H, Gerbier, G, Gershon, T, Gershtein, Y, Gherghetta, T, Godizov, A, Goodman, M, Grab, C, Gritsan, A, Grojean, C, Groom, D, Grunewald, M, Gurtu, A, Gutsche, T, Haber, H, Hanhart, C, Hashimoto, S, Hayato, Y, Hayes, K, Hebecker, A, Heinemeyer, S, Heltsley, B, Hernandez-Rey, J, Hisano, J, Hocker, A, Holder, J, Holtkamp, A, Hyodo, T, Irwin, K, Johnson, K, Kado, M, Karliner, M, Katz, U, Klein, S, Klempt, E, Kowalewski, R, Krauss, F, Kreps, M, Krusche, B, Kuyanov, Y, Kwon, Y, Lahav, O, Laiho, J, Lesgourgues, J, Liddle, A, Ligeti, Z, Lin, C, Lippmann, C, Liss, T, Littenberg, L, Lugovsky, K, Lugovsky, S, Lusiani, A, Makida, Y, Maltoni, F, Mannel, T, Manohar, A, Marciano, W, Martin, A, Masoni, A, Matthews, J, Meissner, U, Milstead, D, Mitche, R, Moenig, K, Molaro, P, Moortgat, F, Moskovic, M, Murayama, H, Narain, M, Nason, P, Navas, S, Neubert, M, Nevski, P, Nir, Y, Olive, K, Griso, S, Parsons, J, Patrignani, C, Peacock, J, Pennington, M, Petcov, S, Petrov, V, Pianori, E, Piepke, A, Pomarol, A, Quadt, A, Rademacker, J, Raffelt, G, Ratcliff, B, Richardson, P, Ringwald, A, Roesler, S, Rolli, S, Romaniouk, A, Rosenberg, L, Rosner, J, Rybka, G, Ryutin, R, Sachrajda, C, Sakai, Y, Salam, G, Sarkar, S, Sauli, F, Schneider, O, Scholberg, K, Schwartz, A, Scott, D, Sharma, V, Sharpe, S, Shutt, T, Silari, M, Sjostrand, T, Skands, P, Skwarnicki, T, Smith, J, Smoot, G, Spanier, S, Spieler, H, Spiering, C, Stah, A, Stone, S, Sumiyoshi, T, Syphers, M, Terashi, K, Terning, J, Thoma, U, Thorne, R, Tiator, L, Titov, M, Tkachenko, N, Tornqvist, N, Tovey, D, Valencia, G, Van de Water, R, Varelas, N, Venanzoni, G, Verde, L, Vincter, M, Voge, P, Vogt, A, Wakely, S, Walkowiak, W, Walter, C, Wands, D, Ward, D, Wascko, M, Weiglein, G, Weinberg, D, Weinberg, E, White, M, Wiencke, L, Willocq, S, Woh, C, Womersley, J, Woody, C, Workman, R, Yao, W, Zeller, G, Zenin, O, Zhu, R, Zhu, S, Zimmermann, F, Zyla, P, Anderson, J, Fuller, L, Lugovsky, V, Schaffner, P, Tanabashi, M., Grp, Particle Data, Hagiwara, K., Hikasa, K., Nakamura, K., Sumino, Y., Takahashi, F., Tanaka, J., Agashe, K., Aielli, G., Amsler, C., Antonelli, M., Asner, D. M., Baer, H., Banerjee, Sw., Barnett, R. M., Basaglia, T., Bauer, C. W., Beatty, J. J., Belousov, V. I., Beringer, J., Bethke, S., Bettini, A., Bichsel, H., Biebel, O., Black, K. M., Blucher, E., Buchmuller, O., Burkert, V., Bychkov, M. A., Cahn, R. N., Carena, M., Ceccucci, A., Cerri, A., Chakraborty, D., Chen, M. -C., Chivukula, R. S., Cowan, G., Dahl, O., D'Ambrosio, G., Damour, T., de Florian, D., de Gouvea, A., Degrand, T., de Jong, P., Dissertori, G., Dobrescu, B. A., D'Onofrio, M., Doser, M., Drees, M., Dreiner, H. K., Dwyer, D. A., Eerola, P., Eidelman, S., Ellis, J., Erler, J., Ezhela, V. V., Fetscher, W., Fields, B. D., Firestone, R., Foster, B., Freitas, A., Gallagher, H., Garren, L., Gerber, H. -J., Gerbier, G., Gershon, T., Gershtein, Y., Gherghetta, T., Godizov, A. A., Goodman, M., Grab, C., Gritsan, A. V., Grojean, C., Groom, D. E., Grunewald, M., Gurtu, A., Gutsche, T., Haber, H. E., Hanhart, C., Hashimoto, S., Hayato, Y., Hayes, K. G., Hebecker, A., Heinemeyer, S., Heltsley, B., Hernandez-Rey, J. J., Hisano, J., Hocker, A., Holder, J., Holtkamp, A., Hyodo, T., Irwin, K. D., Johnson, K. F., Kado, M., Karliner, M., Katz, U. F., Klein, S. R., Klempt, E., Kowalewski, R. V., Krauss, F., Kreps, M., Krusche, B., Kuyanov, Yu. V., Kwon, Y., Lahav, O., Laiho, J., Lesgourgues, J., Liddle, A., Ligeti, Z., Lin, C. -J., Lippmann, C., Liss, T. M., Littenberg, L., Lugovsky, K. S., Lugovsky, S. B., Lusiani, A., Makida, Y., Maltoni, F., Mannel, T., Manohar, A. V., Marciano, W. J., Martin, A. D., Masoni, A., Matthews, J., Meissner, U. -G., Milstead, D., Mitche, R. E., Moenig, K., Molaro, P., Moortgat, F., Moskovic, M., Murayama, H., Narain, M., Nason, P., Navas, S., Neubert, M., Nevski, P., Nir, Y., Olive, K. A., Griso, S. Pagan, Parsons, J., Patrignani, C., Peacock, J. A., Pennington, M., Petcov, S. T., Petrov, V. A., Pianori, E., Piepke, A., Pomarol, A., Quadt, A., Rademacker, J., Raffelt, G., Ratcliff, B. N., Richardson, P., Ringwald, A., Roesler, S., Rolli, S., Romaniouk, A., Rosenberg, L. J., Rosner, J. L., Rybka, G., Ryutin, R. A., Sachrajda, C. T., Sakai, Y., Salam, G. P., Sarkar, S., Sauli, F., Schneider, O., Scholberg, K., Schwartz, A. J., Scott, D., Sharma, V., Sharpe, S. R., Shutt, T., Silari, M., Sjostrand, T., Skands, P., Skwarnicki, T., Smith, J. G., Smoot, G. F., Spanier, S., Spieler, H., Spiering, C., Stah, A., Stone, S. L., Sumiyoshi, T., Syphers, M. J., Terashi, K., Terning, J., Thoma, U., Thorne, R. S., Tiator, L., Titov, M., Tkachenko, N. P., Tornqvist, N. A., Tovey, D. R., Valencia, G., Van de Water, R., Varelas, N., Venanzoni, G., Verde, L., Vincter, M. G., Voge, P., Vogt, A., Wakely, S. P., Walkowiak, W., Walter, C. W., Wands, D., Ward, D. R., Wascko, M. O., Weiglein, G., Weinberg, D. H., Weinberg, E. J., White, M., Wiencke, L. R., Willocq, S., Woh, C. C., Womersley, J., Woody, C. L., Workman, R. L., Yao, W. -M., Zeller, G. P., Zenin, O. V., Zhu, R. -Y., Zhu, S. -L., Zimmermann, F., Zyla, P. A., Anderson, J., Fuller, L., Lugovsky, V. S., Schaffner, P., Robinson, D. J., Wohl, C. G., Allanach, B. C., Aschenauer, E. C., Baudis, L., Sekhar Chivukula, R., Egede, U., Gonzalez-Garcia, M. C., Huston, J., Kenzie, M., Khoze, V. A., Lellouch, L. P., Liddle, A. R., Lourenco, C., Mikhasenko, M., Miller, D. J., Mitchell, R. E., Monig, K., Pich, A., Profumo, S., Rabbertz, K., Ramani, H., Ramsey-Musolf, M., Ryskin, M., Schwiening, J., Soffer, A., Sozzi, M. S., Stahl, A., Tasevsky, M., Trabelsi, K., Urquijo, P., van de Water, R., Vogel, P., Vogelsang, W., Vorobyev, V., Yokoyama, M., Yoshida, R., Zanderighi, G., Zheng, W., and Department of Physics
Subjects: high energy, lepton, mixing [neutrino], High Energy Physics::Lattice, Cosmic microwave background, diffraction, Technicolor, Astrophysics, Omega, 01 natural sciences, Physics, Particles & Fields, higgs-boson production, Big Bang nucleosynthesis, cosmological model: parameter space, tau, dark energy, Monte Carlo, fields, pentaquark, instrumentation, Settore FIS/01, gauge boson, Anomalous magnetic dipole moment, deep-inelastic scattering, new physics, Physics, DOUBLE-BETA-DECAY, Electroweak interaction, density [dark matter], HEAVY FLAVOUR, Quarkonium, review, particle, physics, SUPERSYMMETRIC STANDARD MODEL, square-root-s, Physics, Nuclear, grand unified theory, boson: heavy, statistics, Physical Sciences, Higgs boson, axion: mass, flavor: violation, Neutrino, ELECTROWEAK SYMMETRY-BREAKING, numerical calculations: Monte Carlo, on-line, S013EPH, Quark, heavy [boson], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Physics, Multidisciplinary, anomalous magnetic-moment, electroweak radiative-corrections, dark matter: density, Higgs particle, meson, neutrino masses, neutrino mixing, neutrino oscillations, 114 Physical sciences, CHIRAL PERTURBATION-THEORY, neutrino mixing, Standard Model, quark, 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics, Nucleosynthesis, quantum chromodynamics, CP: violation, Dark matter, ddc:530, particle physics, Strong Interactions, 010306 general physics, sparticle, S013DF, grand unified theories, PRODUCTION, Gauge boson, Science & Technology, neutrino masses, 010308 nuclear & particles physics, C50 Other topics in experimental particle physics, Particle Data Group, Astronomy and Astrophysics, Deep inelastic scattering, to-leading-order, Automatic Keywords, heavy boson, axion, tables (particle physics), Tetraquark, proton-proton collisions, Supersymmetry, hadron, neutrino: mixing, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], cosmology, Volume (compression), HIGGS-BOSON, UB-VERTICAL-BAR, cosmological model, dark energy density, experimental methods, ddc:539.72021, Physics beyond the Standard Model, standard model, group theory, General Physics and Astronomy, tables, particle physics, high energy physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Quantum chromodynamics, energy: high, E Rev 2016, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], Settore FIS/01 - Fisica Sperimentale, photon, Nuclear & Particles Physics, parameter space [cosmological model], dark energy: density, high [energy], M013WX, fermion-pair production, Nuclear and High Energy Physics, Particle physics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, dark matter, statistical analysis, Double beta decay, 0103 physical sciences, conservation law, cold dark-matter, TAU LEPTONS, Astrophysics::Galaxy Astrophysics, tables, DEEP-INELASTIC-SCATTERING, electroweak interaction, High Energy Physics::Phenomenology, 750 GeV diphoton excess, PRODUCTION CROSS-SECTION, baryon, density [dark energy], Physics and Astronomy, gravitation, CKM matrix, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, supersymmetry, Minimal Supersymmetric Standard Model
Abstract: The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app., United States Department of Energy (DOE) DE-AC02-05CH11231, government of Japan (Ministry of Education, Culture, Sports, Science and Technology), Istituto Nazionale di Fisica Nucleare (INFN), Physical Society of Japan (JPS), European Laboratory for Particle Physics (CERN), United States Department of Energy (DOE)
Published: 2018
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23. Uncertainties in the lightest $$CP$$ <math><mrow><mi>CP</mi></mrow></math> even Higgs boson mass prediction in the minimal supersymmetric standard model: fixed order versus effective field theory prediction

