Abstract
We show that the recent anomalies in b → sℓ + ℓ − transitions observed by the LHCb collaboration can be accommodated within string motivated models with a low mass Z′ gauge boson. Such Z′ gauge boson can be obtained in compactifications with a low string scale. We consider a class of intersecting D-brane models in which different families of quarks and leptons are simultaneously realized at different D-brane intersections. The explanation of b → sℓ + ℓ − anomalies via a stringy Z′ sets important restrictions on these viable D-brane constructions.
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LHCb collaboration, Measurement of form-factor-independent observables in the decay B 0 → K *0 μ + μ −, Phys. Rev. Lett. 111 (2013) 191801 [arXiv:1308.1707] [INSPIRE].
LHCb collaboration, Angular analysis and differential branching fraction of the decay B 0 s → ϕμ + μ −, JHEP 09 (2015) 179 [arXiv:1506.08777] [INSPIRE].
LHCb collaboration, Test of lepton universality using B + → K + ℓ + ℓ − decays, Phys. Rev. Lett. 113 (2014) 151601 [arXiv:1406.6482] [INSPIRE].
G. Hiller and F. Krüger, More model independent analysis of b → s processes, Phys. Rev. D 69 (2004) 074020 [hep-ph/0310219] [INSPIRE].
S. Descotes-Genon, T. Hurth, J. Matias and J. Virto, Optimizing the basis of B → K * ℓ + ℓ − observables in the full kinematic range, JHEP 05 (2013) 137 [arXiv:1303.5794] [INSPIRE].
R. Gauld, F. Goertz and U. Haisch, An explicit Z′-boson explanation of the B → K * μ + μ − anomaly, JHEP 01 (2014) 069 [arXiv:1310.1082] [INSPIRE].
A.J. Buras and J. Girrbach, Left-handed Z′ and Z FCNC quark couplings facing new b → sμ + μ − data, JHEP 12 (2013) 009 [arXiv:1309.2466] [INSPIRE].
R. Gauld, F. Goertz and U. Haisch, On minimal Z′ explanations of the B → K * μ + μ − anomaly, Phys. Rev. D 89 (2014) 015005 [arXiv:1308.1959] [INSPIRE].
A.J. Buras, F. De Fazio and J. Girrbach, 331 models facing new b → sμ + μ − data, JHEP 02 (2014) 112 [arXiv:1311.6729] [INSPIRE].
W. Altmannshofer, S. Gori, M. Pospelov and I. Yavin, Quark flavor transitions in L μ − L τ models, Phys. Rev. D 89 (2014) 095033 [arXiv:1403.1269] [INSPIRE].
A. Crivellin, G. D’Ambrosio and J. Heeck, Explaining h → μ ± τ ∓ , B → K * μ + μ − and B → Kμ + μ − /B→Ke + e − in a two-Higgs-doublet model with gauged L μ −L τ, Phys. Rev. Lett. 114 (2015) 151801 [arXiv:1501.00993] [INSPIRE].
A. Crivellin, G. D’Ambrosio and J. Heeck, Addressing the LHC flavor anomalies with horizontal gauge symmetries, Phys. Rev. D 91 (2015) 075006 [arXiv:1503.03477] [INSPIRE].
D. Aristizabal Sierra, F. Staub and A. Vicente, Shedding light on the b → s anomalies with a dark sector, Phys. Rev. D 92 (2015) 015001 [arXiv:1503.06077] [INSPIRE].
A. Celis, J. Fuentes-Martin, M. Jung and H. Serodio, Family nonuniversal Z′ models with protected flavor-changing interactions, Phys. Rev. D 92 (2015) 015007 [arXiv:1505.03079] [INSPIRE].
G. Bélanger, C. Delaunay and S. Westhoff, A dark matter relic from muon anomalies, Phys. Rev. D 92 (2015) 055021 [arXiv:1507.06660] [INSPIRE].
W. Altmannshofer and I. Yavin, Predictions for lepton flavor universality violation in rare B decays in models with gauged L μ − L τ , Phys. Rev. D 92 (2015) 075022 [arXiv:1508.07009] [INSPIRE].
