The impact of universal extra dimensions on B→Xsγ, B→Xs gluon, B→Xsμ+μ−, KL→π0e+e− and ε′/ε

Buras, Andrzej J.; Poschenrieder, Anton; Spranger, Michael; Weiler, Andreas

doi:10.1016/j.nuclphysb.2003.11.010

Cited by 175 publications

(247 citation statements)

References 84 publications

(123 reference statements)

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“…The presence of KK-towers for charged and neutral CP-odd Higgs bosons provides a concrete example of this. The phenomenology of KK-excitations has been studied in great detail in recent times which covers its implications at colliders [3,4,5,6,7,8,9,10,11,12,13,14,15,16], in electroweak/flavour sector via various low-energy observables [17,18,19,20,21,22,23,24,25,26,27,28] and for dark matter/cosmology [5,13,29,30,31,32,33,34,35,36,37,38,39,40] In MUED there are only two extra free parameters when compared to the SM. These are the radius of compactification R (or, alternately R −1 , the scale of compactification) and the cutoff scale Λ of the theory.…”

Section: Introductionmentioning

confidence: 99%

Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

Bandyopadhyay

Bhattacherjee

Datta

2010

J. High Energ. Phys.

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The Higgs sector of the Universal Extra Dimensions (UED) has a rather involved setup. With one extra space dimension, the main ingredients to the construct are the higher Kaluza-Klein (KK) excitations of the Standard Model Higgs boson and the fifth components of the gauge fields which on compactification appear as scalar degrees of freedom and can mix with the former thus leading to physical KK-Higgs states of the scenario. In this work, we explore in detail the phenomenology of such a Higgs sector of the UED with the Large Hadron Collider (LHC) in focus. We work out relevant decay branching fractions involving the KK-Higgs excitations. Possible production modes of the KK-Higgs bosons are then discussed with an emphasis on their associated production with the third generation KK-quarks and that under the cascade decays of strongly interacting UED excitations which turn out to be the only phenomenologically significant modes. It is pointed out that the collider searches of such Higgs bosons face generic hardship due to soft end-products which result from severe degeneracies in the masses of the involved excitations in the minimal version of the UED (MUED). Generic implications of either observing some or all of the KK-Higgs bosons at the LHC are discussed.

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Section: Introductionmentioning

confidence: 99%

Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

Bandyopadhyay

Bhattacherjee

Datta

2010

J. High Energ. Phys.

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“…These studies, as well as those exploring the collider [6,14,15,16,17,18] and lowenergy [4,19,20,21,22,23,24,25] implications of UED, have focused on the SM KK spectrum, neglecting the gravitational sector. KK gravitons couple extremely weakly, so their effects are insignificant for colliders and low-energy experiments.…”

Section: Introductionmentioning

confidence: 99%

Graviton cosmology in universal extra dimensions

2003

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In models of universal extra dimensions, gravity and all standard model fields propagate in the extra dimensions. Previous studies of such models have concentrated on the Kaluza-Klein (KK) partners of standard model particles. Here we determine the properties of the KK gravitons and explore their cosmological implications. We find the lifetimes of decays to KK gravitons, of relevance for the viability of KK gravitons as dark matter. We then discuss the primordial production of KK gravitons after reheating. The existence of a tower of KK graviton states makes such production extremely efficient: for reheat temperature T RH and d extra dimensions, the energy density stored in gravitons scales as T 2+3d/2 RH . Overclosure and Big Bang nucleosynthesis therefore stringently constrain T RH in all universal extra dimension scenarios. At the same time, there is a window of reheat temperatures low enough to avoid these constraints and high enough to generate the desired thermal relic density for KK WIMP and superWIMP dark matter.

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“…This discrepancy exists and can not be killed even if the uncertainties of the form factors are taken into account. These results together with the other evidences for deviation of the ACD model predictions from those of the SM obtained by investigation of many observables related to the B and Λ b channels in [10,11,[17][18][19][20][21][22][23][24][25][26][27][33][34][35][36], can be considered as a sign for the existence of Kaluza-Klein particles and extra dimensions in the nature which should we search for at the LHC.…”

Section: Discussionmentioning

confidence: 86%

“…The Wilson coefficients in ACD Model are calculated in [10][11][12][13][14] in leading logarithmic approximation. In this model, each Wilson coefficient is described in terms of some periodic functions F (x t , 1/R) having an ordinary SM part F 0 (x t ) and an extra part in terms of the compactification factor 1/R, i.e.,…”

Section: Effective Hamiltonian Responsible For Thementioning

confidence: 99%

“…We consider the simplest UED model where just a single universal extra dimension compactified on a circle of radius R called the Appelquist, Cheng and Dobrescu (ACD) model [9] to investigate the B → K * 2 (1430)l + l − transition. The effective Hamiltonian responsible for b → s transition was calculated in the ACD model in [10][11][12][13][14]. In this model, the Kaluza-Klein (KK) particles interact with themselves as well as with the SM particles.…”

Section: Introductionmentioning

confidence: 99%

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B to strange tensor meson transition in a model with one universal extra dimension

Katırcı

Azizi

2011

J. High Energ. Phys.

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We analyze the semileptonic B → K * 2 (1430)l + l − transition in universal extra dimension model. In particular, we present the sensitivity of related observables such as branching ratio, polarization distribution and forward-backward asymmetry to the compactification factor (1/R) of extra dimension. The obtained results from extra dimension model show overall a considerable deviation from the standard model predictions for small values of the compactification factor. This can be considered as an indication for existence of extra dimensions.

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The impact of universal extra dimensions on B→Xsγ, B→Xs gluon, B→Xsμ+μ−, KL→π0e+e− and ε′/ε

Cited by 175 publications

References 84 publications

Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

Graviton cosmology in universal extra dimensions

B to strange tensor meson transition in a model with one universal extra dimension

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