Author: B. C. Allanach and A. Voigt
Subjects: High Energy Physics::Lattice, lcsh:QB460-466, High Energy Physics::Phenomenology, lcsh:QC770-798, lcsh:Astrophysics, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, High Energy Physics::Experiment
Abstract: We quantify and examine the uncertainties in predictions of the lightest $$CP$$ CP even Higgs boson pole mass $$M_h$$ Mh in the Minimal Supersymmetric Standard Model ($${\text {MSSM}}$$ MSSM ), utilising current spectrum generators and including some three-loop corrections. There are two broadly different approximations being used: effective field theory (EFT) where an effective Standard Model ($$\text {SM}$$ SM ) is used below a supersymmetric mass scale, and a fixed order calculation, where the $${\text {MSSM}}$$ MSSM is matched to $$\text {QCD}\times \text {QED}$$ QCD×QED at the electroweak scale. The uncertainties on the $$M_h$$ Mh prediction in each approach are broken down into logarithmic and finite pieces. The inferred values of the stop mass parameters are sensitively dependent upon the precision of the prediction for $$M_h$$ Mh . The fixed order calculation appears to be more accurate below a supersymmetry (SUSY) mass scale of $$M_S\approx 1.2~\text {TeV}$$ MS≈1.2TeV , whereas above this scale, the EFT calculation is more accurate. We also revisit the range of the lightest stop mass across fine-tuned parameter space that has an appropriate stable vacuum and is compatible with the lightest $$CP$$ CP even Higgs boson h being identified with the one discovered at the ATLAS and CMS experiments in 2012; we achieve a maximum value of $$\sim 10^{11}$$ ∼1011 GeV.
Published: 2018