A. Falkowski, M. Nardecchia and R. Ziegler, Lepton flavor non-universality in B-meson decays from a U(2) flavor model, JHEP 11 (2015) 173 [arXiv:1509.01249] [INSPIRE].
B. Allanach, F.S. Queiroz, A. Strumia and S. Sun, Z′ models for the LHCb and g − 2 muon anomalies, arXiv:1511.07447 [INSPIRE].
C. Niehoff, P. Stangl and D.M. Straub, Violation of lepton flavour universality in composite Higgs models, Phys. Lett. B 747 (2015) 182 [arXiv:1503.03865] [INSPIRE].
C. Niehoff, P. Stangl and D.M. Straub, Direct and indirect signals of natural composite Higgs models, arXiv:1508.00569 [INSPIRE].
A. Carmona and F. Goertz, Lepton flavor and non-universality from minimal composite Higgs setups, arXiv:1510.07658 [INSPIRE].
R. Blumenhagen, M. Cvetič, P. Langacker and G. Shiu, Toward realistic intersecting D-brane models, Ann. Rev. Nucl. Part. Sci. 55 (2005) 71 [hep-th/0502005] [INSPIRE].
R. Blumenhagen, B. Körs, D. Lüst and S. Stieberger, Four-dimensional string compactifications with D-branes, orientifolds and fluxes, Phys. Rept. 445 (2007) 1 [hep-th/0610327] [INSPIRE].
M.B. Green and J.H. Schwarz, Anomaly cancellation in supersymmetric D = 10 gauge theory and superstring theory, Phys. Lett. B 149 (1984) 117 [INSPIRE].
W.-Z. Feng, G. Shiu, P. Soler and F. Ye, Probing hidden sectors with Stückelberg U(1) gauge fields, Phys. Rev. Lett. 113 (2014) 061802 [arXiv:1401.5880] [INSPIRE].
W.-Z. Feng, G. Shiu, P. Soler and F. Ye, Building a Stückelberg portal, JHEP 05 (2014) 065 [arXiv:1401.5890] [INSPIRE].
D.M. Ghilencea, L.E. Ibáñez, N. Irges and F. Quevedo, TeV-scale Z′ bosons from D-branes, JHEP 08 (2002) 016 [hep-ph/0205083] [INSPIRE].
P. Langacker, The physics of heavy Z′ gauge bosons, Rev. Mod. Phys. 81 (2009) 1199 [arXiv:0801.1345] [INSPIRE].
D. Berenstein, R. Martinez, F. Ochoa and S. Pinansky, Z′ boson detection in the minimal quiver standard model, Phys. Rev. D 79 (2009) 095005 [arXiv:0807.1126] [INSPIRE].
J. Kumar, A. Rajaraman and J.D. Wells, Probing the Green-Schwarz mechanism at the Large Hadron Collider, Phys. Rev. D 77 (2008) 066011 [arXiv:0707.3488] [INSPIRE].
I. Antoniadis, A. Boyarsky, S. Espahbodi, O. Ruchayskiy and J.D. Wells, Anomaly driven signatures of new invisible physics at the Large Hadron Collider, Nucl. Phys. B 824 (2010) 296 [arXiv:0901.0639] [INSPIRE].
M. Williams, C.P. Burgess, A. Maharana and F. Quevedo, New constraints (and motivations) for Abelian gauge bosons in the MeV-TeV mass range, JHEP 08 (2011) 106 [arXiv:1103.4556] [INSPIRE].
L.A. Anchordoqui, H. Goldberg, X. Huang, D. Lüst and T.R. Taylor, Stringy origin of Tevatron Wjj anomaly, Phys. Lett. B 701 (2011) 224 [arXiv:1104.2302] [INSPIRE].
L.A. Anchordoqui et al., Z′-gauge bosons as harbingers of low-mass strings, Phys. Rev. D 85 (2012) 086003 [arXiv:1107.4309] [INSPIRE].
L.A. Anchordoqui et al., Stringy origin of diboson and dijet excesses at the LHC, Phys. Lett. B 749 (2015) 484 [arXiv:1507.05299] [INSPIRE].
