%0 Journal Article %1 McElrath2005Invisible %A McElrath, Bob %D 2005 %K bsm, upsilon %T Invisible Quarkonium Decays as a Sensitive Probe of Dark Matter %U http://arxiv.org/abs/hep-ph/0506151 %X We examine in a model-independent manner the measurements that can be performed at B-factories with sensitivity to dark matter. If a singlet scalar, pseudo-scalar, or vector is present and mediates the Standard Model - dark matter interaction, it can mediate invisible decays of quarkonium states such as the \$\Upsilon\$, \$J/\Psi\$, and \$\eta\$. Such scenarios have arisen in the context of supersymmetry, extended Higgs sectors, solutions the supersymmetric \$\mu\$ problem, and extra U(1) gauge groups from grand unified theories and string theory. Existing B-factories running at the \$\Upsilon(4S)\$ can produce lower \$\Upsilon\$ resonances by emitting an Initial State Radiation (ISR) photon. Using a combination of ISR and radiative decays, the initial state of an invisibly decaying quarkonium resonance can be tagged, giving sensitivity to the spin and CP-nature of the particle that mediates standard model-dark matter interactions. These measurements can discover or place strong constraints on dark matter scenarios where the dark matter is approximately lighter than the \$b\$-quark. For the decay chains \$\Upsilon(nS) \pi^+ \pi^- \Upsilon(1S)\$ (n=2,3) we analyze the dominant backgrounds and determine that with \$400 fb^-1\$ collected at the \$\Upsilon(4S)\$, the B-factories can limit \$BR(\Upsilon(1S) invisible) 0.1\%\$.

@article{McElrath2005Invisible, abstract = {We examine in a model-independent manner the measurements that can be performed at B-factories with sensitivity to dark matter. If a singlet scalar, pseudo-scalar, or vector is present and mediates the Standard Model - dark matter interaction, it can mediate invisible decays of quarkonium states such as the \$\Upsilon\$, \$J/\Psi\$, and \$\eta\$. Such scenarios have arisen in the context of supersymmetry, extended Higgs sectors, solutions the supersymmetric \$\mu\$ problem, and extra U(1) gauge groups from grand unified theories and string theory. Existing B-factories running at the \$\Upsilon(4S)\$ can produce lower \$\Upsilon\$ resonances by emitting an Initial State Radiation (ISR) photon. Using a combination of ISR and radiative decays, the initial state of an invisibly decaying quarkonium resonance can be tagged, giving sensitivity to the spin and CP-nature of the particle that mediates standard model-dark matter interactions. These measurements can discover or place strong constraints on dark matter scenarios where the dark matter is approximately lighter than the \$b\$-quark. For the decay chains \$\Upsilon(nS) \to \pi^+ \pi^- \Upsilon(1S)\$ (n=2,3) we analyze the dominant backgrounds and determine that with \$400 fb^{-1}\$ collected at the \$\Upsilon(4S)\$, the B-factories can limit \$BR(\Upsilon(1S) \to invisible) \lsim 0.1\%\$.}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {McElrath, Bob}, biburl = {https://www.bibsonomy.org/bibtex/22b794185b8956076b5355ff46e9cfa7d/cmcneile}, citeulike-article-id = {7923700}, citeulike-linkout-0 = {http://arxiv.org/abs/hep-ph/0506151}, citeulike-linkout-1 = {http://arxiv.org/pdf/hep-ph/0506151}, day = 25, eprint = {hep-ph/0506151}, interhash = {5674a0f8bf9b10371d25ee2bcba51e48}, intrahash = {2b794185b8956076b5355ff46e9cfa7d}, keywords = {bsm, upsilon}, month = sep, posted-at = {2010-09-29 13:13:30}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Invisible Quarkonium Decays as a Sensitive Probe of Dark Matter}}, url = {http://arxiv.org/abs/hep-ph/0506151}, year = 2005 }