24. Les Houches 2011: Physics at TeV Colliders New Phys

Author: G. Brooijmans, B. Gripaios, F. Moortgat, J. Santiago, P. Skands, D. Albornoz Vásquez, B. C. Allanach, A. Alloul, A. Arbey, A. Azatov, H. Baer, C. Balázs, A. Barr, L. Basso, M. Battaglia, P. Bechtle, G. Bélanger, A. Belyaev, K. Benslama, L. Bergström, A. Bharucha, C. Boehm, M. Bondarenko, O. Bondu, E. Boos, F. Boudjema, T. Bringmann, M. Brown, V. Bunichev, S. Calvet, M. Campanelli, A. Carmona, D. G. Cerdeño, M. Chala, R. S. Chivukula, D. Chowdhury, N. D. Christensen, M. Cirelli, S. Cox, K. Cranmer, J. Da Silva, T. Delahaye, A. De Roeck, A. Djouadi, E. Dobson, M. Dolan, F. Donato, G. Drieu La Rochelle, G. Duda, C. Duhr, B. Dumont, J. Edsjö, J. Ellis, C. Evoli, A. Falkowski, M. Felcini, B. Fuks, D. Gaggero, S. Gascon Shotkin, D. K. Ghosh, A. Giammanco, E. Gabrielli, GABRIELLI, Emidio, G. Brooijmans, et. al., G., Brooijman, B., Gripaio, F., Moortgat, J., Santiago, P., Skand, D., Albornoz Vásquez, B. C., Allanach, A., Alloul, A., Arbey, A., Azatov, H., Baer, C., Baláz, A., Barr, L., Basso, M., Battaglia, P., Bechtle, G., Bélanger, A., Belyaev, K., Benslama, L., Bergström, A., Bharucha, C., Boehm, M., Bondarenko, O., Bondu, E., Boo, F., Boudjema, T., Bringmann, M., Brown, V., Bunichev, S., Calvet, M., Campanelli, A., Carmona, D. G., Cerdeño, M., Chala, R. S., Chivukula, D., Chowdhury, N. D., Christensen, M., Cirelli, S., Cox, K., Cranmer, J., Da Silva, T., Delahaye, A., De Roeck, A., Djouadi, E., Dobson, M., Dolan, F., Donato, G., Drieu La Rochelle, G., Duda, C., Duhr, B., Dumont, J., Edsjö, J., Elli, C., Evoli, A., Falkowski, M., Felcini, B., Fuk, Gabrielli, Emidio, D., Gaggero, S., Gascon Shotkin, D. K., Ghosh, A., Giammanco, and E., Gabrielli
Subjects: LARGE HADRON COLLIDER
Abstract: We present the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 30 May-17 June, 2011). Our report includes new agreements on formats for interfaces between computational tools, new tool developments, important signatures for searches at the LHC, recommendations for presentation of LHC search results, as well as additional phenomenological studies.
Published: 2012

25. Measuring supersymmetry at the large hadron collider

Author: B. C. Allanach
Subjects: Physics, Particle physics, Large Hadron Collider, Supergravity, High Energy Physics::Phenomenology, General Physics and Astronomy, Hierarchy problem, Supersymmetry, Supersymmetry breaking, High Energy Physics::Theory, High Energy Physics::Experiment, Anomaly (physics), Lepton, Minimal Supersymmetric Standard Model
Abstract: The large hadron collider (LHC) should have the ability to detect supersymmetric particles if low-energy supersymmetry solves the hierarchy problem. Studies of the LHC detection reach, and the ability to measure properties of supersymmetric particles are currently underway. We highlight some of these, such as the reach in minimal supergravity space and correlation with a fine-tuning parameter, precision measurements of edge variables, anomaly or gauge-mediated supersymmetry breaking. Supersymmetry with baryon-number violation seems at first glance more difficult to detect, but proves to be possible by using leptons from cascade decays.
Published: 2003
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26. Working group report: Collider and B physics

Author: Amitava Datta, K. Sridhar, K. Abe, K. Agashe, R. Aleksan, B. C. Allanach, S. Chakraborti, D. Choudhury, Asesh Krishna Datta, Anindya Datta, D. Ghosh, R. M. Godbole, M. Guchait, K. Huitu, P. Konar, A. Kundu, S. Moretti, B. Mukhopadhyaya, and D. P. Roy
Subjects: Physics, Particle physics, Extra dimensions, Group (mathematics), law, health services administration, education, Higgs boson, General Physics and Astronomy, Supersymmetry, Collider, humanities, law.invention
Abstract: The activities of the working group including some of the seminars are summarized. The written reports received are included.
Published: 2003
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27. Collider aspects of flavour physics at high Q