L.E. Ibáñez, F. Marchesano and R. Rabadán, Getting just the standard model at intersecting branes, JHEP 11 (2001) 002 [hep-th/0105155] [INSPIRE].
C. Kokorelis, New standard model vacua from intersecting branes, JHEP 09 (2002) 029 [hep-th/0205147] [INSPIRE].
A.J. Buras, Weak Hamiltonian, CP-violation and rare decays, in Probing the standard model of particle interactions. Proceedings. Summer School in Theoretical Physics, NATO Advanced Study Institute, 68th session, Les Houches France, 28 Jul–5 Sep 1997, Pt. 1, 2, pp. 281–539 [hep-ph/9806471] [INSPIRE].
S. Descotes-Genon, L. Hofer, J. Matias and J. Virto, Global analysis of b → sℓℓ anomalies, arXiv:1510.04239 [INSPIRE].
W. Altmannshofer and D.M. Straub, New physics in b → s transitions after LHC run 1, Eur. Phys. J. C 75 (2015) 382 [arXiv:1411.3161] [INSPIRE].
W. Altmannshofer and D.M. Straub, Implications of b → s measurements, in 50th Rencontres de Moriond on EW Interactions and Unified Theories, La Thuile Italy, 14–21 Mar 2015 [arXiv:1503.06199] [INSPIRE].
D. Ghosh, M. Nardecchia and S.A. Renner, Hint of lepton flavour non-universality in B meson decays, JHEP 12 (2014) 131 [arXiv:1408.4097] [INSPIRE].
F. Beaujean, C. Bobeth and D. van Dyk, Comprehensive Bayesian analysis of rare (semi)leptonic and radiative B decays, Eur. Phys. J. C 74 (2014) 2897 [Erratum ibid. C 74 (2014) 3179] [arXiv:1310.2478] [INSPIRE].
T. Hurth, F. Mahmoudi and S. Neshatpour, Global fits to b → sℓℓ data and signs for lepton non-universality, JHEP 12 (2014) 053 [arXiv:1410.4545] [INSPIRE].
S. Jäger and J. Martin Camalich, Reassessing the discovery potential of the B → K * ℓ + ℓ − decays in the large-recoil region: SM challenges and BSM opportunities, arXiv:1412.3183 [INSPIRE].
A. Khodjamirian, T. Mannel, A.A. Pivovarov and Y.M. Wang, Charm-loop effect in B → K (*) ℓ + ℓ − and B → K * γ, JHEP 09 (2010) 089 [arXiv:1006.4945] [INSPIRE].
A. Khodjamirian, T. Mannel and Y.M. Wang, B → Kℓ + ℓ − decay at large hadronic recoil, JHEP 02 (2013) 010 [arXiv:1211.0234] [INSPIRE].
V. Barger, C.-W. Chiang, P. Langacker and H.-S. Lee, Z′ mediated flavor changing neutral currents in B meson decays, Phys. Lett. B 580 (2004) 186 [hep-ph/0310073] [INSPIRE].
V. Barger et al., b → s transitions in family-dependent U(1)′ models, JHEP 12 (2009) 048 [arXiv:0906.3745] [INSPIRE].
A.J. Buras, F. De Fazio and J. Girrbach, The anatomy of Z′ and Z with flavour changing neutral currents in the flavour precision era, JHEP 02 (2013) 116 [arXiv:1211.1896] [INSPIRE].
G. Hiller and M. Schmaltz, Diagnosing lepton-nonuniversality in b → sℓℓ, JHEP 02 (2015) 055 [arXiv:1411.4773] [INSPIRE].
E. Accomando, A. Belyaev, L. Fedeli, S.F. King and C. Shepherd-Themistocleous, Z′ physics with early LHC data, Phys. Rev. D 83 (2011) 075012 [arXiv:1010.6058] [INSPIRE].
CMS collaboration, Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at \( \sqrt{s}=8 \) TeV, JHEP 04 (2015) 025 [arXiv:1412.6302] [INSPIRE].