Author: T. Lari, L. Pape, W. Porod, J. A. Aguilar-Saavedra, B. C. Allanach, G. Burdman, N. Castro, M. Klasen, N. Krasnikov, F. Krauss, F. Moortgat, G. Polesello, A. Tricomi, G. Ünel, F. del Aguila, J. Alwall, Y. Andreev, D. Aristizabal Sierra, A. Bartl, M. Beccaria, S. Béjar, L. Benucci, S. Bityukov, I. Borjanović, G. Bozzi, J. Carvalho, B. Clerbaux, F. de Campos, A. de Gouvêa, C. Dennis, A. Djouadi, O. J. P. Éboli, U. Ellwanger, D. Fassouliotis, P. M. Ferreira, R. Frederix, B. Fuks, J.-M. Gerard, A. Giammanco, S. Gninenko, S. Gopalakrishna, T. Goto, B. Grzadkowski, J. Guasch, T. Hahn, S. Heinemeyer, A. Hektor, M. Herquet, B. Herrmann, K. Hidaka, M. K. Hirsch, K. Hohenwarter-Sodek, W. Hollik, G. W. S. Hou, T. Hurth, A. Ibarra, J. Illana, M. Kadastik, S. Kalinin, C. Karafasoulis, M. Karagöz Ünel, T. Kernreiter, M. M. Kirsanov, E. Kou, C. Kourkoumelis, S. Kraml, A. Kyriakis, V. Lemaitre, G. Macorini, M. B. Magro, W. Majerotto, F. Maltoni, V. Matveev, R. Mehdiyev, M. Misiak, G. Moreau, M. Mühlleitner, M. Müntel, A. Onofre, E. Özcan, F. Palla, L. Panizzi, S. Peñaranda, R. Pittau, A. Pukhov, M. Raidal, A. R. Raklev, L. Rebane, F. M. Renard, D. Restrepo, Z. Roupas, R. Santos, S. Schumann, G. Servant, F. Siegert, P. Skands, P. Slavich, J. Solà, M. Spira, S. Sultansoy, A. Toropin, J. Tseng, J. W. F. Valle, F. Veloso, A. Ventura, G. Vermisoglou, C. Verzegnassi, A. Villanova del Moral, G. Weiglein, M. Yılmaz, (SLuc) Service d'oto-rhino-laryngologie, UCL - SC/PHYS - Département de physique, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Théorique et Astroparticules (LPTA), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Service de Physique Théorique (SPhT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), F., DEL AGUILA, J. A., AGUILAR SAAVEDRA, B. C., Allanach, J., Alwall, Andreev, Y. U., D., ARISTIZABAL SIERRA, A., Bartl, Beccaria, Matteo, S., Bejar, L., Benucci, S., Bityukov, I., Borjanovic, G., Bozzi, G., Burdman, J., Carvalho, N., Castro, B., Clerbaux, F., DE CAMPOS, A., DE GOUVEA, C., Denni, A., Djouadi, O. J. P., Eboli, U., Ellwanger, D., Fassoulioti, P. M., Ferreira, R., Frederix, B., Fuk, J. M., Gerard, A., Giammanco, S., Gopalakrishna, T., Goto, B., Grzadkowski, J., Guasch, T., Hahn, S., Heinemeyer, A., Hektor, M., Herquet, B., Herrmann, K., Hidaka, M. K., Hirsch, K., HOHENWARTER SODEK, W., Hollik, G. W. S., Hou, T., Hurth, A., Ibarra, J., Illana, M., Kadastik, S., Kalinin, C., Karafasouli, M., KARAGOZ UNEL, T., Kernreiter, M. M., Kirsanov, M., Klasen, E., Kou, C., Kourkoumeli, S., Kraml, N., Krasnikov, F., Krau, A., Kyriaki, V., Lemaitre, G., Macorini, M. B., Magro, W., Majerotto, F., Maltoni, R., Mehdiyev, M., Misiak, F., Moortgat, G., Moreau, M., Muhlleitner, M., Muntel, A., Onofre, E., Ozcan, F., Palla, L., Panizzi, L., Pape, S., Penaranda, R., Pittau, G., Polesello, A., Pukhov, M., Raidal, A. R., Raklev, L., Rebane, F. M., Renard, D., Restrepo, Z., Roupa, R., Santo, S., Schumann, G., Servant, F., Siegert, P., Skand, P., Slavich, J., Sola, M., Spira, S., Sultansoy, A., Toropin, A., Tricomi, J., Tseng, G., Unel, J. W. F., Valle, F., Veloso, Ventura, Andrea, G., Vermisoglou, C., Verzegnassi, A., VILLANOVA DEL MORAL, G., Weiglein, M., Yilmaz, Univ Milan, Ist Nazl Fis Nucl, Univ Granada, Univ Cambridge, Catholic Univ Louvain, RAS, Univ Valencia, Univ Vienna, Univ Salento, Univ Autonoma Barcelona, Univ Pisa, Univ Karlsruhe, Universidade de São Paulo (USP), Univ Coimbra, Univ Libre Brussels, Universidade Estadual Paulista (Unesp), Northwestern University (NU), Univ Oxford, Univ Paris 11, Univ Athens, Univ Lisbon, Univ Grenoble 1, KEK, Warsaw Univ, Univ Barcelona, Max Planck Inst Phys & Astrophys, CSIC UC, NICPB, Tokyo Gakugei Univ, Natl Taiwan Univ, CERN, Stanford Univ, DESY, NCSR Demokritos, INR, Univ Durham, Univ Trieste, Ctr Univ Fundação Santo Andre, Austrian Acad Sci, Univ Montreal, Azerbaijan Acad Sci, ETH, UCL, Univ Zaragoza, Univ Turin, Univ Wurzburg, SINP MSU, Univ Montpellier 2, Univ Antioquia, Tech Univ Dresden, CEA Saclay, Fermilab Natl Accelerator Lab, CNRS, Paul Scherrer Inst, TOBB Univ Econ & Technol, Univ Catania, Univ Calif Irvine, Gazi Univ, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Particle physics, Top quark, Physics and Astronomy (miscellaneous), High Energy Physics::Lattice, Flavour, FOS: Physical sciences, 01 natural sciences, law.invention, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), law, 0103 physical sciences, ddc:530, High Energy Physics, 010306 general physics, Collider, Hadrones, Engineering (miscellaneous), Flavour Physic, Particle Physics - Phenomenology, Physics, Large Hadron Collider, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Física, Little Higgs, Supersymmetry, Extra dimensions, High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Physique des particules élémentaires, Física de partículas, High Energy Physics::Experiment, LHC, Colisionadores
Abstract: This chapter of the 'Flavor in the era of LHC' workshop report discusses flavor-related issues in the production and decays of heavy states at the LHC at high momentum transfer Q, both from the experimental and the theoretical perspective. We review top quark physics, and discuss the flavor aspects of several extensions of the standard model, such as supersymmetry, little Higgs models or models with extra dimensions. This includes discovery aspects, as well as the measurement of several properties of these heavy states. We also present publicly available computational tools related to this topic. © Springer-Verlag / Società Italiana di Fisica 2008., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2008
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28. Yukawa textures in string unified models withSU(4)⊗O(4)symmetry

Author: B. C. Allanach, Smaragda Lola, Stephen F. King, and George K. Leontaris
Subjects: Physics, Nuclear and High Energy Physics, Standard Model (mathematical formulation), Particle physics, Gauge group, High Energy Physics::Phenomenology, Yukawa potential, Grand Unified Theory, Symmetry breaking, Gauge theory, Supersymmetry, Symmetry (physics), Mathematical physics
Abstract: We discuss the origin of Yukawa textures in the string-inspired and string-derived models based on the gauge group SU(4){circle_times}SU(2){sub L}{circle_times}SU(2){sub R} supplemented by a U(1){sub X} gauged family symmetry. The gauge symmetries are broken down to those of the minimal supersymmetric standard model which is the effective theory below 10{sup 16} GeV. The combination of the U(1){sub X} family symmetry and the Pati-Salam gauge group leads to a successful and predictive set of Yukawa textures involving two kinds of texture zeros: {ital horizontal} and {ital vertical} texture zeros. We discuss both symmetric and nonsymmetric textures in models of this kind, and in the second case perform a detailed numerical fit to the charged fermion mass and mixing data. Two of the Yukawa textures allow a low energy fit to the data with a total {chi}{sup 2} of 0.39 and 1.02, respectively, for three degrees of freedom. We also make a first attempt at deriving the nonrenormalizable operators required for the Yukawa textures from string theory. {copyright} {ital 1997} {ital The American Physical Society}
Published: 1997
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29. Explaining Tevatron leptons photons missing-E T events with supersymmetry

Author: B. C. Allanach
Subjects: Physics, Particle physics, Muon, Photon, High Energy Physics::Phenomenology, Tevatron, General Physics and Astronomy, Supersymmetry, Standard Model, Nuclear physics, High Energy Physics::Experiment, Gravitino, Energy (signal processing), Lepton
Abstract: The CDF experiment reported a lepton photon missing transverse energy (ie651_01)signal 3σ in excess of the standard model prediction in Tevatron Run I data. The excess can be explained by the resonant production of a smuon, which subsequently decays to a muon, a photon and a gravitino. Here, we perform combined fits of this model to the CDF (ie651_02) excess, the DO measurement of the same channel and the CDF (ie651_03) channel. Although the rates of the latter two analyses are in agreement with the standard model prediction, our model is in good agreement with these data because their signal to background efficiency is low at the best-fit point. However, they help to constrain the model away from the best fit point.
Published: 2004
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30. Quadruple Yukawa unification in the minimal supersymmetric standard model

Author: B. C. Allanach and S. F. King
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, MAJORANA, Unification, Right handed, Group (mathematics), Tau neutrino, High Energy Physics::Phenomenology, Yukawa potential, High Energy Physics::Experiment, Beta (velocity), Neutrino
Abstract: Predictions for m_t, tan beta, m_nu_tau are calculated for quadruple third family t-b-tau-nu_tau Yukawa unified models in the MSSM. The renormalisation group equations for the 3 families of the MSSM, including the right handed neutrino, are presented. For right handed tau neutrino Majorana masses that are bigger than 10^11 GeV, the tau neutrino mass is consistent with present cosmological bounds. The m_t, tan beta predictions are approximately equivalent to those in triple third family Yukawa unified models.
Published: 1995
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31. R-parity violating supersymmetric explanation for the largett¯forward-backward asymmetry

Author: B. C. Allanach and K. Sridhar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, media_common.quotation_subject, High Energy Physics::Phenomenology, Tevatron, Yukawa potential, Asymmetry, Standard Model, Nuclear physics, Pair production, R-parity, High Energy Physics::Experiment, media_common, Minimal Supersymmetric Standard Model
Abstract: We propose a supersymmetric explanation for the anomalously high forward backward asymmetry in top pair production measured by CDF and D0. We suppose that it is due to the t-channel exchange of a right-handed sbottom which couples to d_R and t_R, as is present in the R-parity violating minimal supersymmetric standard model. We show that all Tevatron and LHC experiments' t tbar constraints may be respected for a sbottom mass between 300 and 1200 GeV, and a large Yukawa coupling >2.2, yielding A_{FB} up to 0.18. The non Standard Model contribution to the LHC charge asymmetry parameter is Delta A_C^y=0.017-0.045, small enough to be consistent with current measurements but non-zero and positive, allowing for LHC confirmation in the future within 20 fb^-1. A small additional contribution to the LHC t tbar production cross-section is also predicted, allowing a further test. We estimate that 10 fb^-1 of LHC luminosity would be sufficient to rule out the proposal to 95% confidence level, if the measurements of the t tbar cross-section turn out to be centred on the Standard Model prediction.
Published: 2012
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32. Les Houches 2011: Physics at TeV Colliders New Physics Working Group Report

Author: G. Brooijmans, B. Gripaios, F. Moortgat, J. Santiago, P. Skands, D. Al- bornoz Vasquez, B. C. Allanach and A. Alloul et al.
Published: 2012

33. Discovery reach for generic supersymmetry at the LHC: M T2 versus missing transverse momentum selections for pMSSM searches

Author: Alan Barr, Alexandru Dafinca, B. C. Allanach, and Claire Gwenlan
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, FOS: Physical sciences, Sigma, Supersymmetry, Parameter space, Discoverability, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Transverse momentum, Standard model (cryptography), Minimal Supersymmetric Standard Model
Abstract: Different search strategies for supersymmetry have been employed by the LHC general-purpose experiments using early data. As proven by their early results, these strategies are promising, but raise the question of how well they will generalize for the future. We address this question by studying two thousand phenomenological minimal supersymmetric standard model parameter space points that come from a fit to indirect and cosmological data. We examine the 5 sigma discoverability of the points employing a typical ATLAS-type search based on missing transverse momentum (MET), a search based on an optimised MT2 cut and a combination of the two, taking into account standard model backgrounds. The discovery reach of the strategies can depend strongly on the systematic uncertainty in the background, subject to the stringency of the cuts and the details of the background simulation. By combining the MET and MT2 based strategies, with an integrated luminosity of 1 fb^-1 (10 fb^-1) at 7 TeV, 4-8% (42%) of the points are discoverable, depending on the systematic uncertainty on the background. At 14 TeV and with 10 fb^-1, 96% of the points are discoverable. While the majority of points can be discovered by both strategies at sqrt{s} = 14 TeV and with 1 fb^-1, there are some that are left undiscovered by a MET search strategy, but which are discovered by the MT2 strategy, and vice versa, therefore it is essential that one performs both in parallel. We discuss some of the factors that can make points more difficult to observe., 22 pages, 7 figures, 3 tables
Published: 2011
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34. Supersymmetric Monojets at the Large Hadron Collider

Author: Sebastian Grab, B. C. Allanach, and Howard E. Haber
Subjects: Coupling, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Particle physics, Nuclear and High Energy Physics, Large Hadron Collider, Dark matter, High Energy Physics::Phenomenology, FOS: Physical sciences, Jet (particle physics), Gauge (firearms), High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics::Theory, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Neutralino, Transverse momentum, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Supersymmetric monojets may be produced at the Large Hadron Collider by the process qg -> squark neutralino_1 -> q neutralino_1 neutralino_1, leading to a jet recoiling against missing transverse momentum. We discuss the feasibility and utility of the supersymmetric monojet signal. In particular, we examine the possible precision with which one can ascertain the neutralino_1-squark-quark coupling via the rate for monojet events. Such a coupling contains information on the composition of the neutralino_1 and helps bound dark matter direct detection cross-sections and the dark matter relic density of the neutralino_1. It also provides a check of the supersymmetric relation between gauge couplings and gaugino-quark-squark couplings., 46 pages, 10 figures. The appendix has been rewritten to correct an error that appears in all previous versions of the appendix. This error has no effect on the results in the main body of the paper
Published: 2010
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35. Flavour Violation in Anomaly Mediated Supersymmetry Breaking