S. Godfrey and T. Martin, Z′ discovery reach at future hadron colliders: a Snowmass white paper, in Community Summer Study 2013: Snowmass on the Mississippi, Minneapolis U.S.A. (2013) [arXiv:1309.1688] [INSPIRE].
L.E. Ibáñez, R. Rabadán and A.M. Uranga, Anomalous U(1)′s in type I and type IIB D = 4, N = 1 string vacua, Nucl. Phys. B 542 (1999) 112 [hep-th/9808139] [INSPIRE].
E. Poppitz, On the one loop Fayet-Iliopoulos term in chiral four-dimensional type-I orbifolds, Nucl. Phys. B 542 (1999) 31 [hep-th/9810010] [INSPIRE].
G. Aldazabal, S. Franco, L.E. Ibáñez, R. Rabadán and A.M. Uranga, D = 4 chiral string compactifications from intersecting branes, J. Math. Phys. 42 (2001) 3103 [hep-th/0011073] [INSPIRE].
C. Corianò, N. Irges and E. Kiritsis, On the effective theory of low scale orientifold string vacua, Nucl. Phys. B 746 (2006) 77 [hep-ph/0510332] [INSPIRE].
I. Antoniadis, S. Dimopoulos and G.R. Dvali, Millimeter range forces in superstring theories with weak scale compactification, Nucl. Phys. B 516 (1998) 70 [hep-ph/9710204] [INSPIRE].
I. Antoniadis, N. Arkani-Hamed, S. Dimopoulos and G.R. Dvali, New dimensions at a millimeter to a Fermi and superstrings at a TeV, Phys. Lett. B 436 (1998) 257 [hep-ph/9804398] [INSPIRE].
S. Cullen, M. Perelstein and M.E. Peskin, TeV strings and collider probes of large extra dimensions, Phys. Rev. D 62 (2000) 055012 [hep-ph/0001166] [INSPIRE].
P. Burikham, T. Figy and T. Han, TeV-scale string resonances at hadron colliders, Phys. Rev. D 71 (2005) 016005 [Erratum ibid. D 71 (2005) 019905] [hep-ph/0411094] [INSPIRE].
D. Lüst, S. Stieberger and T.R. Taylor, The LHC string hunter’s companion, Nucl. Phys. B 808 (2009) 1 [arXiv:0807.3333] [INSPIRE].
L.A. Anchordoqui et al., Dijet signals for low mass strings at the LHC, Phys. Rev. Lett. 101 (2008) 241803 [arXiv:0808.0497] [INSPIRE].
D. Carmi, TeV scale strings and scattering amplitudes at the LHC, arXiv:1109.5161 [INSPIRE].
L.A. Anchordoqui et al., String resonances at hadron colliders, Phys. Rev. D 90 (2014) 066013 [arXiv:1407.8120] [INSPIRE].
L.E. Ibáñez and F. Quevedo, Anomalous U(1)’s and proton stability in brane models, JHEP 10 (1999) 001 [hep-ph/9908305] [INSPIRE].
M. Berasaluce-Gonzalez, L.E. Ibáñez, P. Soler and A.M. Uranga, Discrete gauge symmetries in D-brane models, JHEP 12 (2011) 113 [arXiv:1106.4169] [INSPIRE].
P. Anastasopoulos, M. Cvetič, R. Richter and P.K.S. Vaudrevange, String constraints on discrete symmetries in MSSM type II quivers, JHEP 03 (2013) 011 [arXiv:1211.1017] [INSPIRE].
G. Honecker and W. Staessens, To tilt or not to tilt: discrete gauge symmetries in global intersecting D-brane models, JHEP 10 (2013) 146 [arXiv:1303.4415] [INSPIRE].
L.E. Ibáñez and A.M. Uranga, Neutrino Majorana masses from string theory instanton effects, JHEP 03 (2007) 052 [hep-th/0609213] [INSPIRE].
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Celis, A., Feng, WZ. & Lüst, D. Stringy explanation of b → sℓ + ℓ − anomalies. J. High Energ. Phys. 2016, 7 (2016). https://doi.org/10.1007/JHEP02(2016)007
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DOI: https://doi.org/10.1007/JHEP02(2016)007