Author: P. Slavich, B. C. Allanach, D.R.T. Jones, Gudrun Hiller, Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), ANR-07-BLAN-0245,ToolsDmColl,Tools for Dark Matter and the New Physics at the Colliders and in Astrophysics(2007), and European Project: 36252,HEPTOOLS
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Anomalous magnetic dipole moment, 010308 nuclear & particles physics, Branching fraction, Flavour, High Energy Physics::Phenomenology, FOS: Physical sciences, Supersymmetry, 01 natural sciences, Supersymmetry breaking, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, High Energy Physics::Experiment, Anomaly (physics), 010306 general physics, Particle Physics - Phenomenology, Minimal Supersymmetric Standard Model
Abstract: We study squark flavour violation in the anomaly mediated supersymmetry broken (AMSB) minimal supersymmetric standard model. Analytical expressions for the three-generational squark mass matrices are derived. We show that the anomaly-induced soft breaking terms have a decreasing amount of squark flavour violation when running from the GUT to the weak scale. Taking into account inter-generational squark mixing, we work out non-trivial constraints from B -> Xs gamma and Bs -> mu mu, which complement each other, as well as B -> tau nu decays. We further identify a region of parameter space where the anomalous magnetic moment of the muon and the B -> Xs gamma branching ratio are simultaneously accommodated. Since anomaly mediation is of the minimal flavour-violating type, the generic flavour predictions for this class of models apply, including a CKM-induced (and hence small) Bs-Bsbar-mixing phase., 32 pages, 8 figures. v2: minor clarifications, reference added, to appear in JHEP
Published: 2009
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36. LHC and B physics probes of neutrinoless double beta decay in supersymmetry without R-parity

Author: Heinrich Päs, C. H. Kom, B. C. Allanach, Allanach, Benjamin [0000-0003-4635-6830], and Apollo - University of Cambridge Repository
Subjects: Nuclear and High Energy Physics, Particle physics, Nuclear Theory, STANDARD MODEL, CONSERVATION, BOUNDS, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), R-parity, Double beta decay, BARYON, Physics, Large Hadron Collider, High Energy Physics::Phenomenology, SUSY, CONSTRAINTS, Supersymmetry, Lepton number, MAJORANA, High Energy Physics - Phenomenology, Supersymmetry Phenomenology, High Energy Physics::Experiment, Neutrino, VIOLATING COUPLINGS, Minimal Supersymmetric Standard Model
Abstract: In the event of an observation of neutrinoless double beta decay, a relevant question would be: what lepton number violating physics is responsible for the decay? The exchange of Majorana neutrinos and/or supersymmetric particles may contribute. We point out that measurements of supersymmetric signals at the LHC, including single slepton production, could be used to help bound some supersymmetric processes contributing to neutrinoless double beta decay. LHC information about the supersymmetric spectrum could be combined with Bd-Bd bar mixing data in order to bound a competing neutrinoless double beta decay process involving sbottom exchange., 23 pages, 14 figures, reference updated. Version 3 is significantly modified
Published: 2009

37. Collider aspects of flavor physics at high Q

Author: T. Lari, L. Pape, W. Porod, J. A. Aguilar-Saavedra, B. C. Allanach, G. Burdman, N. Castro, M. Klasen, N. Krasnikov, F. Krauss, F. Moortgat, G. Polesello, A. Tricomi, G. Ünel, F. del Aguila, J. Alwall, Y. Andreev, D. Aristizabal Sierra, A. Bartl, M. Beccaria, S. Béjar, L. Benucci, S. Bityukov, I. Borjanović, G. Bozzi, J. Carvalho, B. Clerbaux, F. de Campos, A. de Gouvêa, C. Dennis, A. Djouadi, O. J. P. Éboli, U. Ellwanger, D. Fassouliotis, P. M. Ferreira, R. Frederix, B. Fuks, J.-M. Gerard, A. Giammanco, S. Gninenko, S. Gopalakrishna, T. Goto, B. Grzadkowski, J. Guasch, T. Hahn, S. Heinemeyer, A. Hektor, M. Herquet, B. Herrmann, K. Hidaka, M. K. Hirsch, K. Hohenwarter-Sodek, W. Hollik, G. W. S. Hou, T. Hurth, A. Ibarra, J. Illana, M. Kadastik, S. Kalinin, C. Karafasoulis, M. Karagöz Ünel, T. Kernreiter, M. M. Kirsanov, E. Kou, C. Kourkoumelis, S. Kraml, A. Kyriakis, V. Lemaitre, G. Macorini, M. B. Magro, W. Majerotto, F. Maltoni, V. Matveev, R. Mehdiyev, M. Misiak, G. Moreau, M. Mühlleitner, M. Müntel, A. Onofre, E. Özcan, F. Palla, L. Panizzi, S. Peñaranda, R. Pittau, A. Pukhov, M. Raidal, A. R. Raklev, L. Rebane, F. M. Renard, D. Restrepo, Z. Roupas, R. Santos, S. Schumann, G. Servant, F. Siegert, P. Skands, P. Slavich, J. Solà, M. Spira, S. Sultansoy, A. Toropin, J. Tseng, J. W. F. Valle, F. Veloso, A. Ventura, G. Vermisoglou, C. Verzegnassi, A. Villanova del Moral, G. Weiglein, and M. Yılmaz
Subjects: 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published: 2009
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38. Panglossian Prospects for Detecting Neutralino Dark Matter in Light of Natural Priors

Author: Dan Hooper and B. C. Allanach
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Dark matter, Astrophysics (astro-ph), High Energy Physics::Phenomenology, FOS: Physical sciences, Parameter space, Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Prior probability, Neutralino, Higgs boson, High Energy Physics::Experiment, Higgsino, Neutrino, Minimal Supersymmetric Standard Model
Abstract: In most global fits of the constrained minimal supersymmetric model (CMSSM) to indirect data, the a priori likelihoods of any two points in tan beta are treated as equal, and the more fundamental mu and B Higgs potential parameters are fixed by potential minimization conditions. We find that, if instead a flat ("natural")prior measure on mu and B is placed, a strong preference exists for the focus point region from fits to particle physics and cosmological data. In particular, we find that the lightest neutralino is strongly favored to be a mixed bino-higgsino (~10% higgsino). Such mixed neutralinos have large elastic scattering cross sections with nuclei, leading to extremely promising prospects for both underground direct detection experiments and neutrino telescopes. In particular, the majority of the posterior probability distribution falls within parameter space within an order of magnitude of current direct detection constraints. Furthermore, neutralino annihilations in the sun are predicted to generate thousands of neutrino induced muon events per years at IceCube. Thus, assuming the framework of the CMSSM and using the natural prior measure, modulo caveats regarding astrophysical uncertainties, we are likely to be living in a world with good prospects for the direct and indirect detection of neutralino dark matter., 25 pages, 9 figures
Published: 2008

39. SUSY Predictions and SUSY Tools at the LHC

Author: B. C. Allanach
Subjects: Physics, Particle physics, Large Hadron Collider, Physics and Astronomy (miscellaneous), Supergravity, Monte Carlo method, Electroweak interaction, Dark matter, Astrophysics (astro-ph), High Energy Physics::Phenomenology, FOS: Physical sciences, Observable, Elementary particle, Supersymmetry, Astrophysics, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Engineering (miscellaneous)
Abstract: We provide a bestiary of public codes and other algorithmic tools that can be used for analysing supersymmetric phenomenology. We also describe the organisation of the different tools and communication between them. Tools exist that calculate supersymmetric spectra and decay widths, simulate Monte Carlo events as well as those that make predictions of dark matter relic density or that predict precision electroweak or b-observables. Some global fitting tools for use in SUSY phenomenology are also presented. In each case, a description and a link to the relevant web-site is provided. It is hoped that this review could serve as an "entry-gate" and map for prospective users., 29 pages, 9 figures. If this review omits or inaccurately describes your publicly available, supported, documented phenomenological SUSY tool on the date of arXival, please contact the author with the details. The review will be corrected taking your comments into account
Published: 2008

40. Global Fits of the Large Volume String Scenario to WMAP5 and Other Indirect Constraints Using Markov Chain Monte Carlo

Author: Matthew J. Dolan, A. M. Weber, and B. C. Allanach
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Anomalous magnetic dipole moment, Dark matter, Electroweak interaction, High Energy Physics::Phenomenology, FOS: Physical sciences, Markov chain Monte Carlo, Supersymmetry, String (physics), symbols.namesake, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Frequentist inference, Higgs boson, symbols
Abstract: We present global fits to the Large Volume Scenario (LVS) of string models using current indirect data. We use WMAP5 constraints on dark matter relic density, b-physics and electroweak observables as well as direct search constraints. Such data can be adequately fit by LVS, with the best-fit point for mu>0 having chi^2=13.6 for 8 degrees of freedom. The resulting constraints on parameter space are robust in that they do not depend much upon the prior, or upon whether one uses Bayesian or frequentist interpretations of the data. Sparticle masses are constrained to be well below the 1 TeV level, predicting early SUSY discovery at the LHC. We devise a method of quantifying which are the most important constraints. We find that the LEP2 Higgs mass constraint, the relic density of dark matter and the anomalous magnetic moment of the muon affect the fits to the strongest degree., 30 pages, 10 figures
Published: 2008
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41. Report of the 'Beyond the Standard Model' working group of the 1999 UK Phenomenology Workshop on Collider Physics (Durham)

Author: Holt, D., B. C. Allanach, J. J. van der Bij, A. Dedes, A. Djouadi, J. Grosse-Knetter, J. Hetherington, and S. Heinemeyer
Abstract: The `Beyond the Standard Model' working group discussed a variety of topics relating to exotic searches at current and future colliders, and the phenomenology of current models beyond the standard model (SM). For example, various supersymmetric (SUSY) and extra dimensions search possibilities and constraints are presented. Fine-tuning implications of SUSY searches are derived. The implications of Higgs (non)discovery are discussed, as well as the program HDECAY. The individual contributions are included separately. Much of the enclosed work is original, although some is reviewed. Journal of Physics G: Nuclear and Particle Physics
Published: 2000

42. Atmospheric neutrino oscillations and maximal nu_mu-nu_tau mixing in unified models

Author: B. C. Allanach
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Degenerate energy levels, High Energy Physics::Phenomenology, FOS: Physical sciences, String (physics), Symmetry (physics), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Super-Kamiokande, Mixing (physics), Eigenvalues and eigenvectors
Abstract: The recent data describing the evidence for neutrino oscillations by Super Kamiokande implies that two neutrinos are very strongly mixed. We ask the question: can approximate maximal neutrino mixing be natural in unified (GUT or string) models? We attempt to answer this question in as much generality as possible. Without specifying a particular model, we are able to show that a gauged family symmetry can naturally provide the required maximal mixing between mu and tau neutrinos. The second and third family neutrino mass eigenstates are almost degenerate with masses of order 0.2 eV., Comment: 11 pages LaTeX. 1 eps figure included; minor changes
Published: 1998
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43. Hybrid MSW + VO Solution of the Solar Neutrino Problem in String-Motivated Unified Theories

Author: George K. Leontaris, B. C. Allanach, and S.T. Petcov
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Oscillation, High Energy Physics::Phenomenology, FOS: Physical sciences, Fermion, Solar neutrino problem, String (physics), Symmetry (physics), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Experiment, Neutrino, Mixing (physics), Particle Physics - Phenomenology
Abstract: It is shown that the hybrid MSW + VO solution of the solar neutrino problem, according to which the solar nu_e undergo matter-enhanced transitions into nu_mu, nu_tau in the Sun followed by long wave length (about 1.5 10^8 km) nu_e -> nu_mu, nu_tau oscillations in vacuum between the Sun and the Earth, can occur naturally in string-motivated grand unified theories. We consider the supersymmetric version of a string-type SU(4)xSU(2)_LxSU(2)_R theory with U(1)_X family symmetry, which was shown to successfully describe the charged fermion masses and the quark mixing, and extend the earlier fermion mass analysis to the neutrino sector. We show that the four oscillation parameters Delta m_31^2, Delta m_21^2 and sin^2 2 theta_12, sin^2 2 theta_13, characterising the combined matter-enhanced transitions and vacuum oscillations of the solar nu_e, naturally get values in the ranges of the hybrid MSW + VO solutions found recently., 16 pages LaTeX, 3 figures. Uses epsfig macro. Replaced version has minor modification to fig 1a
Published: 1997

44. Single Sneutrino/Slepton Production at LEP2 and the NLC

Author: P. Morawitz, M.D. Williams, B. C. Allanach, and Herbi K. Dreiner
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Operator (physics), High Energy Physics::Phenomenology, FOS: Physical sciences, Supersymmetry, Coupling (probability), Luminosity, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Production (computer science), High Energy Physics::Experiment, Sensitivity (control systems)
Abstract: We propose a new method of detecting supersymmetry at LEP2 when R-parity is violated by an LLE operator. We consider the processes $e\gamma\ra\snu_j e_k$ and $e\gamma \ra \slep_k \bar{\nu}_j$. These are sensitive to seven of the nine LLE-operators. A Monte-Carlo analysis is performed to investigate the sensitivity to the sneutrino signal, and the 5$\sigma$ discovery contours in the mass vs. coupling plane are presented. For an integrated luminosity of 100 pb^-1, sneutrinos with masses up to 170 GeV/c^2 could be discovered in the near future at LEP2. For the charged slepton production the cross-section is too low to be detectable., Comment: 10 pages, LaTeX and 5 encapsulated postscript figures. Requires axodraw macro
Published: 1997

45. Yukawa textures from family symmetry and unification

Author: B. C. Allanach, Smaragda Lola, George K. Leontaris, and Steve F. King
Subjects: Physics, Nuclear and High Energy Physics, fermion masses, supersymmetric su(4)circle-times-su(2)(l)circle-times-su(2)(r) model, Texture (cosmology), High Energy Physics::Lattice, Yukawa potential, FOS: Physical sciences, Context (language use), Fermion, ansatz, Symmetry (physics), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Gauge group, mixing angles, matrices, Homogeneous space, Mathematical physics, Gauge symmetry, Particle Physics - Phenomenology
Abstract: In this letter, we show how the combination of both a gauged U(1)_X family symmetry and an extended vertical gauge symmetry in a single model, allows for the presence of additional Clebsch texture zeroes in the fermion mass matrices. This leads to new structures for the textures, with increased predictivity, as compared to schemes with enhanced family symmetries only. We illustrate these ideas in the context of the Pati-Salam gauge group SU(4)xSU(2)_LxSU(2)_R$ supplemented by a U(1)_X gauged family symmetry. In the case of symmetric mass matrices, two of the solutions of Ramond, Roberts and Ross that may not be obtained by family symmetries only, are accurately reproduced. For non-symmetric textures, new structures arise in models of this type. To distinguish between the solutions in this latter case, we performed a numerical fit to the charged fermion mass and mixing data. The best solution we found allows a fit with a total chi^2 of 0.39, for three degrees of freedom., Comment: 10 pages LaTeX. 1 figure included
Published: 1997

46. Infra-Red Stable Fixed Points of Yukawa Couplings in Supersymmetric Models

Author: Stephen F. King and B. C. Allanach
Subjects: Physics, Large class, Nuclear and High Energy Physics, Top quark, Particle physics, Infrared, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, Fixed point, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Saddle point, Minimal Supersymmetric Standard Model
Abstract: We provide the solutions of the fixed point conditions of the Yukawa sector for a large class of N=1 supersymmetric theories including the minimal and next-to-minimal supersymmetric standard models and their grand unified and other extensions. We also introduce a test which can discriminate between infra-red stable, infra-red unstable and saddle point solutions, and illustrate our methods with the example of the next-to-minimal supersymmetric standard model. We show that in this case, the fixed point prediction of the top quark mass is equivalent to that of the minimal supersymmetric standard model, supporting previous numerical analyses., Comment: 12 pages plain LaTeX
Published: 1997
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47. Infra-red fixed point structure characterising SUSY SU(5) symmetry breaking

Author: Owe Philipsen, Giovanni Amelino-Camelia, and B. C. Allanach
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Infrared, High Energy Physics::Lattice, High Energy Physics::Phenomenology, FOS: Physical sciences, Supersymmetry, Fixed point, Invariant (physics), Parameter space, High Energy Physics - Phenomenology, Theoretical physics, High Energy Physics - Phenomenology (hep-ph), Higgs boson, Symmetry breaking
Abstract: We analyze the one-loop renormalisation group equations for the parameters of the Higgs potential of a supersymmetric SU(5) model with first step of symmetry breaking involving an adjoint Higgs. In particular, we investigate the running of the parameters that decide the first step of symmetry breaking in an attempt to establish which symmetry-breaking scenarios would be most likely if the model is the effective low-energy description of some more fundamental theory. An infra-red fixed point is identified analytically. We show that it is located at the boundary between the region of Higgs parameter space corresponding to unbroken SU(5) and the region corresponding to the breaking of SU(5) to the Standard Model, and we elaborate on its implications. We also observe that certain forms of the Higgs potential discussed at tree level in the literature are not renormalisation group invariant., Comment: 10 pages LaTeX, 4 epsf figures. 2 extra references included. Version to appear in Phys Lett B
Published: 1997

48. Fermion Masses in a Supersymmetric SU(4)xSU(2)_LxSU(2)_R Model

Author: S. F. King and B. C. Allanach
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Physics beyond the Standard Model, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, Fermion, High Energy Physics - Phenomenology, Operator (computer programming), High Energy Physics - Phenomenology (hep-ph), Gauge group, High Energy Physics::Experiment, Phenomenology (particle physics), Lepton
Abstract: We calculate quark and lepton masses and quark mixing angles in the framework of a supersymmetric SU(4)$\otimes$SU(2)$_L\otimes$SU(2)$_R$ model where the gauge group is broken at 10$^{16}$ GeV. The model predicts third family top-bottom-tau Yukawa unification, as in minimal SO(10). The other smaller Yukawa couplings are assumed to arise from non-renormalisable operators suppressed by powers of some heavy scale. We perform a systematic operator analysis of the model in order to find the minimum set of operators which describe the low energy quark and lepton masses, and quark mixing angles consistent with low-energy phenomenology. A novel feature of the model is the possibility of asymmetric texture zeroes in the Yukawa matrices at the scale of the new physics. Successful predictions are obtained for $m_t$, $\tan \beta$, $m_s/m_\mu$, $m_d/m_e$ and $V_{ub}$ in terms of a CP violating phase $\phi$. For example, we predict $\tan \beta = 35-65$, $m_t = 130 - 190$ GeV, and $|V_{ub}|>0.0040$., Comment: Replaced version to appear in Nucl. Phys. B. Typos and other minor revisions. pages, uses epsf.sty, Latex. 13 uuencoded figures must be unpacked first (instructions at start of file.)
Published: 1995
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49. Supersymmetric Grand Unified Theories and Yukawa Unification

Author: B. C. Allanach
Subjects: Physics, High Energy Physics::Theory, Standard Model (mathematical formulation), Particle physics, Extension (metaphysics), Unification, High Energy Physics::Phenomenology, Doublet–triplet splitting problem, Yukawa potential, Grand Unified Theory, Supersymmetry, Parameter space
Abstract: In this paper, I intend to motivate supersymmetric grand unified theories (SUSY GUTs), briefly explain an extension of the standard model based on them and present a calculation performed using certain properties of some SUSY GUTs to constrain the available parameter space.
Published: 1995
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50. Bottom-Tau Yukawa Unification in the Next-to-Minimal Supersymmetric Standard Model

Author: Steve F. King and B. C. Allanach
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, Fermion, Parameter space, Bottom quark, Next-to-Minimal Supersymmetric Standard Model, Minimal model, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Lepton, Minimal Supersymmetric Standard Model
Abstract: We discuss the unification of the bottom quark and tau lepton Yukawa couplings within the framework of the next-to-minimal supersymmetric standard model. We compare the allowed regions of the $m_t$-$\tan \beta$ plane to those in the minimal supersymmetric standard model, and find that over much of the parameter space the deviation between the predictions of two models is small, and nearly always much less than the effect of current theoretical and experimental uncertainties in the bottom quark mass and the strong coupling constant. However over some regions of parameter space top-bottom Yukawa unification cannot be achieved. We also discuss the scaling of the light fermion masses and mixing angles, and show that to within current uncertainties the results of recent texture analyses performed for the minimal model also apply to the next-to-minimal model., Comment: Southampton preprint SHEP 93/94-15, This is a latex file with postscript figures attached to the end of the document
Published: 1994

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